Recent developments in earth-abundant and non-noble electrocatalysts for water electrolysis
作者：
Yu, F.;Yu, L.;Mishra, I. K.;Yu, Y.;Ren, Z. F.;...
期刊：
Materials Today Physics ,2018年7:121-138 ISSN：2542-5293
通讯作者：
Zhou, H. Q.
作者机构：
[Zhou, H. Q.; Yu, F.] Hunan Normal Univ, Sch Phys & Elect, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[Mishra, I. K.; Yu, L.; Ren, Z. F.] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Mishra, I. K.; Yu, L.; Ren, Z. F.] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Yu, Y.; Yu, L.] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Zhou, H. Q.] H;Hunan Normal Univ, Sch Phys & Elect, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.
关键词：
Bifunctional;Electrocatalyst;Hydrogen evolution reaction;Overall water splitting;Oxygen evolution reaction
摘要：
Exploiting the peak excess electricity from abundant but intermittent wind and solar energy or from the overnight surplus in power grids to produce a storable chemical fuel as an alternative to conventional fossil fuels is very appealing yet challenging. Hydrogen produced by water electrolysis is an ideal energy carrier for potentially scalable storage of these energy sources because it has high energy density and does not emit any pollutant or greenhouse gas upon combustion. However, overall water splitting, including hydrogen evolution reaction and oxygen evolution reaction (HER and OER, respectively), currently requires a large excess potential to expedite the reactions (200-400 mA cm (2) at cell voltages of 1.8 V-2.4 V in base), resulting in less than 4% of the world's industrial hydrogen being produced by electrolysis. To overcome this obstacle, as well as the high cost of traditional noble-metal catalysts, considerable achievements have been made recently in the development of cheap and earth-abundant electrocatalysts, including some robust catalysts approaching commercial criteria, but reviews of these electrocatalysts and their compatibility with commercial-scale water electrolysis remain lacking. In this review, we will present an overview of recent developments in the production of high-performance earth-abundant and non-noble electrocatalysts for HER and OER, as well as for overall water splitting. With an eye toward the commercialization of water electrolysis, emphasis is placed on the most efficient electrocatalysts for either HER or OER, as well as those showing sustainable capability of withstanding accelerated degradation under large current densities (>= 500 mA cm(-2)) over long periods of time, which is critically indispensable for actual applications of this technology. The major challenges facing the production of such electrocatalysts and possible future improvements in the fabrication of robust electrocatalysts for water electrolysis are also highlighted. (C) 2018 Elsevier Ltd. All rights reserved.
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Nest-like V3O7 self-assembled by porous nanowires as an anode supercapacitor material and its performance optimization through bonding with N-doped carbon
作者：
Zhao, Danyang;Zhu, Qiancheng;Chen, Dejian;Li, Xi;Yu, Ying* ;...
期刊：
Journal of Materials Chemistry A ,2018年6(34):16475-16484 ISSN：2050-7488
通讯作者：
Yu, Ying;Huang, Xintang
作者机构：
[Zhu, Qiancheng; Chen, Dejian; Huang, Xintang; Yu, Ying; Huang, XT; Zhao, Danyang; Li, Xi] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Y; Huang, XT] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Vanadium oxides (such as V 2 O 5 , V 2 O 3 and VO 2 ) hold great promise as electrode materials for energy storage due to their high electrochemical activity, low cost and environmental benignity. However, V 3 O 7 is rarely investigated as a supercapacitor material. Herein, nest-like V 3 O 7 self-assembled by porous V 3 O 7 nanowires was fabricated. The energy storage mechanism of V 3 O 7 was investigated at different reaction potentials. It was found that V 3 O 7 was converted to V 6 O 13 at a potential of -0.6 V, and became V 2 O 5 at 0.2 V. Additionally, an in situ photopolymerization method was introduced to synthesize V 3 O 7 @polypyrrole (PPy) and then, V 3 O 7 nanowires coated with a layer of N-doped carbon were obtained after calcination to enhance the performance in terms of capacitance and stability. This unique N-doped carbon coated nest-like V 3 O 7 (NC-V 3 O 7 ) exhibited a high specific capacitance of 660.63 F g -1 at a current density of 0.5 A g -1 and even reached 187.72 F g -1 at a high current density of 50 A g -1 . According to this investigation, the superior performance of NC-V 3 O 7 is attributed to the synergy between N-doped carbon and V 3 O 7 , that is, the unique three layer structure (C bonded both to V and N) stabilized V 3 O 7 and supported high-speed ionic and electronic transmission channels. Finally, full symmetric (NC-V 3 O 7 //NC-V 3 O 7 ) and asymmetric (MnO 2 nanosheets//NV-V 3 O 7 ) supercapacitor devices were assembled and showed higher power and energy density than those of related reports. © 2018 The Royal Society of Chemistry.
