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The effects of ruthenium-oxidation states on Ru dissolution in PtRu thin-film electrodes

Published online by Cambridge University Press:  23 February 2011

Yejun Park ,
Byungjoo Lee ,
Chunjoong Kim ,
Yuhong Oh ,
Seunghoon Nam  and
Byungwoo Park
Byungwoo Park*
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
*
a) Address all correspondence to this author. e-mail: byungwoo@snu.ac.kr
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Abstract

The effects of ruthenium (Ru)-oxidation states were investigated on Ru dissolution from PtRu thin-film electrodes, with the 200 cycles between 0.4 and 1.05 V (versus normal hydrogen electrode). The Ru-oxidation states of the PtRu thin films were systematically modified by an anodic (oxidation) treatment. The anodic-treated PtRu electrodes, whose methanol-oxidation activity was similar to untreated electrodes before the 200 cycles, showed a remarkable decrease in methanol oxidation after the cycles, because of the Ru dissolution from the PtRu surface. The results suggest that the Ru-oxide species are the origin of Ru dissolution in the PtRu alloy.

Keywords

CatalyticRuSurface chemistry
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 9 , September 2009 , pp. 2762 - 2766
Copyright
Copyright © Materials Research Society 2009

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