A density-functional study of the energetics of H2O dissociation on bimetallic Pt/Ru nanoclusters

Yasuyuki Ishikawa, Robert R. Diaz-Morales, Alejandro Perez, Marius J. Vilkas, Carlos R. Cabrera

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A density-functional study of homolytic and heterolytic O-H bond cleavage in the dehydrogenation reaction of H2Oads has been carried out on ruthenium sites in bimetallic Pt(1 1 1)/Ru nanoclusters of varying surface morphology. The Ru sites are either produced by co-deposition, forming an alloy, or by sequential deposition. The reaction energies and activation barriers for H2Oads dissociation on the Ru sites are estimated. On the basis of the energetics of H2O ads(Ru) dissociation on the Ru sites, the sequentially deposited Pt/Ru bimetallic cluster surface is predicted to be more catalytically active in water activation and COads oxidation than the alloy surface.

Original languageEnglish
Pages (from-to)404-410
Number of pages7
JournalChemical Physics Letters
Volume411
Issue number4-6
DOIs
Publication statusPublished - Aug 15 2005
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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