Amorphous Mixed-Metal Oxides Tailored for Oxygen Evolution Electrocatalysis

Curtis Berlinguette^a

^aThe University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada

Proceedings of International Conference on New Advances in Materials Research for Solar Fuels Production (SolarFuel14)

Montréal, Canada, 2014 June 25th - 26th

Organizer: Thomas Hamann

Invited Speaker, Curtis Berlinguette, presentation 004
Publication date: 16th April 2014

The electrochemical conversion of water into hydrogen fuel is one of the most promising schemes for the large-scale storage of solar electricity. There is unfortunately a substantial overpotential (η) required to produce hydrogen at a meaningful rate due to slow oxygen evolution kinetics. Consequently, the development of efficient oxygen evolution reaction (OER) catalysts is vital to achieving a clean hydrogen economy. While most OER catalysts are based on crystalline oxides, higher activities can generally be achieved with amorphous phases. There are, however, limited methods available for producing amorphous catalytic films. We filled this gap by recently demonstrating amorphous phases of metal oxide films can be accessed through a facile photochemical decomposition technique. This fabrication method enables the use of different combinations with precise compositional control. Pure iron, nickel and cobalt oxides were investigated, along with various compositions of the mixed metal oxides, and shown to display remarkably high efficiencies towards the OER reaction.

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