ANALYSIS OF THE POLARIZATION BEHAVIOR OF THE GAS-GENERATING ELECTRODE- THE STEADY-STATE PROCESS

Modeling polarization dependences are studied at a gas-generating elec trode under steady-state conditions. Complications intrinsic to charge transfer and molization of intermediate products (adsorbed atoms) of an electrochemical reaction involving formation of a molecular form of gas species are accounted for through mechanisms of recombination and /or electrochemical desorption. In the case where adsorption equilibri um at the electrode obeys the Frumkin isotherm, a general equation is derived that includes parameters of the adsorption isotherm and partia l electrode reactions. Special cases are noted that admit analytical s olutions. Numerical methods are used to conduct modeling calculations of the steady-state polarization curves and the overvoltage dependence s of the adsorption coverage. Specific features pertaining to the elec trode processes that proceed via the recombination, electrochemical de sorption, and mixed mechanisms are noted.