Platinum-Coated Copper Nanowires with High Activity for Hydrogen Oxidation Reaction in Base

被引：162

作者：

Alia, Shaun M. ^{[1
,2
]}

Pivovar, Bryan S. ^{[2
]}

Yan, Yushan ^{[1
]}

机构：

[1] Univ Delaware, Dept Chem & Biomol Engn, Newark, DE 19716 USA

[2] Natl Renewable Energy Lab, Golden, CO 80401 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2013年 / 135卷 / 36期

关键词：

OXYGEN-REDUCTION REACTIONS; TEMPERATURE FUEL-CELLS; EXCHANGE MEMBRANE; ALKALINE MEDIA; CATALYSTS; ELECTROCATALYSTS; NANOTUBES; EVOLUTION; SURFACES; ELECTROLYTES;

D O I：

10.1021/ja405598a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Platinum (Pt)-coated copper (Cu) nanowires (Pt/CuNWs) are synthesized by the partial galvanic displacement of CuNWs and have a 100 nm diameter and are 25-40 mu m length. Pt/CuNWs are studied as a hydrogen oxidation reaction (HOR) catalyst in base along with Cu templated Pt nanotubes (PtNT (Cu)), a 5% Cu monolayer on a bulk polycrystalline Pt electrode (5% ML Cu/BPPt), BPPt, and carbon supported Pt (Pt/C). Comparison of these catalysts demonstrates that the inclusion of Cu benefited the HOR activity of Pt/CuNWs likely by providing compressive strain on Pt; surface Cu further aids in hydroxyl adsorption, thereby improving the HOR activity of Pt/CuNWs. Pt/CuNWs exceed the area and mass exchange current densities of carbon supported Pt by 3.5 times and 1.9 times.

引用

页码：13473 / 13478

页数：6

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