Journal article
Imaging Reactivity of the Pt–Ionomer Interface in Fuel-Cell Catalyst Layers
Abstract
The interface between perfluorosulfonic acid polymer electrolytes and Pt nanoparticles in a model hydrogen fuel-cell catalyst layer was analyzed using high-resolution scanning transmission X-ray microscopy. After electrochemical cycling, thin films of damaged ionomer, enriched in CC bonds, are observed near the Pt surface. This local degradation of the Pt–ionomer interface triggered by electrochemical oxidation contrasts with that from …
Authors
Martens I; Melo LGA; West MM; Wilkinson DP; Bizzotto D; Hitchcock AP
Journal
ACS Catalysis, Vol. 10, No. 15, pp. 8285–8292
Publisher
American Chemical Society (ACS)
Publication Date
August 7, 2020
DOI
10.1021/acscatal.0c01594
ISSN
2155-5435