CH3OH oxidation activities of an unsupported PtxRuy powder catalyst before and after different electrochemical treatments

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DOIResolve DOI: http://doi.org/10.1149/1.3505463
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TypeArticle
Proceedings titleECS Transactions
Conference217th ECS Meeting, April 25-30, 2010, Vancouver, Canada
ISSN1938-6737
1938-5862
Volume28
Issue30
Pages91104; # of pages: 14
AbstractAn unsupported Pt75Ru25 powder was synthesized by co-reducing the corresponding precursor salts rapidly. An alloy powder of Pt75Ru25 composition was formed in this manner. The catalyst powders were subjected to various electrochemical treatments in either 0.5 M H2SO4 or 0.5 M CH3OH + 0.5 M H2SO4 solutions. Applying specific electrochemical treatments in respect to time (e.g., the potential cycling number) relative to the E+ value result in either a decrease or increase in the CH3OH oxidation activity of this catalyst. The differently treated catalyst powders were further studied using EDX, XPS and CO adsorbed (COads) stripping voltamograms and transients. The results suggest that removal of surface Ru-oxides result in an increase in CH3OH electrooxidation activity, while extensive loss of Ru from the catalyst surface results in a decrease in CH3OH oxidation activity. Refluxing this asprepared catalyst powder in an excess of boiling 0.5 M H2SO4 did neither result in the removal of the surface Ru-oxides nor improve the CH3OH oxidation activity.
Publication date
PublisherThe Electrochemical Society
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
NRC number52309
NPARC number16350474
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Record identifier0180fc0a-87ae-4afc-8f44-09db944a0966
Record created2010-11-08
Record modified2016-05-09
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