Investigation of electroreduction kinetics on modified p-InP in alkaline electrolyte

The electroreduction kinetics of surface modified p-InP were investigated. The surface was modified by electrodeposition of Co, Ru, Rh, Pt, Co/Pt, Ru/Pt, and Rh/Pt. Exchange current densities (i0) for hydrogen evolution were obtained both in te dark and under 100 mW/sq cm illumination. For sequentia...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1985-06, Vol.132 (6), p.1315-1319
Main Authors: COOK, R. L, DEMPSEY, P. F, SAMMELLS, A. F
Format: Article
Language:English
Subjects:
Chemistry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Photoelectrochemistry. Electrochemiluminescence
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Summary:The electroreduction kinetics of surface modified p-InP were investigated. The surface was modified by electrodeposition of Co, Ru, Rh, Pt, Co/Pt, Ru/Pt, and Rh/Pt. Exchange current densities (i0) for hydrogen evolution were obtained both in te dark and under 100 mW/sq cm illumination. For sequentially deposited metals, i0 values are lower compared to individually deposited metals during hydrogen evolution. Cathodic currents observed positive of the hydrogen-evolution region can be explained by electron-transfer processes involving p-InP surface states. In this latter potential region, i0 values are higher for the sequentially deposited metals.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2114109