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Electrocatalysis

, 2:192 | Cite as

Hydrogen Evolution Electrocatalysis on AgPd(111) Alloys

  • Yvonne Pluntke
  • Ludwig A. KiblerEmail author
Article

Abstract

Recent studies on AuPd(111) alloy surfaces display unexpected hydrogen evolution reaction activities—a unique activity of AuPd alloys with surface fractions of ~20% Pd was found. We investigated if this phenomenon also occurs with AgPd alloys. We first deposited Pd on a Ru(0001) substrate. After annealing, cyclic voltammetry investigations showed the same characteristics as Pd(111) single crystals. During Ag deposition, cyclic voltammetry experiments disclose underpotential deposition of Ag on the Pd film just as on Pd(111). AgPd alloys were formed by further annealing, and strong enrichment of Ag at the surface is observed. Using this approach, we prepared various bulk compositions at a film thickness of ~20 monolayers. Most AgPd alloys show a higher electrocatalytic activity than Ag or Pd alone. The activity trends match those seen with AuPd alloys.

Keywords

Hydrogen evolution reaction AgPd(111) alloys Pd ensembles Cyclic voltammetry 

Notes

Acknowledgments

We thank Dr. John A. Keith and Professor Dieter M. Kolb for helpful discussion and greatly acknowledge financial support by the Fonds der Chemischen Industrie.

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Copyright information

© Springer 2011

Authors and Affiliations

  1. 1.Institute of ElectrochemistryUniversity of UlmUlmGermany

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