Investigation of Adsorbed Hydrogen on Platinum Electrode by Means of Dynamic Impedance Measurement

Abstract

Adsorbed H phenomena on a Pt electrode were investigated by an impedance method which draws potentiodynamically the in-phase and quaudrature components of electrode admittance. The kinetic behavior of H adsorbed on Pt was examd. in full with the complex capacitance representation. The kinetic exptl. results were well explained on the basis of the proposed equiv. circuit which was composed of the pseudocapacitance, Warburg impedance, and ohmic component assocd. with the adsorption-desorption process of adsorbed H, together with the reaction resistance due to the Volmer reaction. [on SciFinder(R)]