Rate Processes Related to the Hydrated Nickel Hydroxide Electrode in Alkaline Solutions

Abstract

The potentiodynamic response of the Ni/alkaline aqueous solution interface in the region of the hydrated to electrochemical reaction reveals that both species undergo phase transformations. The anodic product from the species involves the formation of three species energetically different which are detected during the electroreduction process. Under well‐defined perturbation conditions, a reasonable set of kinetic parameters pertaining to the anodic process is obtained which is formally interpreted through a consecutive three‐step mechanism of reaction involving a charge transfer, a chemical reaction, and a charge transfer and a proton transfer process. Side reactions involving water take into account the various aging processes of the reaction products.