语种：
英文
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Ternary Ni2(1-x)Mo2xP nanowire arrays toward efficient and stable hydrogen evolution electrocatalysis under large-current-density
作者：
Yu, Luo;Mishra, Ishwar Kumar;Xie, Yunlong* ;Zhou, Haiqing;Sun, Jingying;...
期刊：
Nano Energy ,2018年53:492-500 ISSN：2211-2855
通讯作者：
Xie, Yunlong;Yu, Ying;Chen, Shuo;Ren, Zhifeng
作者机构：
[Xie, Yunlong; Yu, Ying; Yu, Luo; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Mishra, Ishwar Kumar; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Ni, Yizhou; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Mishra, Ishwar Kumar; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Ni, Yizhou; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Xie, Yunlong] Hubei Normal Univ, Inst Adv Mat, Huangshi 435002, Peoples R China.;[Xie, Yunlong] Hubei Normal Univ, Sch Phys & Elect Sci, Huangshi 435002, Peoples R China.
通讯机构：
[Xie, YL; Yu, Y] C;[Chen, S; Ren, ZF] U;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
关键词：
DFT;HER;Large-current-density;Ni2(1-x)Mo2xP;Porous nanowire arrays
摘要：
Developing efficient nonprecious electrocatalysts for hydrogen evolution reaction (HER) in alkaline media at large-current-density is appealing and challenging for large-scale water electrolysis. Here, we present a theoretical and experimental study to demonstrate that ternary Ni 2(1-x) Mo 2x P porous nanowire arrays grown on Ni foam, as a highly efficient and stable electrocatalyst toward alkaline HER under large-current-density. Density functional theory (DFT) calculations reveal that Mo substitution of Ni in Ni 2 P leads to optimal free energy of water activation and hydrogen adsorption on the catalyst surface. Benefiting from the enhanced intrinsic activity, large active surface area and fast gas releasing, the Ni 2(1-x) Mo 2x P catalyst exhibits an excellent HER activity with low overpotentials of 72, 240, and 294 mV at current densities of 10, 500, and 1000 mA cm −2 , respectively, along with superior stability in 1 M KOH. This highly active and stable catalyst enables an electrolyzer operating at 10 mA cm −2 at a voltage of 1.51 V, 100 mA cm −2 at 1.65 V, and 500 mA cm −2 at 1.82 V in 1 M KOH at room temperature, which are much better than the benchmark of IrO 2 /Pt. Our 3D ternary Ni 2(1-x) Mo 2x P catalysts significantly advance the science and technology for commercial hydrogen production. © 2018 Elsevier Ltd
语种：
英文
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Hierarchical porous Fe2O3 assisted with graphene-like carbon as high-performance lithium battery anodes
作者：
Hu, Hao;Cheng, Haoyan;Zhou, Jianqing;Zhu, Qiancheng;Yu, Ying*
期刊：
Materials Today Physics ,2017年3:7-15 ISSN：2542-5293
通讯作者：
Yu, Ying
作者机构：
[Zhu, Qiancheng; Hu, Hao; Cheng, Haoyan; Yu, Ying; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
关键词：
Graphene-like carbon;Hierarchical porous Fe2O3;Lithium battery;Surface-protected etching strategy
摘要：
Compared with bottom-up method of self-assembly, top-down technology (such as surface-protected etching strategy) is much more efficient and high-yield to build a stable hierarchical electrode for lithium battery. Herein, a water-soluble polymer of polyethyleneimine (PEI) is used as structure protector to achieve Fe2O3 hierarchical microcube. Due to the cross-link between PEI and iron ions, the formed Fe2O3 nanorods tightly connect with each other and form hierarchical structure. After the carbonization of PEI, hierarchical porous Fe2O3 microcube assisted with graphene-like carbon can be prepared, which shows very good electrochemical performance. In short, the hybrid electrode possesses high reversible capacitance of 892 mA h/g at 0.5 A/g, good rate capability (the capacity robustly recovered after 710 cycles at various current rates), and cycling stability (96.2% capacity retention after 550 cycles at 3 A/g, trivial 0.007% capacity decay per cycle). This strategy can be widely used in the synthesis of other hierarchical structure materials with excellent performance. (c) 2017 Elsevier Ltd. All rights reserved.
语种：
英文
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LSDA+U study on the electronic and anti-ferromagnetic properties of Ni-doped CuO and Cu-doped NiO
作者：
Li, Yujie;Yang, Fan* ;Yu, Ying*
期刊：
催化学报 ,2017年38(5):767-774 ISSN：0253-9837
通讯作者：
Yu, Ying;Yang, Fan
作者机构：
[Yu, Ying; Li, Yujie] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Yang, Fan] Wuhan Text Univ, Inst Elect & Elect Engn, Wuhan 430200, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;[Yang, Fan] W;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Wuhan Text Univ, Inst Elect & Elect Engn, Wuhan 430200, Hubei, Peoples R China.
