Cathode catalysts degradation mechanism from liquid electrolyte to membrane electrode assembly - 01/07/14
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Abstract |
Single-cell and half-cell degradation test procedures were evaluated for carbon-supported Pt/C, PtCo/C and PtNi/C catalysts. Half-cell analyses were employed to understand the effect of the number of cycles and of the scan rate over the cathode catalysts degradation under potential cycling from 0.6 to 1.2V. The data suggested a time-dependent degradation for all three catalytic systems. Single-cell measurements were used to evaluate the impact of catalyst degradation on fuel cell performance. The measurements in both setups showed similar ECSA and ORR mass activity losses. Specific degradation mechanisms related to Pt dissolution, Pt agglomeration, and transitional metal leaching were quantified and correlated with performance losses.
Le texte complet de cet article est disponible en PDF.Keywords : Carbon-supported platinum catalysts, Membrane electrode assembly, Half-cell durability tests, Single-cell durability tests, Potential cycling, Polymer Electrolyte Fuel Cell
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☆ | Thematic issue dedicated to François Garin. |
Vol 17 - N° 7-8
P. 752-759 - juillet 2014 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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