The impact of impurities on long-term PEMFC performance [electronic resource].

Published: Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators: Los Alamos National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary

Electrochemical experimentation and modeling indicates that impurities degrade fuel cell performance by a variety of mechanisms. Electrokinetics may be inhibited by catalytic site poisoning from sulfur compounds and CO and by decreased local proton activity and mobility caused by the presence of foreign salt cations or ammonia. Cation impurity profiles vary with current density, valence and may change local conductivity and water concentrations in the ionomer. Nitrogen oxides and ammonia species may be electrochemically active under fuel cell operating conditions. The primary impurity removal mechanisms are electrooxidation and water fluxes through the fuel cell.

Report Numbers

E 1.99:la-ur-09-03937
E 1.99: la-ur-09-3937
la-ur-09-3937
la-ur-09-03937

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Note

Published through SciTech Connect.
01/01/2009.
"la-ur-09-03937"
" la-ur-09-3937"
215th meeting of the Electrochemical Society Fall Meeting ; October 4, 2009 ; Vienna, Austria.
Rockward, Tommy; Mukundan, Rangachary; Garzon, Gernando H; Lopes, Thiago; Sansinena, Jose - Maria; Kienitz, Brian.

Funding Information

AC52-06NA25396

View MARC record | catkey: 14445605