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

Yejun Park | Zendy; ByungJoo Lee | Zendy; Chunjoong Kim | Zendy; Yuhong Oh | Zendy; Seunghoon Nam | Zendy; Byungwoo Park | Zendy

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

Author(s) -

Yejun Park,

ByungJoo Lee,

Chunjoong Kim,

Yuhong Oh,

Seunghoon Nam,

Byungwoo Park

Publication year - 2009

Publication title -

journal of materials research/pratt's guide to venture capital sources

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.788

H-Index - 148

eISSN - 0884-2914

pISSN - 0884-1616

DOI - 10.1557/jmr.2009.0331

Subject(s) - dissolution , ruthenium , ruthenium oxide , materials science , electrode , methanol , inorganic chemistry , oxide , electrocatalyst , thin film , anodic oxidation , alloy , catalysis , electrochemistry , chemical engineering , metallurgy , chemistry , nanotechnology , organic chemistry , engineering

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.

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