Synthesis and characterization of quaternary PtRuIrSn/C electrocatalysts for direct ethanol fuel cells

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2010.05.038
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TypeArticle
Journal titleJournal of Power Sources
Volume195
Issue21
Pages71687175; # of pages: 8
SubjectDirect ethanol fuel cells; Ethanol sensor; Ethanol electro-oxidation; Quaternary catalysts; Durability; Platinum alloys
AbstractTo find a more durable anode with high performance for direct ethanol fuel cells (DEFCs), the present study investigates a series of quaternary electrocatalysts, Pt30Ru30Ir40?xSnx/C (wt.%), for the ethanol electro-oxidation reaction (EOR). The carbon-supported Pt30Ru30Ir40?xSnx/C electrocatalysts were prepared by a known impregnation-reduction (borohydride) method. The microstructure and chemical composition were determined by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). The activity of the electrocatalysts for EOR was compared to commercial Pt67Ru33/C (HISPEC5000) using linear sweep voltammetry (LSV) based on similar Pt loading. The results of this study show that electrocatalyst composition with 10 and 20% Ir (wt.%) exhibit higher electrocatalytic activity than the commercial PtRu electrocatalyst. The single fuel cell testing at 90 ?C comparing Pt30Ru30Ir40?xSnx/C to commercial Pt67Ru33/C and Pt83Sn17/C anodes showed an enhancement of Pt activity (normalized to Pt loading) in the following order: Pt30Ru30Ir10Sn30 >Pt30Ru30Sn40 ?Pt30Ru30Ir40 ?Pt83Sn17 >Pt67Ru33. After a long-term performance test, the activity changed to the following order: Pt30Ru30Ir10Sn30 >Pt30Ru30Ir40 >Pt30Ru30Sn40 > Pt83Sn17 >Pt67Ru33. Pt30Ru30Ir10Sn30/C exhibited both a higher performance with a specific power density of 29mWmgPt?1 without O2 backpressure at the cathode and an excellent long-term stability in a DEFC operating at 90 ?C.
Publication date
LanguageEnglish
AffiliationNRC Institute for Fuel Cell Innovation; National Research Council Canada
Peer reviewedYes
NPARC number16925465
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Record identifier76450a1e-3723-4020-aa0b-333861520ccc
Record created2011-02-25
Record modified2016-05-09
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