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In Situ XAS Studies of Core-Shell PEM Fuel Cell Catalysts: The Opportunities and Challenges

Russell, Andrea E.; Tessier, Beatrice; Wise, Anna; Rose, Abigail; Price, Stephen W.; Richardson, P. W.; Ball, Sarah; Theobald, Brian; Thompsett, David and Crabb, Eleanor M. (2011). In Situ XAS Studies of Core-Shell PEM Fuel Cell Catalysts: The Opportunities and Challenges. ECS transactions, 41(1) pp. 55–67.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1149/1.3635543
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Abstract

Core-shell electrocatalysts are of increased interest in PEM fuel cells as a means of improving activity and reducing costs. In situ x-ray absorption spectroscopy (XAS) provides a unique opportunity to provide characterization of the structure of such materials under operating conditions, enabling the effects of the electrochemical environment on the structures to be explored. However, such measurements present numerous challenges in terms of both data collection and analysis. Here we present two case studies that illustrate both the opportunities and challenges; (i) the modification of a Pt catalyst by Ru and the potential dependent formation of a surface alloy and (ii) a Pt shell - Pd core catalyst with varying shell thickness.

Item Type: Journal Article
Copyright Holders: 2011 The Electrochemical Society
ISSN: 1938-6737
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
eSTEeM
Biomedical Research Network (BRN)
Item ID: 33091
Depositing User: Eleanor Crabb
Date Deposited: 06 Mar 2012 11:41
Last Modified: 07 Mar 2014 13:42
URI: http://oro.open.ac.uk/id/eprint/33091
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