INFLUENCE OF THE NATURE OF SOLVENT AND REACTION MEDIUM ON KINETICS AND MECHANISM OF HYDROGENATION OF CERTAIN AROMATIC COMPOUNDS ON GROUP VIII METALS. VI. FLUCTUATIONS OF STATIONARY POTENTIAL OF THE CATALYST DURING HYDROGENATION OF NITROBENZENES.

The kinetics of hydrogenation of nitrobenzene and its derivatives on a skeletal nickel catalyst was studied with parallel observation of fluctuations of the potential of the catalyst during hydrogenation. It was found that the dependence of the logarithm of the hydrogenation rate constants of nitrobenzenes on the intensity of fluctuations of the catalyst potential is nonlinear. The dependence of the hydrogenation rate constants and the intensity of fluctuations of the potential of the catalyst discovered in this investigation can be regarded as a certain confirmation of the reliability of the hydrogenation mechanism and also indicates that a more comprehensive study of the fluctuations of the catalyst potential can give certain information on the catalytic processes.