关键词：
LSDA+U;CuO;NiO;Magnetic moment;Electronic structure;Photocatalysis
摘要：
Doping is an effective way to improve the activity of photocatalysts. The effect of doping on the magnetic properties of some photocatalysts that are easily recycled was studied using the local spin density approximation (LSDA)+U method on typical divalent metal oxide semiconductors CuO, NiO, Ni-doped CuO, and Cu-doped NiO. It is found that the influence of Ni doping on the spatial structure of CuO and that of Cu doping on the spatial structure of NiO are negligible because of the similar radii of Ni2+ and Cu2+. The valence band and conduction band for Ni-doped CuO are clearly spin-split, corresponding to a net effective magnetic moment of µeff=1.66 µB. This may improve the photocatalytic efficiency and raise the recycle rate of photocatalysts. In the Cu-doped NiO system, the presence of Cu 3d states near to the Fermi level increases the width of the valence band and narrows the band gap with respect to that in pure NiO. Beyond the Cu 3d states, within the band gap, appear two energy levels around the Fermi level, which may effectively separate the electron-hole pair and also lead to enhanced absorption of visible light and infrared light. It can be concluded that the observed changes in the band structure may be helpful for improving the activity of photocatalysts and the doped systems have net magnetic moments, meaning that they are easily recycled and can be reused. © 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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英文
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Light responsive hybrid nanofibres for on-demand therapeutic drug and cell delivery
作者：
Li, Yan-Fang;Slemming-Adamsen, Peter;Wang, Jing;Song, Jie;Wang, Xueqin;...
期刊：
Journal of Tissue Engineering and Regenerative Medicine ,2017年11(8):2411-2420 ISSN：1932-6254
通讯作者：
Chen, Menglin
作者机构：
[Slemming-Adamsen, Peter; Li, Yan-Fang; Wang, Xueqin; Chen, Menglin; Besenbacher, Flemming; Song, Jie; Dong, Mingdong] Aarhus Univ, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus, Denmark.;[Chen, Chunying; Wang, Jing] Natl Ctr Nanosci & Technol, Beijing, Peoples R China.;[Li, Yan-Fang; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan, Hubei, Peoples R China.
通讯机构：
[Chen, Menglin] A;Aarhus Univ, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus, Denmark.
关键词：
light responsive;nanofibres;on-demand;drug release;cell delivery
摘要：
Smart materials for on-demand delivery of therapeutically active agents are challenging in pharmaceutical and biomaterials science. In the present study, we report hybrid nanofibres capable of being reversibly controlled to pulsatile deliver both therapeutic drugs and cells on-demand of near-infrared (NIR) light. The nanofibres, fabricated by co-electrospinning of poly (N-isopropylacrylamide), silica-coated gold nanorods and polyhedral oligomeric silsesquinoxanes have, for the first time, demonstrated rapid, reversible large-volume changes of 83% on-demand with NIR stimulation, with retained nanofibrous morphology. Combining with the extracellular matrix-mimicking fibrillary properties, the nanofibres achieved accelerated release of model drug or cells on demand with NIR triggering. The release of the model drug doxorubicin demonstrated normal anti-cancer efficacy by reducing the viability of human cervical cancer HeLa cells by 97% in 48 h. In parallel, the fibres allowed model cell NIH3T3 fibroblast entrapment, adhesion, proliferation, differentiation and, upon NIR irradiation, cell release with undisturbed cellular function. Copyright © 2016 John Wiley & Sons, Ltd.
语种：
英文
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Design of a unique 3D-nanostructure to make MnO2 work as supercapacitor material in acid environment
作者：
Zhu, Qiancheng;Liu, Kuan;Zhou, Jianqing;Hu, Hao;Chen, Wenjuan;...
期刊：
Chemical Engineering Journal ,2017年321:554-563 ISSN：1385-8947
通讯作者：
Yu, Ying
作者机构：
[Zhu, Qiancheng; Liu, Kuan; Hu, Hao; Chen, Wenjuan; Yu, Ying; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Acid solution;Asymmetric supercapacitor;MnO2 nanosheets;PPy;TiO2 nanotube arrays
摘要：
Novel 3D-nanostructured TiO<inf>2</inf>nanotube arrays @MnO<inf>2</inf>nanosheets@ polypyrrole (TMP) supercapacitor material has been designed with the capability to work in acidic condition efficiently. In this structure, TiO<inf>2</inf>nanotube arrays (TNAs) served as the scaffold to support MnO<inf>2</inf>nanosheets and polypyrrole (PPy) as a barrier to limit the dissolution of MnO<inf>2</inf>during discharge process. The dissolution mechanism of MnO<inf>2</inf>in acidic solution during discharge process was further investigated. The synergistic effect of the three components in this structure enhanced the cycling stability of MnO<inf>2</inf>from just 1 cycle to thousand cycles. It is found that the capacitance of TMP in 1 M H<inf>2</inf>SO<inf>4</inf>solution was even 2-fold of that in traditional neutral solution (1 M Na<inf>2</inf>SO<inf>4</inf>solution) due to the superior conductivity of acid solution. Finally, a full flexible solid-state asymmetric supercapacitor device composed of TMP and carbon nanotubes (TMP//CNTs) was fabricated and worked in a wide voltage window of 0–2.4 V in acidic condition, which was profited from the “passivation effect”of acidic electrolyte. The device showed excellent electrochemical performance with a high specific energy of 2.12 mW h cm<sup>−3</sup>at a power density of 0.04 W cm<sup>−3</sup>and remarkable cycling stability with 80.3% specific capacitance retention even after 20,000 cycles. ©2017 Elsevier B.V.
