Geometrically controlled nanoporous PdAu bimetallic catalysts with tunable Pd/Au ratio for direct ethanol fuel cells

L. Y. Chen, N. Chen, Y. Hou, Z. C. Wang, S. H. Lv, T. Fujita, J. H. Jiang, Akihiko Hirata, M. W. Chen

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

We report nanoporous Pd100-xAux (x = 0, 25, 50, 75, 100; np-PdAu) bimetallic catalysts fabricated by electrochemically dealloying isomorphous Pd20-yAuyNi80 (y = 0, 5, 15, 20) precursors. The chemical composition of the nanoporous bimetallic catalysts can be precisely controlled by predesigning Pd/Au ratios in the ternary alloys. Dealloying at an appropriate potential for each alloy can selectively leach Ni away while the Pd and Au remain intact to form a geometrically controllable nanoporous structure. The electrocatalysis of the np-PdAu shows evident dependence on the Au/Pd atomic ratio, and the np-Pd75Au25 bimetallic catalyst shows superior electrocatalytic performance toward ethanol electrooxidation in comparison with commercial Pt/C, np-Pd, and other np-PdAu alloys. Since there are no obvious geometric shape and pore size disparities among the np-PdAu samples, the dealloyed catalysts also provide an ideal system to explore the chemical origins of the excellent catalytic properties of bimetallic catalysts.

Original languageEnglish
Pages (from-to)1220-1230
Number of pages11
JournalACS Catalysis
Volume3
Issue number6
DOIs
Publication statusPublished - 2013 Jun 25
Externally publishedYes

Fingerprint

Direct ethanol fuel cells (DEFC)
Catalysts
Electrocatalysis
Ternary alloys
Electrooxidation
Pore size
Ethanol
Chemical analysis

Keywords

  • bimetallic catalysis
  • dealloying
  • direct ethanol fuel cell
  • nanoporous alloy
  • Pd-Au catalyst
  • surface electronic structure

ASJC Scopus subject areas

  • Catalysis

Cite this

Chen, L. Y., Chen, N., Hou, Y., Wang, Z. C., Lv, S. H., Fujita, T., ... Chen, M. W. (2013). Geometrically controlled nanoporous PdAu bimetallic catalysts with tunable Pd/Au ratio for direct ethanol fuel cells. ACS Catalysis, 3(6), 1220-1230. https://doi.org/10.1021/cs400135k

Geometrically controlled nanoporous PdAu bimetallic catalysts with tunable Pd/Au ratio for direct ethanol fuel cells. / Chen, L. Y.; Chen, N.; Hou, Y.; Wang, Z. C.; Lv, S. H.; Fujita, T.; Jiang, J. H.; Hirata, Akihiko; Chen, M. W.

In: ACS Catalysis, Vol. 3, No. 6, 25.06.2013, p. 1220-1230.

Research output: Contribution to journalArticle

Chen, LY, Chen, N, Hou, Y, Wang, ZC, Lv, SH, Fujita, T, Jiang, JH, Hirata, A & Chen, MW 2013, 'Geometrically controlled nanoporous PdAu bimetallic catalysts with tunable Pd/Au ratio for direct ethanol fuel cells', ACS Catalysis, vol. 3, no. 6, pp. 1220-1230. https://doi.org/10.1021/cs400135k
Chen, L. Y. ; Chen, N. ; Hou, Y. ; Wang, Z. C. ; Lv, S. H. ; Fujita, T. ; Jiang, J. H. ; Hirata, Akihiko ; Chen, M. W. / Geometrically controlled nanoporous PdAu bimetallic catalysts with tunable Pd/Au ratio for direct ethanol fuel cells. In: ACS Catalysis. 2013 ; Vol. 3, No. 6. pp. 1220-1230.
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