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Formic acid tolerant IR-based electrocatalysts for oxygen reduction reaction

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1080/15435075.2011.557849
AuthorSearch for: 1; Search for: 1ORCID identifier: https://orcid.org/0000-0002-1823-2948; Search for: 1
Affiliation
  1. National Research Council of Canada. NRC Institute for Fuel Cell Innovation
FormatText, Article
Subjectacid tolerance; alloy catalyst; direct formic acid fuel cells; oxygen reduction reaction (orr); Pd/C catalyst; rotating disk electrodes; transfer process; alloys; chromium; cobalt; electrocatalysts; electrolytic reduction; electron transitions; formic acid; formic acid fuel cells (FAFC); oxygen; platinum alloys; rotating disks; iridium; catalyst; chromium; cobalt; electrode; formic acid; fuel cell; iridium; nickel; oxygen; reduction
Abstract
In this paper, carbon-supported Ir-Co, Ir-Ni, and Ir-Cr catalysts (Ir-Co/C, Ir-Ni/C, and Ir-Cr/C) were synthesized and characterized for the oxygen reduction reaction (ORR). Compared to both Pt/C and Pd/C catalysts, these Ir alloy catalysts demonstrated much higher formic acid tolerance capabilities during the ORR process in a 0.5 M H2SO4 solution containing both oxygen and formic acid. Rotating disk electrode measurements confirmed that if formic acid was present, these Ir alloy catalysts could still catalyze a complete 4-electron transfer ORR from O2 to H 2O, while the Pt/C catalyst could only catalyze a reaction contributed by both 2- and 4-electron transfer processes, producing both H 2O2 and H2O. These results strongly suggest that Ir alloy catalysts should be promising candidates for direct formic acid fuel cell applications.
Publication date
PublisherTaylor & Francis
In
  • International Journal of Green Energy 8, no. 3 (25 April 2011): 295–305.
LanguageEnglish
Peer reviewedYes
NPARC number21271355
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Record identifier72d10a19-6d6b-43e2-8745-f4956834a1de
Record created2014-03-24
Record modified2021-08-17
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