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英文
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Platinum nanoparticles supported on defective tungsten bronze-type KSr2Nb5O15 as a novel photocatalyst for efficient ethylene oxidation
作者：
Zhang, Wei;Pan, Xiaoyang;Long, Peiqing;Liu, Xitao;Long, Xia;...
期刊：
Journal of Materials Chemistry A ,2017年5(36):18998-19006 ISSN：2050-7488
通讯作者：
Yi, Zhiguo;Yu, Ying
作者机构：
[Pan, Xiaoyang; Zhang, Wei; Yi, Zhiguo; Long, Peiqing; Liu, Xitao; Long, Xia] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China.;[Zhang, Wei; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Yi, Zhiguo] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
通讯机构：
[Yi, Zhiguo; Yu, Ying] C;[Yi, Zhiguo] U;Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China.;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
摘要：
Efficient separation and extraction of photo-induced carriers are crucial aspects of efficient semiconductor photocatalytic systems employed for photocatalytic oxidation (PCO) technology. In this study, a Pt-loaded KSr2Nb5O15 composite, as a novel photocatalyst, is reported for gaseous ethylene photo-oxidation, performing excellent PCO activity. Tungsten bronze-type KSr2Nb5O15 (KSNO) with surface oxygen vacancies is prepared by a facile and low-cost molten salt synthesis method at 1200 °C for 6 h and a possible morphology evolution process was proposed. Pt was loaded on KSNO through a facile photodeposition method. The strong metal-support interaction (SMSI) between the Pt nanoparticles and the oxygen-deficient KSNO support is beneficial for superior photocatalytic efficiency and stability toward ethylene photo-oxidation. What's more, the structure and charge transfer path in the synthesized photocatalysts were investigated by X-ray photoelectron spectroscopy (XPS), high-resolution electron microscopy, and electron paramagnetic resonance (EPR). © 2017 The Royal Society of Chemistry.
语种：
英文
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Copper nanoparticle interspersed MoS2 nanoflowers with enhanced efficiency for CO2 electrochemical reduction to fuel
作者：
Shi, Guodong;Yu, Luo;Ba, Xin;Zhang, Xiaoshu;Zhou, Jianqing;...
期刊：
DALTON TRANSACTIONS ,2017年46(32):10569-10577 ISSN：1477-9226
通讯作者：
Yu, Ying
作者机构：
[Ba, Xin; Zhang, Xiaoshu; Yu, Ying; Shi, Guodong; Yu, Luo; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Electrocatalytic conversion of carbon dioxide (CO2) has been considered as an ideal method to simultaneously solve the energy crisis and environmental issue around the world. In this work, ultrasmall Cu nanoparticle interspersed flower-like MoS2 was successfully fabricated via a facile microwave hydrothermal method. The designed optimal hierarchical Cu/MoS2 composite not only exhibited remarkably enhanced electronic conductivity and specific surface area but also possessed improved CO2 adsorption capacity, resulting in a significant increase in overall faradaic efficiency and a 7-fold augmentation of the faradaic efficiency of CH4 in comparison with bare MoS2. In addition, the Cu/MoS2 composite had superior stability with high efficiency retained for 48 h in the electrochemical process. It is anticipated that the designed Cu/MoS2 composite electrocatalyst may provide new insights for transition metal sulfides and non-noble particles applied to CO2 reduction. © 2017 The Royal Society of Chemistry.
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英文
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Hierarchical Cu@CoFe layered double hydroxide core-shell nanoarchitectures as bifunctional electrocatalysts for efficient overall water splitting
作者：
Yu, Luo;Zhou, Haiqing;Sun, Jingying;Qin, Fan;Luo, Dan;...
期刊：
Nano Energy ,2017年41:327-336 ISSN：2211-2855
通讯作者：
Yu, Ying;Chen, Shuo;Ren, Zhifeng
作者机构：
[Li, Yong; Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Xie, Lixin; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Luo, Dan; Chen, Shuo; Ren, Zhifeng; Xie, Lixin; Zhou, Haiqing; Yu, Luo; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Bao, Jiming; Qin, Fan] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.;[Luo, Dan] Univ Houston, Dept Chem & Biomol Engn, Houston, TX 77204 USA.
