Nanoporous PdNi bimetallic catalyst with enhanced electrocatalytic performances for electro-oxidation and oxygen reduction reactions

Luyang Chen, Hai Guo, Takeshi Fujita, Akihiko Hirata, Wei Zhang, Akihisa Inoue, Mingwei Chen

Research output: Contribution to journalArticle

194 Citations (Scopus)

Abstract

A nanoporous PdNi (np-PdNi) bimetallic catalyst fabricated by electrochemically dealloying a Pd20Ni80 alloy in an acid solution is reported. Residual Ni in the nanoporous alloy can be controlled by tuning dealloying potentials and the electrocatalysis of the np-PdNi shows evident dependence on Ni concentrations. With ∼9 at.% Ni, the np-PdNi bimetallic catalyst presents superior electrocatalytic performances in methanol and formic acid electro-oxidation as well as oxygen reduction in comparison with commercial Pd/C and nanoporous Pd (np-Pd). The excellent electrocatalytic properties of the dealloyed np-PdNi bimetallic catalyst appear to arise from the combined effect of unique bicontinuous nanoporosity and bimetallic synergistic action. The nanoporous PdNi (np-PdNi) bimetallic catalyst is fabricated by electrochemical dealloying of a Pd20Ni80 alloy. Residual Ni in the nanoporous alloy can be controlled by tuning dealloying potentials and the eletrocatalysis of the np-PdNi shows evident dependence on the Ni concentrations. The superior electrocatalytic properties of the dealloyed np-PdNi bimetallic catalyst appear to arise from the combined effect of unique bicontinuous nanoporosity and bimetallic synergistic action.

Original languageEnglish
Pages (from-to)4364-4370
Number of pages7
JournalAdvanced Functional Materials
Volume21
Issue number22
DOIs
Publication statusPublished - 2011 Nov 22
Externally publishedYes

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Keywords

  • electrooxidation
  • nanoporous metal
  • oxygen reduction
  • palladium-nickel catalyst

ASJC Scopus subject areas

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

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