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

Research output: Contribution to journalArticle

90 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)4156-4162
Number of pages7
JournalAdvanced Functional Materials
Volume23
Issue number33
DOIs
Publication statusPublished - 2013 Sep 6
Externally publishedYes

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Keywords

  • Bimetallic catalysts
  • Catalysis
  • Dealloying
  • Fuel cells
  • Nanoporous metals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Condensed Matter Physics
  • Electrochemistry

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