High throughput, multi-pH evaluation of earth-abundant pseudo-quaternary metal oxide catalysts for the oxygen evolution reaction

Abstract

The development of efficient, stable photoanodes for solar fuels generators requires integration of a light absorbing semiconductor with an efficient oxygen evolution reaction catalyst. However, the abs. and relative performance of different OER catalyst compns. vary with electrolyte pH. The operational conditions for the solar fuel generators is often dictated by the pH stability range of the light absorber, not the conditions optimal for OER catalysis. We are evaluating the activity and stability against corrosion of dozens of comprehensive multi-metal oxide compn. spaces from pH 1-13 using high throughput electrochem. methods. This talk will describe these methods and characteristic results.