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Effects of iron-phosphate coating on Ru dissolution in the PtRu thin-film electrodes

Published online by Cambridge University Press:  31 January 2011

Yejun Park ,
Byungjoo Lee ,
Chunjoong Kim ,
Jongmin Kim  and
Byungwoo Park
Yejun Park
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
Byungjoo Lee
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
Chunjoong Kim
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
Jongmin Kim
Affiliation:
Department of Materials Science and Engineering, and Research Center for Energy Conversion and Storage, Seoul National University, Seoul 151-744, Korea
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 FePO4 nanoscale coating on PtRu thin films were investigated on the block of Ru crossover. Ru dissolution was examined by the accelerated-potential cycles between 0.4 and 1.05 V. The results showed that Ru dissolution from FePO4-coated PtRu surface was inevitable due to the direct contact between the PtRu surface and aqueous electrolyte. However, the FePO4 coating layer on PtRu thin-film electrodes effectively retained the dissolved Ru species, thus preventing the dissolved Ru species from diffusing into the electrolyte. Moreover, the retained Ru species within the FePO4-coating layer were redeposited onto the PtRu surface during the cycling in the fresh electrolyte.

Keywords

CoatingDiffusionRu
Type
Articles
Information
Journal of Materials Research , Volume 24 , Issue 1 , January 2009 , pp. 140 - 144
Copyright
Copyright © Materials Research Society 2009

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