Electrolyzer with hierarchical transition metal sulfide and phosphide towards overall water splitting
作者：
Huang, C.;Cheng, S.;Yu, L.;Zhang, W.;Zhou, J.;...
期刊：
Materials Today Physics ,2019年11:100162 ISSN：2542-5293
通讯作者：
Yu, Y.
作者机构：
[Yu, Y.; Cheng, S.; Huang, C.; Yu, L.; Zhang, W.; Zhou, J.; Zhang, Y.] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.;[Yu, L.] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Yu, L.] Univ Houston, TcSUH, Houston, TX 77204 USA.
通讯机构：
[Yu, Y.] C;Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Peoples R China.
关键词：
Active sites;Cu3P@Co2P;CuS@CoS2;Intrinsic activity;Water splitting
摘要：
Transition metal sulfide (TMS) and phosphide (TMP) have been considered as efficient catalysts for electrochemical water splitting. Here, we have reported an effective strategy to synthesize TMS- and TMP-assembled hierarchical anode (CuS@CoS2) and cathode (Cu3P@Co2P) for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), respectively. It is found that the three-dimensional (3D) hierarchical electrodes not only provide a large number of active sites to promote the apparent catalytic activity, but also present tuned valence state of Co, which enhances the intrinsic activity of the active sites. Therefore, the CuS@CoS 2 anode possesses excellent OER activity with an overpotential of 230 mV at a current density of 10 mA/cm(2), and the Cu3P@Co2P cathode exhibits good HER performance with a low overpotential of 95 mV at a current density of 10 mA/cm(2). Impressively, the CuS@CoS2//Cu3P@Co2P electrolyzer deliver a current density of 10 mA/cm(2) at a cell voltage of 1.55 V for overall water splitting, which is better than most reported TMS and TMP based catalysts. (C) 2019 Elsevier Ltd. All rights reserved.
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英文
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Self-supported ultrathin bismuth nanosheets acquired by: In situ topotactic transformation of BiOCl as a high performance aqueous anode material
作者：
Zhu, Qiancheng;Cheng, Mingyu;Yang, Xianfeng;Zhang, Bing;Wan, Zhanzi;...
期刊：
Journal of Materials Chemistry A ,2019年7(12):6784-6792 ISSN：2050-7488
通讯作者：
Yu, Ying
作者机构：
[Xiao, Qin; Zhu, Qiancheng; Zhang, Bing; Wan, Zhanzi; Yu, Ying; Cheng, Mingyu] Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China.;[Yang, Xianfeng] South China Univ Technol, Analyt & Testing Ctr, Guangzhou 510640, Guangdong, 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：
Aqueous rechargeable batteries are attractive because of their low cost, high operational safety and environmental benignity. Bismuth (Bi) with a highly reversible redox reaction and suitable negative working window has been investigated as a promising anode material recently. However, reported Bi anodes are still far from satisfactory because of their limited capacity and poor stability. Herein, self-supported ultrathin Bi nanosheets have been acquired by a very simple strategy of in situ topotactic transformation using BiOCl as the primary template (named T-BiNS). According to theoretical calculation, the space that T-BiNS has left after the release of O and Cl atoms is sufficient for the reversible charge/discharge process of Bi ↔ Bi2O3. The huge space and the unique structure enhance rapid electron transfer, reduce the activation energy and improve the stability. As such, T-BiNS shows a high capacity of 366 mA h g-1 (almost reaching a theoretical capacity of 384.7 mA h g-1) and good stability with a capacity retention of 82% after 5000 cycles. Finally, a NiCo2O4//T-BiNS full battery is fabricated, which exhibits a high energy density of 116 W h kg-1. © 2019 The Royal Society of Chemistry.
语种：
英文
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Nickel phosphide based hydrogen producing catalyst with low overpotential and stability at high current density
作者：
Chen, Weiwu;Mishra, Ishwar Kumar;Qin, Zhaojun;Yu, Luo;Zhou, Haiqing;...
