Dependence of the CH3OH oxidation activity for a wide range of PtRu alloys: detailed analysis and new views

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DOIResolve DOI: http://doi.org/10.1149/1.1768545
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TypeArticle
Journal titleJournal of the Electrochemical Society
Volume151
Issue8
PagesA1269A1278; # of pages: 9
AbstractUnsupported PtRu alloy powders of a wide range of compositions were prepared at low temperatures by carefully adjusting the preparation procedure. PtRu alloys of essentially the same surface, nominal and bulk composition, were formed up to ca. 46 atom % Ru content. Adsorbed CO stripping voltammetry and CH3OH oxidation characteristics, namely, i-V curves and pseudo-steadystate current density values recorded at constant potentials, were the same as reported for corresponding bulk alloys, suggesting that the electrocatalytic activities of the powders can be compared to bulk alloys. CH3OH oxidation activities obtained for PtRu alloy, Pt, and Ru powders showed the PtRu alloy of 70:30 atom % Pt:Ru composition to exhibit the highest activity independent of the temperature and potential tested ~0.3 and 0.4 V vs. a reversible hydrogen electrode!. The experimental pseudo-steady-state current density values for the CH3OH oxidation reaction were found to show the same dependence on Ru content as theoretical values calculated assuming that an assembly of three neighboring Pt and one Ru site are involved in the oxidation of a CH3OH molecule.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NRC number52173
NPARC number16187142
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Record identifier1cda90a1-2d0c-4034-9696-e17ebeeb5b75
Record created2010-10-07
Record modified2016-05-09
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