Simulation of Polarization Curves for Oxygen Reduction Reaction in 0.5 M H₂SO₄ at a Rotating Ring Disk Electrode

Author(s)

Qingbo Dong
Shriram Santhanagopalan
Ralph E. White, University of South Carolina - ColumbiaFollow

Document Type

Article

Abstract

A cylindrical two-dimensional model based on the Nernst–Planck equations, the Navier–Stokes equation, and the continuity equation is used to simulate the oxygen reduction reaction in 0.5MH₂SO₄ at a rotating ring disk electrode. Concentration distributions and a potential profile are obtained as a function of the axial and radial distances from the center of the electrode surface. Polarization curves are simulated to interpret experimental results by studying various reaction mechanisms, i.e., the four-electron-transfer reduction of oxygen, the two-electron-transfer reduction of oxygen, a combination of the above two reactions, mechanisms with reduction of peroxide to water, and/or the heterogeneous chemical decomposition of peroxide. Special attention is devoted to the effect of peroxide.

Publication Info

Published in Journal of the Electrochemical Society, Volume 154, Issue 8, 2007, pages A816-A825.

Rights

© The Electrochemical Society, Inc. 2007. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in

Dong, Q., Santhanagopalan, S., & White, R.E. (2007). Simulation of Polarization Curves for Oxygen Reduction Reaction in 0.5 M H₂SO₄ at a Rotating Ring Disk Electrode. Journal of the Electrochemical Society. 154(8), A816-A825.

Publisher’s Version: http://dx.doi.org/10.1149/1.2741056