期刊：
Electrochimica Acta ,2019年299:756-761 ISSN：0013-4686
通讯作者：
Wang, Zhiming M.;Song, Hai-Zhi;Ren, Zhifeng
作者机构：
[Wenya, Gideon Evans; Wang, Zhiming M.; Chen, Weiwu; Qin, Zhaojun; Song, Hai-Zhi] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China.;[Chen, Weiwu; Mishra, Ishwar Kumar; Zhang, Fanghao; Zhou, Haiqing; Chen, Shuo; Yu, Luo; Sun, Jingying; Ren, Zhifeng] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Chen, Weiwu; Mishra, Ishwar Kumar; Zhang, Fanghao; Zhou, Haiqing; Chen, Shuo; Yu, Luo; Sun, Jingying; Ren, Zhifeng] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Yu, Ying; Yu, Luo] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Zhou, Haiqing] Hunan Normal Univ, Dept Phys, Changsha 410081, Hunan, Peoples R China.
通讯机构：
[Wang, ZMM; Song, HZ; Ren, Zhifeng] U;Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Sichuan, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.
关键词：
Ni5P4/NiP2;Water splitting;Hierarchical;HER;Electrocatalysts
摘要：
Hydrogen has promise as a good future alternative to fossil fuels. Electrochemical water splitting is an environmentally friendly way to produce hydrogen, but high overpotentials and cost are the main limitations to the application of electrocatalysts in large-scale hydrogen production. Here, an inexpensive catalyst composed of Ni5P4/NiP2 nanoparticles on Ni5P4/NiP2 nanosheets was prepared by a simple chemical vapor deposition method to increase the active catalytic sites. This nickel phosphide exhibits an overpotential of 35 mV at a current density of 10 mA cm(-2) in an acidic condition, outperforming other reported nickel phosphides. Additionally, it shows great stability at a high current density of 1200 mA cm(-2), which is very important for large-scale applications. Furthermore, this sample shows pH universality, with good performance in both acidic and alkaline electrolytes. This work advances nickel phosphide as an efficient catalyst for the hydrogen evolution reaction in water splitting. Published by Elsevier Ltd.
语种：
英文
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Visible-light driven CO2 reduction coupled with water oxidation on Cl-doped Cu2O nanorods
作者：
Yu, Luo;Ba, Xin;Qiu, Ming* ;Li, Yifei;Shuai, Ling;...
期刊：
Nano Energy ,2019年60:576-582 ISSN：2211-2855
通讯作者：
Qiu, Ming;Yu, Ying;Ren, Zhifeng
作者机构：
[Zhang, Wei; Ba, Xin; Li, Yifei; Yu, Ying; Yu, Luo; Shuai, Ling; Qiu, Ming] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Yu, Luo; Ren, Zhifeng] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Yu, Luo; Ren, Zhifeng] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Ba, Xin] Hubei Inst Qual Supervis & Inspect, Wuhan 430061, Hubei, Peoples R China.
通讯机构：
[Qiu, M; Yu, Y] C;[Ren, Zhifeng] 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：
Band structure;Cl-doped Cu 2 O;CO 2 reduction;Density functional theory;H 2 O oxidation;Visible-light irradiation
摘要：
Visible-light driven overall conversion of CO 2 and H 2 O into chemical fuels and O 2 is a challenging but promising reaction for artificial photosynthesis. Here we demonstrate Cl-doped Cu 2 O nanorods for photocatalytic CO 2 reduction conjugated with H 2 O oxidation under visible-light irradiation. Cl-doping optimizes the band structure of Cu 2 O, resulting in a more positive valence-band position for H 2 O oxidation, and promotes CO 2 adsorption capacity as well as separation and transfer efficiency of photogenerated charge carriers. Consequently, the Cl-doped Cu 2 O shows excellent photocatalytic CO 2 reduction performance accompanied by favorable H 2 O oxidation ability under visible-light irradiation. The best sample achieves an apparent quantum efficiency of 2.2% with 1.13% for CO and 1.07% for CH 4 at 400 nm and demonstrates superior stability. Density functional theory calculations further reveal that Cl-doped Cu 2 O is beneficial for the transformation of CO 2 into the intermediates of *COOH, *CO, and *CH 3 O, which contributes to the enhanced activity of CO and CH 4 production. Additionally, Cl-doped Cu 2 O shows stronger affinity toward the *CO intermediate, which tends to be protonated and ultimately transforms into CH 4 , leading to higher selectivity of CH 4 than that of pure Cu 2 O. This work validates an effective strategy to engineer Cu 2 O for visible-light driven overall conversion of CO 2 reduction and H 2 O oxidation. © 2019
