A core-shell nanoporous Pt-Cu catalyst with tunable composition and high catalytic activity

Xingbo Ge, Luyang Chen, Jianli Kang, Takeshi Fujita, Akihiko Hirata, Wei Zhang, Jianhua Jiang, Mingwei Chen*

*この研究の対応する著者

研究成果: Article査読

106 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)4156-4162
ページ数7
ジャーナルAdvanced Functional Materials
23
33
DOI
出版ステータスPublished - 2013 9 6
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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