Actions for Investigating the effects of proton exchange membrane fuel cell conditions on carbon supported platinum electrocatalyst composition and performance [electronic resource].

Email RIS file
Bookmark
Report an Issue

Investigating the effects of proton exchange membrane fuel cell conditions on carbon supported platinum electrocatalyst composition and performance [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
D107 - D107-7 : digital, PDF file
Additional Creators
University of New Mexico. Department of Chemical and Nuclear Engineering, United States. Department of Energy, United States. Department of Energy. Office of Energy Efficiency and Renewable Energy, and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
Changes that carbon-supported platinum electrocatalysts undergo in a proton exchange membrane fuel cell environment were simulated by ex situ heat treatment of catalyst powder samples at 150 C and 100% relative humidity. In order to study modifications that are introduced to chemistry, morphology, and performance of electrocatalysts, XPS, HREELS and three-electrode rotating disk electrode experiments were performed. Before heat treatment, graphitic content varied by 20% among samples with different types of carbon supports, with distinct differences between bulk and surface compositions within each sample. Following the aging protocol, the bulk and surface chemistry of the samples were similar, with graphite content increasing or remaining constant and Pt-carbide decreasing for all samples. From the correlation of changes in chemical composition and losses in performance of the electrocatalysts, we conclude that relative distribution of Pt particles on graphitic and amorphous carbon is as important for electrocatalytic activity as the absolute amount of graphitic carbon present
Report Numbers
E 1.99:doe/ee0000466-3
doe/ee0000466-3
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
04/30/2012.
"doe/ee0000466-3"
Journal of Vacuum Science and Technology A: Vacuum, Surfaces, and Films 30 4 ISSN 0734-2101 FT
A. Patel; K. Artyushkova; P. Atanassov; M. Dutta; V. Colbow; S. Wessel; D. Harvey.
Ballard Power Systems, Burnaby, B.C.
Funding Information
EE0000466
View MARC record | catkey: 14066080