语种：
英文
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A novel H2O2-assisted method to fabricate Li4Ti5O12/TiO2 materials for high-performance energy storage
作者：
Zhou, Jianqing;Zhu, Qiancheng;Hu, Hao;Chen, Wenjuan;Yu, Ying*
期刊：
Electrochimica Acta ,2018年281:142-151 ISSN：0013-4686
通讯作者：
Yu, Ying
作者机构：
[Zhu, Qiancheng; Hu, Hao; Chen, Wenjuan; 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：
Hydrogen peroxide;Spinel Li4Ti5O12;Commercial titania;Low temperature;Energy storage
摘要：
Spinel Li4Ti5O12 known as a "zero-strain" anode material for Li-ion battery has attracted much attention because of its superior safety and stability. Herein, we report a novel H2O2-assisted one-step hydrothermal method to synthesize different ratio Li4Ti5O12/TiO2 composites with the same amount of raw materials. For the first time, Li4Ti5O12 was prepared directly from commercial titania with the presence of H2O2, and different proportion Li4Ti5O12/TiO2 composites were fabricated only by adjusting the amount of H2O2. The reaction mechanism of the novel H2O2-assisted method was clearly investigated, and H2O2 plays a crucial role in the formation of intermediate Li1.81H0.19Ti2O5 center dot 2H(2)O. Further, the electrochemical performance of different ratio Li4Ti5O12/TiO2 composites have been investigated. This facile method is also applicable for the preparation of Na2Ti6O13/TiO2 material, and provides us the new way to fabricate composite materials. (c) 2018 Elsevier Ltd. All rights reserved.
语种：
英文
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Water splitting by electrolysis at high current densities under 1.6 volts
作者：
Zhou, Haiqing;Yu, Fang;Zhu, Qing;Sun, Jingying;Qin, Fan;...
期刊：
Energy & Environmental Science ,2018年11(10):2858-2864 ISSN：1754-5692
通讯作者：
Chen, Shuo;Ren, Zhifeng;Yu, Ying
作者机构：
[Zhou, Haiqing; Chen, Shuo; Chen, S; Ren, Zhifeng; Zhu, Qing; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Zhou, Haiqing; Chen, Shuo; Chen, S; Ren, Zhifeng; Zhu, Qing; Sun, Jingying; Yu, Fang] Univ Houston, TcSUH, Houston, TX 77204 USA.;[Zhou, Haiqing; Yu, Fang] Hunan Normal Univ, Sch Phys & Elect, Minist Educ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[Qin, Fan; Bao, Jiming; Yu, Luo] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA.;[Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
通讯机构：
[Chen, S; Ren, ZF] U;[Yu, Ying] C;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, TcSUH, Houston, TX 77204 USA.;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.
摘要：
Splitting water into hydrogen and oxygen by electrolysis using electricity from intermittent waste heat, wind, or solar energies is one of the easiest and cleanest methods for high-purity hydrogen production and an effective way to store the excess electrical power. The key dilemma for efficient large-scale production of hydrogen by splitting of water via the hydrogen and oxygen evolution reactions (HER and OER, respectively) is the high overpotential required, especially for the OER. We report an exceptionally active and durable OER catalyst yielding current densities of 500 and 1000 mA cm-2 at overpotentials of only 259 mV and 289 mV in alkaline electrolyte, respectively, fulfilling the commercial criteria of the OER process. Together with a good HER catalyst, we have achieved the commercially required current densities of 500 and 1000 mA cm-2 at 1.586 and 1.657 V, respectively, with very good stability, dramatically lower than any previously reported voltage. This discovery sets the stage for large-scale hydrogen production by water splitting using excess electrical power whenever and wherever available. © 2018 The Royal Society of Chemistry.
