A novel CO-tolerant PtRu core-shell structured electrocatalyst with Ru rich in core and Pt rich in shell for hydrogen oxidation reaction and its implication in proton exchange membrane fuel cell

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2011.05.020
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleJournal of Power Sources
ISSN0378-7753
Volume196
Issue22
Pages91179123; # of pages: 7
SubjectAlloy formation; CO concentrations; CO-tolerance; Core-shell; Crystalline structure; Diffraction peaks; Electrocatalytic activity; Energy dispersive x-ray spectrometry; EXAFS; Fine structures; Hydrogen oxidation reaction; Hydrogen oxidation reaction (HOR); In-shell; Microwave irradiation techniques; Novel structures; Proton exchange membranes; Pt-Ru catalysts; PtRu/C catalysts; Absorption; Absorption spectroscopy; Diffraction; Electrocatalysts; Hydrogen; Microwave irradiation; Oxidation; Platinum; Proton exchange membrane fuel cells (PEMFC); Protons; Structure (composition); Transmission electron microscopy; X ray absorption; X ray diffraction; Platinum alloys
AbstractA novel PtRu catalyst consisting of a Ru-rich core and a Pt-rich shell was synthesized using a two-step microwave irradiation technique. The synthesized PtRu/C catalysts were characterized by X-ray diffraction (XRD), extended X-ray absorption finestructure (EXAFS), transmission electron microscopy (TEM) as well as energy dispersive X-ray spectrometry (EDXS). The produced PtRu/C catalysts showed identical crystalline structure and diffraction peaks to Pt itself, but with negligible higher 2 shift degrees, indicating the formation of a specific composite structure rather than alloy formation. This novel structure of PtRu/C catalyst was also further verified via X-ray absorption spectroscopy. The particle size of PtRu catalysts identified by TEM was less than 5 nm. In order to investigate the CO tolerance in the hydrogen oxidation reaction (HOR), H 2 streams with six different concentrations of CO (0, 10, 50, 100, 300, and 500 ppm) were used. The electrocatalytic activity thus obtained was not only better than that of Pt/C catalyst in HOR, but also showed a better CO tolerance in various CO concentrations. © 2011 Published by Elsevier B.V. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Fuel Cell Innovation (IFCI-IIPC)
Peer reviewedYes
NPARC number21271299
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Record identifier29a31a33-bcd8-485c-a346-ef10990826ed
Record created2014-03-24
Record modified2016-05-09
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