022ChemInform Abstract The ad-atoms of the IVth and Vth periodic groups cause a very strong enhancement of the activity of Pt. The optimum coverages with these ad-atoms are determined from steady-state current-potential curves on smooth ad-electrodes to be 0.5. The ad-atoms Pb, Bi, and Sb enhance the activity by about three orders of magnitude. The higher the activity of the ad-electrode, the higher is the tolerance against poisoning. A method of preparation of ad-electrodes with high-specific surface area is proposed. Their activity is high, but slightly lower than that of smooth electrodes.
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