语种：
英文
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缺陷与掺杂对CdS光催化特性影响的第一性原理研究
作者：
刘如军;余颖
作者机构：
湛江师范学院信息科学与技术学院,广东湛江,524048;华中师范大学纳米科技研究院,湖北武汉,430079
会议名称：
中国化学会第十二届全国量子化学会议
会议时间：
2014-06-12
会议地点：
中国山西太原
会议论文集名称：
中国化学会第十二届全国量子化学会议论文摘要集
摘要：
为提高半导体CdS的光催化活性和稳定性,研究了基于密度泛函理论的空位及金属掺杂对CdS的光学特性及其稳定性的影响。计算结果表明,S空位的引入可引起CdS带隙变宽,产生吸收光谱蓝移,使CdS可见光稳定性有所提高；而掺杂Ga则可令价带有所下移,CdS氧化降解有机污染物能力增强。研究表明,通过引入适当浓度S空位和金属掺杂,可促进CdS的光催化活性及其稳定性。
语种：
中文
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Photocatalytic reduction of CO 2 to CO over copper decorated g-C 3 N 4 nanosheets with enhanced yield and selectivity
作者：
Shi, Guodong;Yang, Lin;Liu, Zhuowen;Chen, Xiao;Zhou, Jianqing;...
期刊：
Applied Surface Science ,2018年427:1165-1173 ISSN：0169-4332
通讯作者：
Yu, Ying
作者机构：
[Yang, Lin; Chen, Xiao; Yu, Ying; Shi, Guodong; Liu, Zhuowen; 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：
CO 2 reduction;Cu decoration;g-C 3 N 4;Photocatalysis
摘要：
Photocatalytic reduction of CO 2 to fuel has attracted considerable attention due to the consumption of fossil fuels and serious environmental problems. Although there are many photocatalysts reported for CO 2 reduction, the improvement of activity and selectivity is still in great need of. In this work, a series of Cu nanoparticle decorated g-C 3 N 4 nanosheets with different Cu loadings were fabricated by a facile secondary calcination and subsequent microwave hydrothermal method. The designed catalysts shown good photocatalytic activity and selectivity for CO 2 reduction to CO. The optimal sample exhibited a 3-fold augmentation of the CO yield in comparison with pristine g-C 3 N 4 under visible light. It is revealed that with the loading of Cu nanoparticles, the resulting photocatalyst possessed an improved charge carrier transfer and separation efficiency as well as increased surface reactive sites, resulting in a significant enhancement of CO yield. It is anticipated that the designed Cu/C 3 N 4 photocatalyst may provide new insights for two dimensional layer materials and non-noble particles applied to CO 2 reduction. © 2017 Elsevier B.V.
语种：
英文
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Robust and selective electrochemical reduction of CO2: The case of integrated 3D TiO2@MoS2 architectures and Ti-S bonding effects
作者：
Yu, Luo;Xie, Yunlong* ;Zhou, Jianqing;Li, Yong;Yu, Ying* ;...
期刊：
Journal of Materials Chemistry A ,2018年6(11):4706-4713 ISSN：2050-7488
通讯作者：
Xie, Yunlong;Yu, Ying;Ren, Zhifeng
作者机构：
[Xie, YL; Yu, Ying; Xie, Yunlong; Li, Yong; Yu, Luo; Zhou, Jianqing] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Yu, Luo; Ren, Zhifeng] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Yu, Luo; Ren, Zhifeng] Univ Houston, TcSUH, Houston, TX 77204 USA.
通讯机构：
[Xie, YL; Yu, Y] C;[Ren, Zhifeng] 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 efficient and affordable catalysts toward electrochemical reduction of CO2 to valuable chemicals is of great significance for energy and environmental sustainability, which can be efficaciously achieved by catalyst structure steering. In this study, we propose an ingenious strategy to modulate MoS2 favorable for CO2 reduction by fabricating an integrated three-dimensional (3D) TiO2@MoS2 architecture containing Ti-S bonds, the formation of which, revealed by density functional theory calculations, has changed the electric properties of the MoS2 layer and the adsorption characters of Mo exposed edges. The modulated MoS2 is vigorous for CO2 reduction due to the decrease of both the binding energy of CO2 and the energy barriers of CO2 reduction reaction pathways. Experimentally, the integrated 3D TiO2@MoS2 architectures can act as efficient and stable catalysts for selective reduction of CO2 to CO. The optimized composite showed a negligible onset overpotential of 100 mV for CO formation in KHCO3 solution, and a maximum faradaic efficiency of ∼82% for CO at -0.7 V vs. RHE with a large partial current density for CO of 68 mA cm-2. Additionally, the integrated 3D electrodes exhibited superior stability during CO2 reduction. This study will shed light on the modification of electrocatalysts for efficient CO2 reduction through structure steering. © 2018 The Royal Society of Chemistry.
