Study of the Exchange英文文献资料.pdf

Study of the Exchange Current Density for the Hydrogen Oxidation and Evolution Reactions K. C. Neyerlin, Wenbin Gu, Jacob Jorne and Hubert A. Gasteiger J. Electrochem. Soc. 2007, Volume 154, Issue 7, Pages B631-B635. doi: 10.1149/1.2733987 Email alerting Receive free email alerts when new articles cite this article - sign up in the box at the service top right corner of the article or click here To subscribe to Journal of The Electrochemical Society go to: /subscriptions © 2007 ECS - The Electrochemical Society Downloaded on 2013-01-19 to IP 1 address. Redistribution subject to ECS license or copyright; see Journal of The Electrochemical Society, 154 7 B631-B635 2007 B631 0013-4651/2007/1547/B631/5/$20.00 © The Electrochemical Society Study of the Exchange Current Density for the Hydrogen Oxidation and Evolution Reactions K. C. Neyerlin,a,b,z Wenbin Gu,a,* Jacob Jorne,b,* and Hubert A. Gasteigera,* aGeneral Motors—Fuel Cell Activities, Honeoye Falls, New York 14472, USA b Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, USA The exchange current density for the hydrogen oxidation/evolution reactions was determined in a proton exchange membrane fuel cell. Ultralow Pt-loaded electrodes 0.003 mg 2 Pt/cm were used to obtain measurable kinetic overpotential signals 50 mV at 2 A/cm2. Using a simple Butler–Volmer equation, the exchange current density and transfer coefficient were determined to lie