Formic acid tolerant IR-based electrocatalysts for Oxygen reduction reaction

  1. Get@NRC: Formic acid tolerant IR-based electrocatalysts for Oxygen reduction reaction (Opens in a new window)
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Journal titleInternational Journal of Green Energy
Pages295305; # of pages: 11
SubjectAcid tolerance; Alloy catalyst; Direct formic acid fuel cells; Oxygen reduction reaction; 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; alloy; catalyst; chromium; cobalt; electrode; formic acid; fuel cell; iridium; nickel; oxygen; reduction
AbstractIn 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. Copyright © Taylor & Francis Group, LLC.
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AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation (IFCI-IIPC)
Peer reviewedYes
NPARC number21271355
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Record identifier72d10a19-6d6b-43e2-8745-f4956834a1de
Record created2014-03-24
Record modified2016-05-09
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