Sims analysis of the distribution of hydrogen absorbed by gold electrodes during the evolution of hydrogen |
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Authors: | F. Chao M. Costa R. Parsons C. Grattepain |
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Affiliation: | 1. Laboratoire d''Electrochimie Interfaciale, C.N.R.S., 1, Place Aristide Briand 92190 Meudon France;2. Laboratoire de Physique du Solide, C.N.R.S., 1, place Aristide Briand, 92190 Meudon France |
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Abstract: | Gold electrodes were charged with hydrogen by strong cathodic treatment in 0.5 M H2SO4. The concentration of hydrogen was then studied by SIMS both along the surface and in depth by etching in the ion beam. With electrodes consisting of a small number of crystals, the absence of abnormal hydrogen concentration at the grain boundaries seems to rule out diffusion along this route. The profiles observed seem to be consistent with a simple model of uniform bulk diffusion. |
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