Ta and Nb co-doped TiO2 and its carbon-hybrid materials for supporting Pt-Pd alloy electrocatalysts for PEM fuel cell oxygen reduction reaction

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DOIResolve DOI: http://doi.org/10.1039/c4ta02062f
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TypeArticle
Journal titleJournal of Materials Chemistry A
ISSN2050-7488
Volume2
Issue32
Pages1268112685; # of pages: 5
SubjectAlloys; Carbon; Electrocatalysts; Electrolytic reduction; Hybrid materials; Niobium; Platinum; Proton exchange membrane fuel cells (PEMFC); Tantalum; Titanium dioxide; Carbon support; Co-doped tio; Hybrid support; Mass activity; Oxygen reduction reaction; PEM fuel cell; Physico-chemical interactions; Thermal hydrolysis; Platinum alloys
AbstractTo explore possible substitutes for carbon supports in PEM fuel cell catalysts, both Ta and Nb co-doped TiO2 (TaNbTiO2) and carbon-TaNbTiO2 (C-TaNbTiO2) hybrid support materials are successfully synthesized by a modified thermal hydrolysis method. These materials are employed as support candidates for Pt-Pd alloy catalysts for the oxygen reduction reaction. Among several supported catalysts, 20 wt% Pt 0.62Pd0.38/C75wt%-(Ta0.01Nb 0.03Ti0.96O2)25wt% is found to have an oxygen reduction reaction (ORR) mass activity of 260 mA mgPt -1 and an ORR loss of 30%, which are slightly better than those of the commercially available Pt/C baseline catalyst which has a mass activity of 110 mA mgPt -1 and an ORR loss of 40% probably because of a strong physicochemical interaction among the Pt-Pd alloy catalyst particle, carbon-TaNbTiO2 support and carbon, as well as the stability of oxide to protect carbon from corrosion by the distribution of oxide onto carbon, respectively.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21272665
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Record identifiera728ffa3-cdb5-4610-b181-f33a783fa631
Record created2014-12-03
Record modified2016-05-09
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