Accession Number : AD0781372

Title :   Anodic Charging of Electrodes at Low Temperatures Studied by Electron Spin Resonance,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Gardner,C. L. ; Casey,E. J.

Report Date : 18 OCT 1973

Pagination or Media Count : 10

Abstract : A study of anodic oxidation processes at several electrodes at low temperatures in KOH solutions is presented. The techniques of electron spin resonance have been used to identify intermediates. From a detailed kinetic analysis of the information obtained, the role of the formation and decay of O3(-) and certain metallic oxide radicals in the anodic charging of metal (hydr)oxide electrodes has been deduced. The formation of O3(-) and/or O2(-), or neither, during anodic oxygen evolution seems to be controlled by the tightness of binding of OH to the surface (hydr)oxide which changes with the metal in the (inferred) order of increasing binding strength Cd, Pb, Ni, Pt. (Modified author abstract)

Descriptors :   *Anodic coatings, *Oxidation, Oxygen, Electrochemistry, Electrodes, Reaction kinetics, Anions, Ozone, Electron paramagnetic resonance, Canada, Surface chemistry

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE