Photocatalysis as a desirable technology shows huge potentials in renewable energy generation/conversion and environmental remediation, but its success ultimately relies on the development of excellent semiconductor photocatalysts. In this regard, cuprous delafossites exhibit exceptional electrical, magnetic, optical, and catalytic properties and could be suitable candidates to meet the demands and requirements. Herein, we have explored the photoelectrochemical and photocatalytic aspects of several earth-abundant and non-toxic delafossites with a CuMO2-type general composition, where ‘M’ is trivalent metals of Al, Ga, Cr, Co, Fe, Y, etc. We have tested the electrochemical (EC) and photoelectrochemical (PEC) performance along with their stability for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) of the synthesized CuMO2 samples. Some of the developed CuMO2 electrolyzers are proven to be efficient to produce hydrogen, which can enable the realization of clean renewable energy and environmental remediation infrastructure.

Exploration of p-type delafossite CuMO2 oxides as photocatalysts

2019 Fall National Meeting

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