语种：
英文
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Hydrogen plasma reduced potassium titanate as a high power and ultralong lifespan anode material for sodium-ion batteries
作者：
Yang, Ze;Sun, Jingying;Xie, Yunlong;Kaur, Pawanjit;Hernandez, Joseph;...
期刊：
Journal of Materials Chemistry A ,2018年6(44):22037-22042 ISSN：2050-7488
通讯作者：
Chen, Shuo
作者机构：
[Kaur, Pawanjit; Chen, Shuo; Hernandez, Joseph; Yang, Ze; Sun, Jingying; Ni, Yizhou; Varghese, Oomman K.] Univ Houston, Dept Phys, Houston, TX 77204 USA.;[Chen, Shuo; Yang, Ze; Sun, Jingying; Ni, Yizhou] Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.;[Xie, Yunlong; Yu, Ying] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Hubei, Peoples R China.;[Huang, Yunhui] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China.
通讯机构：
[Chen, Shuo] U;Univ Houston, Dept Phys, Houston, TX 77204 USA.;Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA.
摘要：
The abundance and low cost of sodium potentially enable application of sodium ion batteries for grid-scale energy storage. Consequently, anode materials with high power, long lifespan, and safe operation are highly desired. In this work, we successfully fabricate black K2Ti6O13 nanowires as an anode material that exhibits the desired properties. The black K2Ti6O13 nanowires are prepared via a hydrothermal method followed by post calcination and final hydrogen plasma treatment. The black K2Ti6O13 anode delivers a high reversible capacity of 249 mA h g−1. Impressively, it could sustain 20 000 cycles without apparent capacity fade. The first-principles calculation results suggest that the electrical conductivity of K2Ti6O13 would be improved while the sodiation energy barrier could be reduced after introducing oxygen vacancies. © The Royal Society of Chemistry.
语种：
英文
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Synergistic effect of adsorption and visible-light photocatalysis for organic pollutant removal over BiVO4/carbon sphere nanocomposites
作者：
Wang, Xiaotong;Zhou, Jianqing;Zhao, Shuo;Chen, Xiao;Yu, Ying*
期刊：
Applied Surface Science ,2018年453:394-404 ISSN：0169-4332
通讯作者：
Yu, Ying
作者机构：
[Wang, Xiaotong; Chen, Xiao; Yu, Ying; Zhao, Shuo; 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：
Adsorption kinetics;BiVO 4;Carbon sphere;Photocatalysis
摘要：
Photocatalysis and adsorption are considered as the effective methods to remove organic pollutants in wastewaters. In this study, a novel composite, BiVO 4 with reasonable bandgap (∼2.4 eV) and good photocatalytic performance combined with carbon sphere, is successfully prepared, which can be used to remove organic pollutants by the synergistic effect of adsorption and photocatalysis. In the composite, the carbon sphere has good ability to adsorb the pollutants, which is beneficial for them to be further photodegraded. Besides, it has good conductivity, which can facilitate the transfer of photogenerated electrons, thus reducing the recombination of photogenerated carriers for photocatalytic performance improvement. It is found that the composite with optimized ratio shows good adsorption and photocatalytic performance. The photodegradation rate for methylene blue over the best composite under visible-light irradiation is 11.56 times higher than that over pure BiVO 4 and that for rhodamine B is 4.42 times higher. The study provides a promising photocatalyst to be used for organic pollutant removal in large scale. © 2018 Elsevier B.V.
语种：
英文
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Amorphous NiFe layered double hydroxide nanosheets decorated on 3D nickel phosphide nanoarrays: a hierarchical core-shell electrocatalyst for efficient oxygen evolution
作者：
Yu, Luo;Zhou, Haiqing;Sun, Jingying;Mishra, Ishwar Kumar;Luo, Dan;...
期刊：
Journal of Materials Chemistry A ,2018年6(28):13619-13623 ISSN：2050-7488
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.;[Luo, Dan; Mishra, Ishwar Kumar; Zhou, Haiqing; Chen, Shuo; Yu, Luo; Chen, S; Ren, Zhifeng; Sun, Jingying; Yu, Fang] Univ Houston, Dept Phys, TcSUH, 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, TcSUH, Houston, TX 77204 USA.
