期刊论文

Jia Fa-Long

中文

无机化学学报

1001-4861

2007

23

11

1912-1916

10.3321/j.issn:1001-4861.2007.11.012

20503009:国家自然科学基金 20673041:国家自然科学基金

本校为第一且通讯机构

采用合金化/去合金化法在金电极表面制备出一层具有纳米孔结构的金膜,其孔径约为15 nm.该方法首先在金电极表面电沉积一层锌,再通过热处理形成合金层,最后利用化学去合金化法去除合金中的锌.X射线衍射(XRD)结果表明在合金化过程中,锌扩散进入金基体并形成了金-锌合金层.利用场发射扫描电子显微镜(FESEM)对去合金化得到的纳米孔金膜进行了形貌的表征,结果表明合金化条件对样品的纳米结构有明显的影响.电化学测试结果表明,经合金化/去合金化处理的金电极,其表面粗糙度有明显的提高.这种金电极对甲醇具有较高的催化氧化活性,在0.3 mol·L-1甲醇的KOH溶液中,甲醇的氧化峰电流密度高达2.02 mA·cm-2....

Nanoporous gold film with pore size of ∼15 nm was fabricated directly on the surface of gold by an alloying/dealloying process, involving the electrodeposition of Zn on gold surface, thermal treatment to form alloy layer, and chemical dealloying of Zn in the alloy. X-ray diffraction (XRD) results show the deposited Zn into Au phase and an Au-Zn alloy layer formation during the alloying step. The morphologies of the samples were characterized by field emission scanning electron microscope (FESEM). It was observed that the thermal alloying condi...