Catalytic Activities of Pt–Metal Alloys on Oxygen Reduction Reaction in Fluorohydrogenate Ionic Liquid

Oxygen reduction reaction (ORR) rate constants (k) on Pt and Pt–M (M = Fe, Co, Ni) electrodes were evaluated in N-ethyl-N-methylpyrrolidinium fluorohydrogenate (EMPyr(FH)1.7F) ionic liquid at 298–333 K. The Pt–Fe electrode exhibited the best catalytic activity in EMPyr(FH)1.7F, because of the large...

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Veröffentlicht in:	Denki kagaku oyobi kōgyō butsuri kagaku 2016/10/05, Vol.84(10), pp.766-768
Hauptverfasser:	KIATKITTIKUL, Pisit, YAMAGUCHI, Jumpei, NOHIRA, Toshiyuki, HAGIWARA, Rika
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloys Catalysis Catalytic activity Chemical reduction Cobalt Electrodes Fluorohydrogenate Ionic Liquid Fuel Cell Ionic liquids Ions Iron Liquid oxygen Oxygen Oxygen Reduction Reaction Oxygen reduction reactions Photoelectron spectroscopy Photoelectrons Platinum base alloys Pt Alloy Rate constants Scanning electron microscopy
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Zusammenfassung:	Oxygen reduction reaction (ORR) rate constants (k) on Pt and Pt–M (M = Fe, Co, Ni) electrodes were evaluated in N-ethyl-N-methylpyrrolidinium fluorohydrogenate (EMPyr(FH)1.7F) ionic liquid at 298–333 K. The Pt–Fe electrode exhibited the best catalytic activity in EMPyr(FH)1.7F, because of the large surface area of its nanoporous structure after Fe dissolution. X-ray photoelectron spectroscopy and field-emission scanning electron microscopy showed that Co and Ni barely dissolved in EMPyr(FH)1.7F. The observed ORR activities of Pt–Co and Pt–Ni alloys were lower than that of Pt in EMPyr(FH)1.7F.
ISSN:	1344-3542 2186-2451
DOI:	10.5796/electrochemistry.84.766