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The mechanisms of oxygen and hydrogen evolution on amorphous alloys G 14 (Fe 60 Co 20 Si 10 B 10 ) and G 16 (Co 50 Ni 25 Si 15 B 10 ) in 1 M KOH at T = 298 K and 333 K were studied by electrochemical impedance spectroscopy (EIS). Comparative measurements were carried out on polycrystalline Pt electrodes. Impedance spectra in the frequency range 10 −3 Hz ≤ f ≤ 10 4 Hz were analyzed to determine the kinetic behaviour of amorphous alloys by application of transfer function analysis, using non‐linear fit routines. The EIS‐data are interpreted in terms of consecutive reaction mechanisms for both oxygen and hydrogen evolution.
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Kessler et al. (1991) studied this question.
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