通讯机构：
[Yu, Ying] C;[Chen, S; Ren, ZF] U;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
关键词：
Bifunctional;Core-shell;Hierarchical;Overall water splitting;[email protected] LDH
摘要：
Efficient and low-cost bifunctional catalysts toward both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for overall water splitting are of great significance to energy and environmental sustainability. Here, we report on a novel hierarchical Cu@CoFe layered double hydroxide (LDH) core-shell nanostructure catalyst for efficient overall water splitting in the alkaline medium. Benefiting from the smart structure, the optimized composite affords small overpotentials of 171 mV for the HER and 240 mV for the OER at a current density of 10 mA cm<sup>−2</sup>, along with Tafel slopes of 36.4 and 44.4 mV dec<sup>−1</sup>for the HER and OER, respectively. Strikingly, the overall water splitting performance is very good since it just requires a voltage of 1.681 V to gain a current density of 10 mA cm<sup>−2</sup>, which is only 60 mV larger than the benchmark of IrO<inf>2</inf>(+)/Pt (−) electrodes. Moreover, the optimized composite electrodes exhibit outstanding durability within 48 h testing, which is much better than that of the benchmark. Our rational design of the hierarchical core-shell nanoarchitectures presents a simple approach to fabricate advanced catalysts for water splitting. ©2017 Elsevier Ltd
语种：
英文
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Controllable synthesis of SrCO3 with different morphologies and their co-catalytic activities for photocatalytic oxidation of hydrocarbon gases over TiO2
作者：
Zhang, Wei;Yu, Ying* ;Yi, Zhiguo*
期刊：
Journal of Materials Science ,2017年52(9):5106-5116 ISSN：0022-2461
通讯作者：
Yu, Ying;Yi, Zhiguo
作者机构：
[Zhang, Wei; Yu, Ying] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Zhang, Wei; Yi, Zhiguo] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China.;[Zhang, Wei; Yi, Zhiguo] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China.
通讯机构：
[Yu, Ying; Yi, Zhiguo] C;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Peoples R China.;Chinese Acad Sci, Fujian Inst Res Struct Matter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Peoples R China.
关键词：
TiO2;Photocatalytic Activity;Reverse Micelle;Photocatalytic Oxidation;Field Emission Scanning Electron Microscope Image
摘要：
The controlled synthesis of strontium carbonate (SrCO<inf>3</inf>) micro-/nanostructures with various morphologies, such as sphere, pompon, arborization, spindle, and hexagonal prism, are successfully achieved through rather facile hydrothermal processes. The morphology of SrCO<inf>3</inf>can be elegantly adjusted by employing different CO<inf>3</inf><sup>2−</sup>sources and controlling the viscidity of the organic solvents. The underlying mechanism of morphology evolution is discussed. Moreover, the SrCO<inf>3</inf>-loaded TiO<inf>2</inf>(SrCO<inf>3</inf>/TiO<inf>2</inf>) nanocomposites are shown to improve the activity for oxidizing hydrocarbon gases under simulated solar light irradiation. The 5.0 wt% SrCO<inf>3</inf>(nanosphere)/TiO<inf>2</inf>exhibited the highest performance toward the oxidation of the hydrocarbons gases, and its activity on methane oxidation is more than double that of P25 TiO<inf>2</inf>. These results are valuable for both carbonate synthesis and their use in the oxidation of hydrocarbons gases. ©2017, Springer Science+Business Media New York.
语种：
英文
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In-situ synthesis of TiO_2 rutile/anatase heterostructure by DC magnetron sputtering at room temperature and thickness effect of outermost rutile layer on photocatalysis
作者：
Wang Hui;Shi Guodong;Zhang Xiaoshu;Zhang Wei;Huang Lin;...
期刊：
环境科学学报(英文版) ,2017年60(10):33-42 ISSN：1001-0742
通讯作者：
Yu Ying
作者机构：
[Zhang Xiaoshu; Zhang Wei; Yu Ying; Shi Guodong; Huang Lin; Wang Hui] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Wang Hui] Wuhan Univ Sci & Technol, Hubei Prov Key Lab Syst Sci Met Proc, Wuhan 430081, Hubei, Peoples R China.
通讯机构：
[Yu Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
关键词：
TiO_2 film;Heterostructure;Magnetron sputtering;Dye degradation
摘要：
TiO_2 rutile/anatase heterostructure thin films with varying rutile thickness have been in-situ synthesized via DC magnetron sputtering with Ar gas at room temperature. The crystal texture, surface morphology, energy gap and optical properties of the films have been investigated by X-ray diffraction meter, grazing incidence X-ray diffraction meter, Raman spectroscopy, scanning electron microscopy, and UV–visible spectrophotometer, which indicates that the rutile/anatase heterostructure films are successfully fabricated. The further degradation experiments display that the photocatalytic activity can be dramatically affected by the thickness of the outmost rutile layer and the 100 nm thickness exhibits the best performance in all of the TiO_2 thin films. With the increase of the outmost rutile layer, the optical band gap of TiO_2 film displays a systematic decrease slightly. However, the change in photocatalytic activity does not coincide with that in the band gap. The photoresponse and electrochemical properties of the thin films have been characterized to understand the mechanism of the varied photocatalytic activity.
