In Situ Time‐Resolved Dynamic Surface Events on the Pt/C Cathode in a Fuel Cell under Operando Conditions

Abstract

On the Pt/C cathode in a fuel cell, dynamic surface events were investigated by novel X-ray absorption techniques (see Fourier transform for the oxidation process, 0.4→1.0 V). Evidence for Pt dissolution at the cathode was found, and the reaction kinetics of the electron-transfer processes, as well as redox structural changes and a significant time lag between the events, were observed for the first time under operando conditions. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z604732_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.