Impedance Investigations of the Mechanism of Oxygen Evolution on Composite Electrodes

作者：K. Darowicki, Juliusz Orlikowski · 发表于：Journal of The Electrochemical Society · 年份：1999 · DOI：10.1149/1.1391659 · 被引用次数：23 · 研究领域：Conducting polymers and applications、Electrochemical Analysis and Applications、Electrocatalysts for Energy Conversion

Impedance measurements of the oxygen evolution reaction on a composite electrode prepared from an ethylene‐propylene terpolymer (EPDM) admixed with acetylene carbon black have been carried out. A theoretical analysis of measured impedance is presented. The mechanism of the oxygen evolution reaction has been determined. The oxygen evolution reaction is composed of two electrochemical steps and one chemical step. The slowest step for the oxygen evolution reaction is the first charge transfer step which is based on the formation of an intermediate OH Ad adsorbed species. © 1999 The Electrochemical Society. All rights reserved.