语种：
英文
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A Model to Stabilize CO2 Uptake Capacity during Carbonation-Calcination Cycles and its Case of CaO-MgO
作者：
Zhu, Qiancheng;Zeng, Shibi;Yu, Ying*
期刊：
Environmental Science & Technology ,2017年51(1):552-559 ISSN：0013-936X
通讯作者：
Yu, Ying
作者机构：
[Zhu, Qiancheng; Zeng, Shibi; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
摘要：
Nowadays, capturing anthropogenic CO2 in a highly efficient and cost-effective way is one of the most challenging issues. Herein, the key parameters to stabilize CO2 uptake capacity have been studied based on four kinds of pure calcium oxides (CaO) prepared by a simple calcination method with four different calcium precursors. A simple ideal particle model was proposed to illustrate the uniform distribution of pure CaO, in which the CO2 uptake capacity is positively related with surface area of CaO particles and the stability is opposite to the distance between two CaO particles after carbonation. The adsorption capacity of the best sample with a distance of 398 nm between two CaO particles after carbonation only lost 0.344% per cycle, which is originated from the low possibility of the agglomeration between neighboring particles. On the basis of the proposed model, the composite with magnesium oxide (MgO) distributed uniformly in CaO was fabricated by a simple ball milling method, which possessed an excellent stability with a decay rate of only 3.9% over 100 carbonation-calcination cycles. In this case, MgO played as inert to increase the distance between CaO particles for agglomeration prevention. © 2016 American Chemical Society.
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英文
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Cu nanowires shelled with NiFe layered double hydroxide nanosheets as bifunctional electrocatalysts for overall water splitting
作者：
Yu, Luo;Zhou, Haiqing;Sun, Jingying;Qin, Fan;Yu, Fang;...
期刊：
Energy & Environmental Science ,2017年10(8):1820-1827 ISSN：1754-5692
通讯作者：
Yu, Ying;Chen, Shuo;Ren, Zhifeng
作者机构：
[Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zhou, Haiqing; Chen, Shuo; Yu, Luo; Chen, S; Ren, Zhifeng; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Zhou, Haiqing; Chen, Shuo; Yu, Luo; Chen, S; Ren, Zhifeng; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Qin, Fan; Bao, Jiming] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.
通讯机构：
[Yu, Ying] C;[Chen, S; Ren, ZF] U;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
摘要：
Developing highly active and low-cost electrocatalysts with superior durability for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is a grand challenge to produce hydrogen by electrolysis of water. Here, we report on a facile and scalable approach to fabricate highly efficient three-dimensional (3D) bulk catalysts of core-shell nanostructures, in which few-layer NiFe layered double hydroxide (LDH) nanosheets are grown on Cu nanowire cores supported on Cu foams, toward overall water splitting. Remarkably, benefiting from the 3D hierarchical nanoarchitecture with large surface areas, fast electron transport, and open-channels for effective gas release, the resulting 3D self-standing catalysts exhibit outstanding OER activity as well as excellent HER performance in an alkaline medium. Using them as bifunctional catalysts for overall water splitting, a current density of 10 mA cm-2 was achieved at a voltage of 1.54 V, and 100 mA cm-2 at 1.69 V with excellent durability, which is much better than the benchmark of IrO2(+)//Pt(-) electrodes. Our 3D core-shell electrocatalysts significantly advance the research towards large-scale practical water electrolysis. © The Royal Society of Chemistry 2017.
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英文
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Giant Enhancement of Internal Electric Field Boosting Bulk Charge Separation for Photocatalysis
作者：
Li, Jie;Cai, Lejuan;Shang, Jian;Yu, Ying;Zhang, Lizhi*
期刊：
Advanced Materials ,2016年28(21):4059-4064 ISSN：0935-9648
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Jie; Cai, Lejuan; Shang, Jian] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
关键词：
bulk-charge separation;doping;internal electric field;photocatalysis;water oxidation
摘要：
A study was conducted to demonstrate giant enhancement of internal electric field (IEF) boosting bulk charge separation (BCS) for photocatalysis. The study synthesized C-doped Bi3O4 Cl nanosheets with reported carbon doping strategy. These nanosheets had {001} facets on their top and bottom, {110} facets on their four lateral surfaces, and {010} facets at their four corners. Their elemental mapping images and time-resolved X-ray photoelectron spectroscopy revealed the homogeneous distribution of carbon dopants within Bi3O4.
语种：
英文
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Carbon-Infused MoS2 Supported on TiO2 Nanosheet Arrays for Intensified Anodes in Lithium Ion Batteries
作者：
Li, Guojian;Yu, Luo;Hu, Hao;Zhu, Qiancheng;Wang, Yueyan;...
