Nanostructured palladium catalyst poisoning depressed by cobalt phosphide in the electro-oxidation of formic acid for fuel cells

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DOIResolve DOI: http://doi.org/10.1016/j.nanoen.2016.10.023
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TypeArticle
Journal titleNano Energy
ISSN22112855
Volume30
Pages355361
Subjectformic acid oxidation Fuel cells; nanostructured palladium Phosphide material
AbstractNanostructured palladium is considered as the best catalyst materials for direct formic acid fuel cells but catalyst poisoning suffering from the intermediates seriously reduces catalytic activity and stability, thus further hinders the commercial application of fuel cells technology. Herein, we report the tricky Pd catalyst poisoning problem could be greatly depressed by cobalt phosphide (CoP) material during formic acid oxidation, so an extremely active and stable Pd catalyst with very low Pd loading (5 wt%) is realized. The high anti-poisoning ability was evidenced by a significantly faster kinetics study and less poisoning intermediates adsorbed on its surface compared with Pd/C catalyst. When integrated into a real fuel cells model, a power density of 150 mW cm−2 catalyzed by this Pd-CoP/C catalyst (5 wt%, Pd) was comparable to that of the commercial Pd/C catalyst (20 wt%, Pd) indicating a very promising application in the electrochemical energy devices. This work opens an avenue to overcome the universal catalyst poisoning issue and pushes Pd catalyst system much stronger for commercial application in fuel cells technology.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number23000903
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Record identifier8a3730ca-cd6b-4be0-a889-15024f7dc490
Record created2016-11-09
Record modified2016-11-09
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