Über die anodische oxidation von hydrazinderivaten an platin im sauren elektrolyten I. Phenylhydrazin

The investigation of the anodic oxidation of phenylhydrazine at smooth platinum in acid solutions by the triangular voltage scan method, by controlled potential electrolysis and by potential step measurements yields the following results:(1) The overall-reaction yields 4 electrons per PH-molecule.(2) Within the PH-oxidation an inhibiting intermediate is developed, whose further reaction is limited, and which can be reduced by hydrogen.(3) The kinetics of the oxidation reaction are determined by a 1-electron step. The anodic reaction orders of phenylhydrazine and H⁺-ions are z_PH = 0.4 and z_H⁺ = ?0.8, respectively.These results are interpreted by means of a reaction mechanism. The kinetics of the oxidation are explained with the aid of the Temkin adsorption isotherm.