Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 13, Issue 4, Pages 317-320Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.01.013
Keywords
Pt-Co alloy; Single-crystal; Hydrogen adsorption; Surface oxidation; STM
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Funding
- New Energy and Industrial Development Organization of japan
- Ministry of Education, Science, Culture, Sports, and Technology of Japan [20750007]
- Grants-in-Aid for Scientific Research [20750007] Funding Source: KAKEN
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We describe the novel and facile preparation of Pt100-xCox alloy single-crystals and preliminary results on the electrochemical behavior of Pt100-xCox(111) surfaces in 0.1 MHClO4 solution as a function of Co composition. The prepared Pt-Co(111) surfaces were characterized by low energy electron diffraction and scanning tunneling microscopy; the results suggest the thermal formation of a Pt skin layer on the alloy surface. The cyclic voltammograms of the Pt100-xCox(111) electrodes exhibited increasingly negative shifts of the hydrogen adsorption onset potentials and positive shifts of the surface oxidation onset potentials as a function of the Co content due to the modified electronic structure of the Pt skin layer by the underlying Pt-Co alloy. (C) 2011 Elsevier B.V. All rights reserved.
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