期刊：
Electrochimica Acta ,2016年212:59-67 ISSN：0013-4686
通讯作者：
Yu, Ying
作者机构：
[Li, Guojian; Zhu, Qiancheng; Hu, Hao; Yu, Ying; Yu, Luo; Wang, Yueyan] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.
关键词：
TiO 2 @MoS 2 /C;TiO 2 nanosheet arrays;carbon infused MoS 2;intensified anodes
摘要：
Graphite anodes in commercialized lithium ion batteries are meeting the bottleneck for future high-performance electronic devices. Strategies has been applied to improve the cycle and rate capacity of the anode active materials. Herein, a two-step hydrothermal approach is presented to synthesize TiO<inf>2</inf>@MoS<inf>2</inf>/C as enhanced anodic electrode. The TiO<inf>2</inf>@MoS<inf>2</inf>/C electrode delivers a satisfying cycle performance of 643.4 mAh/g on average at a current of 100 mA/g upon 100 cycles. The comparison study shows that TiO<inf>2</inf>@MoS<inf>2</inf>/C are superior to its individual part when assembled into batteries. The result also demonstrates that the support from TiO<inf>2</inf>nanosheet arrays is essential to achieve both improved cycle and rate performance. Without TiO<inf>2</inf>scaffold as an intermediate, MoS<inf>2</inf>/C is not able to firmly attach to Ti substrate and tends to be exfoliated upon cycling. Besides, the presence of carbon remarkably improves the poor conductivity of TiO<inf>2</inf>and MoS<inf>2</inf>, which is beneficial to elevate rate capacity at high currents. ©2016 Elsevier Ltd
语种：
英文
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Superior visible light hydrogen evolution of Janus bilayer junctions via atomic-level charge flow steering
作者：
Li, Jie;Zhan, Guangming;Yu, Ying;Zhang, Lizhi*
期刊：
Nature Communications ,2016年7(1):11480 ISSN：2041-1723
通讯作者：
Zhang, Lizhi
作者机构：
[Zhang, Lizhi; Li, Jie; Zhan, Guangming] Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.;[Li, Jie; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanoscience & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Zhang, Lizhi] C;Cent China Normal Univ, Coll Chem, Inst Environm Chem, Key Lab Pesticide & Chem Biol,Minist Educ, Wuhan 430079, Peoples R China.
摘要：
Although photocatalytic hydrogen evolution (PHE) is ideal for solar-to-fuel conversion, it remains challenging to construct a highly efficient PHE system by steering the charge flow in a precise manner. Here we tackle this challenge by assembling 1T MoS2 monolayers selectively and chemically onto (Bi12O17) end-faces of Bi12O17Cl2 monolayers to craft two-dimensional (2D) Janus (Cl2)-(Bi12O17)-(MoS2) bilayer junctions, a new 2D motif different from van der Waals heterostructure. Electrons and holes from visible light-irradiated Bi12O17Cl2 are directionally separated by the internal electric field to (Bi12O17) and (Cl2) end-faces, respectively. The separated electrons can further migrate to MoS2 via Bi-S bonds formed between (Bi12O17) and MoS2 monolayers. This atomic-level directional charge separation endows the Janus bilayers with ultralong carrier lifetime of 3,446 ns and hence a superior visible-light PHE rate of 33 mmol h-1 g-1. Our delineated Janus bilayer junctions on the basis of the oriented assembly of monolayers presents a new design concept to effectively steer the charge flow for PHE.
语种：
英文
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Co-dopant influence on near-infrared luminescence properties of Zn2SnO4:Cr3+, Eu3+ ceramic discs
作者：
Zhang, Yi;Huang, Rui* ;Lin, Zhenxu;Song, Jie;Wang, Xiang;...
期刊：
Journal of Alloys and Compounds ,2016年686:407-412 ISSN：0925-8388
通讯作者：
Huang, Rui;Yu, Ying
作者机构：
[Huang, Rui; Zhang, Yi; Lin, Zhenxu] Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;[Wang, Xiang; Song, Jie; Huang, Rui; Zhang, Yi; Yu, Ying; Song, Chao; Guo, Yanqing] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
通讯机构：
[Huang, Rui] H;[Yu, Ying] C;Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Near-infrared;Optical properties;Persistent luminescence
摘要：
Bright near-infrared (NIR) luminescent ceramic discs of Zn<inf>2</inf>SnO<inf>4</inf>:Cr<sup>3+</sup>, Eu<sup>3+</sup>were synthesized by a solid state method. The phase structure was checked by XRD. The photoluminescence and persistent luminescence decay properties of Cr<sup>3+</sup>, Eu<sup>3+</sup>-codoped samples were studied systematically. The photoluminescence and photoluminescence excitation spectra revealed that the NIR emission (centered at 800 nm) of Cr<sup>3+</sup>was significantly enhanced after the incorporation of Eu<sup>3+</sup>ions, which was attributed to the energy transfer from Eu<sup>3+</sup>ions to Cr<sup>3+</sup>. Moreover, the incorporation of Eu<sup>3+</sup>ions could effectively delay the decay rate and enhance the NIR persistent luminescence. The analysis of persistent decay curves and thermoluminescence spectra indicated that the Eu<sup>3+</sup>ions acting as effective deep-trap centers contributed to improved Cr<sup>3+</sup>NIR persistent luminescence. ©2016 Elsevier B.V. All rights reserved.
