Microscopic Insight into the Polarization-Dependent Oxygen Evolution Reaction on the Surface of Intrinsic Ferroelectric Semiconductor β-CuGaO2

Ferroelectric semiconductors hold great promise in the field of photocatalysis due to their spontaneous polarization that can suppress the recombination of photogenerated charges, but the mechanism of the effect of ferroelectric polarization and the intensity of polarization on surface catalytic reactions have never been approached. Here, we have comparatively investigated the oxygen evolution reaction (OER) catalytic process on surfaces in polarized and unpolarized orientations of the intrinsic ferroelectric semiconductor β-CuGaO