Platinum-Ruthenium Nanotubes and Platinum-Ruthenium Coated Copper Nanowires As Efficient Catalysts for Electro-Oxidation of Methanol

被引：154

作者：

Zheng, Jie ^{[1
]}

Cullen, David A. ^{[2
]}

Forest, Robert V. ^{[1
]}

Wittkopft, Jarrid A. ^{[1
]}

Zhuang, Zhongbin ^{[1
]}

Sheng, Wenchao ^{[1
]}

Chen, Jingguang G. ^{[3
]}

Yan, Yushan ^{[1
]}

机构：

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

[2] Oak Ridge Natl Lab, Oak Ridge, TN 37931 USA

[3] Columbia Univ, Dept Chem Engn, New York, NY 10027 USA

来源：

ACS CATALYSIS | 2015年 / 5卷 / 03期

关键词：

methanol fuel cells; electrocatalysis; methanol oxidation reaction; one-dimensional structure; platinum-ruthenium; ENHANCED ELECTROCATALYTIC ACTIVITY; GALVANIC REPLACEMENT REACTION; PROTON-EXCHANGE MEMBRANE; OXYGEN-REDUCTION; PT-RU; FORMIC-ACID; FUEL-CELL; OXIDATION REACTION; ALLOY NANOWIRES; PARTICLES;

D O I：

10.1021/cs501449y

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The sluggish kinetics of methanol oxidation reaction (MOR) is a major barrier to the commercialization of direct methanol fuel cells (DMFCs). In this work, we report a facile synthesis of platinum-ruthenium nanotubes (PtRuNTs) and platinum-ruthenium-coated copper nanowires (PtRu/CuNWs) by galvanic displacement reaction using copper nanowires as a template. The PtRu compositional effect on MOR is investigated; the optimum Pt/Ru bulk atomic ratio is about 4 and surface atomic ratio about 1 for both PtRuNTs and PtRu/CuNWs. Enhanced specific MOR activities are observed on both PtRuNTs and PtRu/CuNWs compared with the benchmark commercial carbon-supported PtRu catalyst (PtRu/C, Hispec 12100). X-ray photoelectron spectroscopy (XPS) reveals a larger extent of electron transfer from Ru to Pt on PtRu/CuNWs, which may lead to a modification of the d-band center of Pt and consequently a weaker bonding of CO (the poisoning intermediate) on Pt and a higher MOR activity on PtRu/CuNWs.

引用

页码：1468 / 1474

页数：7

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