期刊
ACS CATALYSIS
卷 5, 期 6, 页码 3779-3785出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b00073
关键词
nanoporous metals; core/shell structure; dealloying methanol oxidation; electrocatalysts; bimetallic Pt catalysts; fuel cells
资金
- JST-CREST Interface Science for Highly Efficient Energy Utilization, JST
- MEXT, Japan
- Thousand Young Talents Program of the Chinese Central Government [0220002102003]
- National Natural Science Foundation of China [21373280]
- Hundred Talents Program at Chongqing University [0903005203205]
We report a simple approach to fabricate aligned bimetallic Pt-Cu microwires with a three-dimensional nanoporous structure, tunable composition, and high catalytic activity by dealloying a dilute Pt3Cu97 precursor. Each microwire possesses inherent ultrafine nanoporous structure with uniformly distributed Pt-Cu alloy ligaments and nanopores with a dimension of similar to 2 nm. Electrochemical measurements manifest that the nanoporous Pt Cu microwires have significantly enhanced electrocatalytic activities compared with a commercial Pt/C nanoparticulate catalyst. With evident advantages of facile preparation and enhanced catalytic performance together with low material costs, the nanoporous Pt-Cu microwires hold great promise as a high-performance catalyst for electrochemical energy conversion.
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