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Elementary reaction rates of the hydrogen electrode reaction on nickel analyzed by means of deuterium tracer—I the anodic region

✍ Scribed by T. Matsushima; M. Enyo

Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
689 KB
Volume
21
Category
Article
ISSN
0013-4686

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✦ Synopsis

The exchange reaction between deuterium gas and light water was conducted with a nickel electrode under anodic polarization. The rates of the constituent steps of the hydrogen electrode reaction were determined at various anodic overpotentials through analysis of the isotopic composition of the hydrogen gas. Reaction route (B = H,O or OH-) H,+ZH(a), H(a) + B+H'B + e was shown to interpret satisfactorily the results. The former step is rate-determining under low hydrogen pressures, whereas the latter becomes kinetically important at high hydrogen pressures. Dependence of the individual step rates upon overpotential was discussed.

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