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Bi-functional oxygen electrocatalysts based on Palladium oxide-Ruthenium oxide composites

conference contribution
posted on 2012-01-01, 00:00 authored by Jaka Sunarso, Angel TorrieroAngel Torriero, Patrick HowlettPatrick Howlett, D MacFarlane, Maria ForsythMaria Forsyth
Bi-functional oxygen electrodes are an enabling component for rechargeable metal-air batteries and regenerative fuel cells, both of which are regarded as the next-generation energy devices with zero emission. Nonetheless, at the present, no single metal oxide component can catalyze both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with high performance which leads to large overpotential between ORR and OER. This work strives to address this limitation by studying the bi-functional electrocatalytic activity of the composite of a good ORR catalyst compound (e.g. palladium oxide, PdO) and a good OER catalyst compound (e.g. ruthenium oxide, RuO2) in alkaline solution (0.1M KOH) utilizing a thin-film rotating disk electrode technique. The studied compositions include PdO, RuO2, PdO/RuO2 (25wt.%/75wt.%), PdO/RuO2 (50wt.%/50wt.%) and PdO/RuO2 (75wt.%/25wt.%). The lowest overpotential (e.g. E (2 mA cm−2) - E (-2 mA cm−2)) of 0.82 V is obtained for PdO/RuO2 (25wt.%/75wt.%) (versus Ag|AgCl (3M NaCl) reference electrode).

History

Event

Materials Research Society Fall Meeting (2012 : Boston, Massachusettes)

Series

Volume 1491

Pagination

1 - 1

Publisher

Cambridge University Press

Location

Boston, Massachusettes

Place of publication

New York, NY

Start date

2012-11-25

End date

2012-11-30

ISSN

1946-4274

Language

eng

Publication classification

E2 Full written paper - non-refereed / Abstract reviewed

Title of proceedings

MRS Online Proceedings Library : MRS Fall Meeting : Volume 1491 : Symposium C : Electrocatalysis and Interfacial Electrochemistry for Energy Conversion and Storage

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