Photoelectrochemical properties of p-type CuBi2O4 prepared by spray pyrolysis of carbon-free precursor aqueous solution combined with post-annealing treatment

CuBi 2 O 4 photoelectrodes were fabricated by a spray pyrolysis method using a carbon-free precursor solution. The optimized CuBi 2 O 4 generated a photocurrent of −0.94 mA cm −2 via H 2 O 2 reduction at 0.6 V RHE under simulated sunlight illumination.