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

Published online by Cambridge University Press:  28 December 2012

Jaka Sunarso ,
Angel A.J. Torriero ,
Patrick C. Howlett ,
Douglas R. MacFarlane  and
Maria Forsyth
Jaka Sunarso
Affiliation:
Australian Research Council (ARC) Center of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
Angel A.J. Torriero
Affiliation:
Australian Research Council (ARC) Center of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
Patrick C. Howlett
Affiliation:
Australian Research Council (ARC) Center of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
Douglas R. MacFarlane
Affiliation:
Australian Research Council (ARC) Center of Excellence for Electromaterials Science, School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia
Maria Forsyth
Affiliation:
Australian Research Council (ARC) Center of Excellence for Electromaterials Science, Institute for Frontier Materials, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia
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Abstract

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).

Keywords

PdRuO
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1491: Symposium C – Electrocatalysis and Interfacial Electrochemistry for Energy Conversion and Storage , 2013 , mrsf12-1491-c06-06
Copyright
Copyright © Materials Research Society 2012

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References

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