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- Title
A Core-Shell Nanoporous Pt-Cu Catalyst with Tunable Composition and High Catalytic Activity.
- Authors
Ge, Xingbo; Chen, Luyang; Kang, Jianli; Fujita, Takeshi; Hirata, Akihiko; Zhang, Wei; Jiang, Jianhua; Chen, Mingwei
- Abstract
Composition-controlled fabrication of bimetallic catalysts is of significance in electrochemical energy conversion and storage. A novel nanoporous Pt-Cu bimetallic catalyst with a Pt skin and a Pt-Cu core, fabricated by electrochemically dealloying a bulk Pt-Cu binary alloy using a potential-controlled approach, is reported. The Pt/Cu ratio of the dealloyed nanoporous catalyst can be readily adjusted in a wide composition range by only controlling dealloying potential. The electro-catalytic performance of the nanoporous Pt-Cu catalyst shows evident dependence on Pt/Cu ratio although the surfaces of all the nanoporous catalysts are characterized to be covered by pure Pt. With optimal compositions, the dealloyed nanoporous Pt-Cu catalyst possesses enhanced electrocatalytic activities toward oxygen reduction reaction and formic acid oxidation in comparison with the commercial Pt/C catalyst.
- Subjects
NANOPOROUS materials; CATALYSTS; ENERGY conversion; ENERGY storage; FORMIC acid; OXIDATION
- Publication
Advanced Functional Materials, 2013, Vol 23, Issue 33, p4156
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201300114