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英文
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Enhanced Activity and Stability of Carbon-Decorated Cuprous Oxide Mesoporous Nanorods for CO2 Reduction in Artificial Photosynthesis
作者：
Yu, Luo;Li, Guojian;Zhang, Xiaoshu;Ba, Xin;Shi, Guodong;...
期刊：
ACS CATALYSIS ,2016年6(10):6444-6454 ISSN：2155-5435
通讯作者：
Yu, Ying
作者机构：
[Li, Guojian; Ba, Xin; Zhang, Xiaoshu; Li, Yong; Yu, Ying; Yu, Luo; Shi, Guodong] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;[Wong, Po Keung] Chinese Univ Hong Kong, Sch Life Sci, Shatin, Hong Kong, Peoples R China.;[Yu, Jimmy C.] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Yu, Ying] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
Cu2O mesoporous nanorods;carbon coating;photocatalysis;CO2 reduction;stability;visible light
摘要：
The development of photocatalysts with superior activity and stability to produce organic fuels through CO2 reduction under renewable sunlight is of great significance due to the depletion of fossil fuels and severe environmental problems. In this study, we presented a "hitting three birds with one stone" strategy to synthesize carbon layer coated cuprous oxide (Cu2O) mesoporous nanorods on Cu foils via a facile chemical oxidation and subsequent carbonization method. The thin carbon layer not only works as a protective layer to quench the common photocorrosion problem of Cu2O but also endows the sample a mesoporous and one-dimensional nanorod structure, which can facilitate reactant molecule adsorption and charge carrier transfer. Substantially, the coated samples exhibited remarkably improved stability as well as decent activity for CO2 reduction under visible light irradiation. The optimized sample attained an apparent quantum efficiency of 2.07% for CH4 and C2H4 at λ0 400 nm, and 93% activity remained after six photoreduction cycles under visible light. This work provides a facile strategy to address the stability and activity issues of Cu2O under visible light irradiation, which is presumably suitable for other semiconductors as promising candidates for CO2 reduction in artificial photosynthesis. © 2016 American Chemical Society.
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英文
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Multiple magnification effects of Ce3+ ions on near-infrared persistent luminescence of Crdoped LaAlO3
作者：
Zhang, Yi;Huang, Rui* ;Lin, Zhenxu;Song, Jie;Wang, Xiang;...
期刊：
Optical Materials Express ,2016年6(3):922-928 ISSN：2159-3930
通讯作者：
Huang, Rui
作者机构：
[Zhang, Yi; Yu, Ying; Lin, Zhenxu] Cent China Normal Univ, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Wang, Xiang; Song, Jie; Huang, Rui; Song, Chao; Guo, Yanqing] Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;[Robertson, John; Huang, Rui] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
通讯机构：
[Huang, Rui] H;[Huang, Rui] U;Hanshan Normal Univ, Dept Phys & Elect Engn, Chaozhou 521041, Guangdong, Peoples R China.;Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England.
关键词：
Energy transfer;Ions;Luminescence;Near infrared radiation;Photoluminescence;Ultraviolet radiation
摘要：
Ce<sup>3+</sup>/Cr<sup>3+</sup>co-doped LaAlO<inf>3</inf>for near-infrared (NIR) long lasting phosphors were synthesized through solid-state reaction. Incorporation of Ce<sup>3+</sup>ions into Cr<sup>3+</sup>-doped LaAlO<inf>3</inf>significantly enhanced the NIR persistent luminescence by more than one order of magnitude compared with LaAlO<inf>3</inf>doped with Cr<sup>3+</sup>. Detailed analysis of the photoluminescence, photoluminescence excitation, and Thermo-luminescence spectra, as well as the persistent decay behavior of Ce<sup>3+</sup>/Cr<sup>3+</sup>co-doped LaAlO<inf>3</inf>, indicated that the improvement of NIR persistent luminescence at around 735 nm (Cr<sup>3+</sup>:<sup>2</sup>E→<sup>4</sup>A<inf>2</inf>transition) is not only originated from a persistent energy transfer process from Ce<sup>3+</sup>ions to Cr<sup>3+</sup>ions, but also attributed to the extra efficient traps created by incorporation of Ce<sup>3+</sup>ions. The current work develops an alternative approach toward the efficient NIR Cr<sup>3+</sup>-doped non-gallate longpersistence phosphors. ©2016 Optical Society of America.
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英文
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