期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 7, 期 11, 页码 1153-1156出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2005.08.014
关键词
PEMFC; degradation; HOPG; electrochemical oxidation; AFM
Carbon corrosion that is presumed to occur at the proton exchange membrane fuel cell (PEMFC) cathode was visualized by atomic force microscopy (AFM) and field emission-scanning electron microscopy (FE-SEM) observations using a fundamental model electrode. Platinum nanoparticles were deposited on a highly oriented pyrolytic graphite (HOPG) substrate as a model cathode catalyst, and its stability in an acid solution at a fixed potential was investigated. The formation of blisters on the surface of the model electrode was observed by AFM after it was kept at 1.0 V vs. RHE, especially at and around the Pt particles. FE-SEM observations using a backscattered electron detector revealed that Pt particles remained unchanged at their original positions after the formation of blisters. (c) 2005 Elsevier B.V. All rights reserved.
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