Aligned nanoporous Pt-Cu bimetallic microwires with high catalytic activity toward methanol electrooxidation

H. J. Qiu, X. Shen, J. Q. Wang, A. Hirata, T. Fujita, Y. Wang, M. W. Chen

Research output: Contribution to journalArticle

78 Citations (Scopus)

Abstract

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 ∼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.

Original languageEnglish
Pages (from-to)3779-3785
Number of pages7
JournalACS Catalysis
Volume5
Issue number6
DOIs
Publication statusPublished - 2015 Jun 5

Keywords

  • bimetallic Pt catalysts
  • core/shell structure
  • dealloying
  • electrocatalysts
  • fuel cells
  • methanol oxidation
  • nanoporous metals

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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