Bi-functional oxygen electrocatalysts based on palladium oxide-ruthenium oxide composites

Jaka Sunarso, Angel A J Torriero, Patrick C. Howlett, Douglas R. MacFarlane, Maria Forsyth

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


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, Pd0/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).

Original languageEnglish
Title of host publicationSymposium C – Electrocatalysis and Interfacial Electrochemistry for Energy Conversion and Storage
PublisherMaterials Research Society
Number of pages5
ISBN (Print)9781632660886
Publication statusPublished - 2013
EventMaterials Research Society Symposium (MRS) 2012 (Fall) - Boston, United States of America
Duration: 25 Nov 201230 Nov 2012


ConferenceMaterials Research Society Symposium (MRS) 2012 (Fall)
Abbreviated titleMRS 2012 Fall
Country/TerritoryUnited States of America
Internet address

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