用于乙醇电氧化的金纳米线阵列的模板辅助制备
Template-assisted fabrication of gold nanowire arrays for ethanol electro-oxidation.
作者信息
Cui Jiewu, Wu Yucheng, Wang Yan, Zheng Hongmei, Xu Guangqing, Zhang Xinyi
机构信息
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, PR China.
出版信息
J Nanosci Nanotechnol. 2013 Feb;13(2):1149-52. doi: 10.1166/jnn.2013.6034.
Gold nanowires are considered a promising candidate in the area of electrocatalysis because of their extremely high surface-to-volume ratios and other special properties. In this paper, highly ordered gold nanowire arrays have been fabricated by direct electrodeposition utilizing highly ordered anodic aluminum oxide (AAO) templates. The morphology and microstructure of AAO templates and gold nanowire arrays were characterized by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD), respectively. The results showed that the average diameter of gold nanowires was on the order of 80 nm, which was in accordance with the diameter of AAO pores. The electro-oxidation of ethanol on gold nanowire arrays in alkaline medium was measured by cyclic voltammetry. The results indicated that gold nanowire arrays showed excellent electrocatalytic activity and stability towards the electro-oxidation of ethanol, which made gold nanowire arrays an excellent electrocatalyst in the applications of direct ethanol fuel cell.
由于金纳米线具有极高的表面积与体积比以及其他特殊性质，它们被认为是电催化领域中一种很有前景的候选材料。在本文中，利用高度有序的阳极氧化铝（AAO）模板通过直接电沉积制备了高度有序的金纳米线阵列。分别用场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）对AAO模板和金纳米线阵列的形貌与微观结构进行了表征。结果表明，金纳米线的平均直径约为80 nm，这与AAO孔的直径一致。采用循环伏安法测量了碱性介质中乙醇在金纳米线阵列上的电氧化。结果表明，金纳米线阵列对乙醇的电氧化表现出优异的电催化活性和稳定性，这使得金纳米线阵列在直接乙醇燃料电池应用中成为一种优异的电催化剂。
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