摘要：
The rational design of efficient and earth-abundant electrocatalysts for the oxygen evolution reaction (OER) plays a paramount role in hydrogen production by water electrolysis. Here we report a 3D hierarchical core-shell nanostructured OER electrocatalyst, in which amorphous NiFe layered double hydroxide (LDH) nanosheets are decorated on 3D conductive nickel phosphide nanoarrays. The integrated 3D core-shell electrode simultaneously offers excellent electrical conductivity for fast electron transfer, a large surface area with numerous active edge sites, and a hierarchical nanostructure for rapid release of gas bubbles, thus contributing to outstanding catalytic performance: low overpotentials (197, 243, and 283 mV for current densities of 10, 100, and 300 mA cm<sup>-2</sup>, respectively), a small Tafel slope (46.6 mV dec<sup>-1</sup>), and superior stability, which are better than those of almost all reported LDH-based OER catalysts. When this hybrid catalyst is combined with nickel phosphide for overall water splitting, the two-electrode cell achieves current densities of 10 mA cm<sup>-2</sup> at 1.52 V and 100 mA cm<sup>-2</sup> at 1.68 V in alkaline media, which are even superior to those of benchmark IrO<inf>2</inf> and Pt. This work paves an effective approach to design 3D hierarchical hybrid electrocatalysts for energy conversion and storage.<br/> ©The Royal Society of Chemistry.
语种：
英文
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用于CO2捕获和光催化转化的金属氧化物研究
作者：
余颖;朱前程;余罗;巴鑫
作者机构：
[余颖; 朱前程; 余罗; 巴鑫] 华中师范大学物理科学与技术学院纳米科技研究所
会议名称：
第十一届全国环境催化与环境材料学术会议
会议时间：
2018-07-20
会议地点：
中国辽宁沈阳
关键词：
CaO捕获剂;MgO改性;Cu2O光催化剂;性能增强
摘要：
<正>众所周知,将CO2进行捕获并将其转化为燃料是解决由温室效应引起的环境危机的有效途径,其中的关键是高效的捕获剂和催化剂研制。虽然相关领域已经有很多报导,但是现有捕获剂和催化剂的活性和稳定性离实际应用还有较远的距离。大量的研究表明金属氧化物如CaO是成本低廉、吸收CO2能力较强捕获剂,但是其吸收CO2的活性和循环稳定性还有待于提高,为了解决该问题,我们在制备出四种不同CaO的基础上,提出了
语种：
中文
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Design of multidimensional nanocomposite material to realize the application both in energy storage and electrocatalysis
作者：
Qiancheng Zhu;Desheng Cai;Xiaoqin Lan;Guodong Shi;Kai Jin;...
期刊：
科学通报(英文版) ,2018年63(3):152-154 ISSN：2095-9273
通讯作者：
Yu, Ying(yuying01@mail.ccnu.edu.cn)
作者机构：
[Qiancheng Zhu; Wenjuan Chen; Guodong Shi; Ying Yu; Kai Jin; Xiaoqin Lan; Desheng Cai; Jianqing Zhou] Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan, 430079, China
通讯机构：
[Ying Yu] I;Institute of Nanoscience and Nanotechnology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China
关键词：
存储系统;精力;材料设计;应用程序;多维;锂离子电池;存储设备;电子学
摘要：
The development of clean, sustainable and renewable energy storage systems is in urgent need with the fast-growing energy demand in the areas of electric vehicles and mobile electronics etc. Lithium-ion batteries(LIBs) have been deemed to be the most promising energy storage devices for their high power density, long cycle life and fast charge-discharge rates. Transition metal oxides, such as FeO_x, CoO_x, NiO, MnO_2 and SnO_2 etc. have been intensively studied as promising anode materials due to their high theoretical specific capacities, environmental benignity and low cost. Recently, ternary metal oxides such as NiCo_2O_4, ZnCo_2O_4, CuCo_2O_4, and ZnMn_2O_4 etc. have been reported to exhibit high electrochemical activities because of their complex chemical composition and the synergic effects of multiple metal species. However, ternary metal oxides also have conductivity issue although their conductivity is better than nonmetal oxides. Some strategies have been performed to solve these problems by structure improvement and the incorporation of carbon nanotubes, graphene, and metal nanoparticles(NPs) and so on. But the capacity and especially the cycle performance for metal oxides or ternary metal oxides are still limited.
语种：
英文
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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.
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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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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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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.
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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