The University of Southampton
University of Southampton Institutional Repository

To alloy or not to alloy? Cr modified Pt/C cathode catalysts for PEM fuel cells

Wells, Peter P., Qian, Yangdong, King, Colin R., Wiltshire, Richard J.K., Crabb, Eleanor M., Smart, Lesley E., Thompsett, David and Russell, Andrea E. (2008) To alloy or not to alloy? Cr modified Pt/C cathode catalysts for PEM fuel cells Faraday Discussions, 138, (1), pp. 273-285. (doi:10.1039/b707353b).

Record type: Article


The cathode electrocatalysts for proton exchange membrane (PEM) fuel cells are commonly platinum and platinum based alloy nanoparticles dispersed on a carbon support. Control over the particle size and composition has, historically, been attained empirically, making systematic studies of the effects of various structural parameters difficult. The controlled surface modification methodology used in this work has enabled the controlled modification of carbon supported Pt nanoparticles by Cr so as to yield nanoalloy particles with defined compositions. Subsequent heat treatment in 5% H2 in N2 resulted in the formation of a distinct Pt3Cr alloy phase which was either restricted to the surface of the particles or present throughout the bulk of the particle structure. Measurement of the oxygen reduction activity of the catalysts was accomplished using the rotating thin film electrode method and the activities obtained were related to the structure of the nanoalloy catalyst particles, largely determined using Cr K edge and Pt L3 edge XAS.

Full text not available from this repository.

More information

Published date: 2008
Keywords: fe, oxygen reduction, k-edge, electronic-structure, properties, electrocatalytic, platinum, surface-composition, edge spectra, co, absorption fine-structure


Local EPrints ID: 54511
ISSN: 0301-7249
PURE UUID: 35866d4f-8fc8-48d5-9b79-619819d8c8b2

Catalogue record

Date deposited: 19 Aug 2008
Last modified: 17 Jul 2017 14:35

Export record



Author: Peter P. Wells
Author: Yangdong Qian
Author: Colin R. King
Author: Richard J.K. Wiltshire
Author: Eleanor M. Crabb
Author: Lesley E. Smart
Author: David Thompsett

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.