Platinum-Coated Gold Nanoporous Film Surface: Electrodeposition and Enhanced Electrocatalytic Activity for Methanol Oxidation
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- 作者：Jianbo Jia ; Linyuan Cao ; Zhenhui Wang
- 刊名：Langmuir
- 出版年：2008
- 出版时间：June 3, 2008
- 年：2008
- 卷：24
- 期：11
- 页码：5932 - 5936
- 全文大小：528K
- 年卷期：v.24,no.11(June 3, 2008)
- ISSN：1520-5827
文摘
This report describes the preparation of Pt-nanoparticle-coated gold-nanoporous film (PGNF) on a gold substrate via a simple “green” approach. The gold electrode that has been anodized under a high potential of 5 V is reduced by freshly prepared ascorbic acid (AA) solution to obtain gold nanoporous film electrode. Then the Pt nanoparticle is grown on the electrode by cyclic voltammetry (CV). The resulting PGNF electrode has highly ordered arrangement and large surface area, as verified by scanning electron microscopy (SEM) and CV, suggesting that the nanoporous gold film electrode provides a good matrix for obtaining PGNF with high surface area. Furthermore, the as-prepared PGNF electrode exhibited high electrocatalytic activity toward methanol oxidation in a 0.5 M H2SO4 solution containing 1.5 M methanol. The present novel strategy is expected to reduce the cost of the Pt catalyst remarkably.