International Journal of Hydrogen Energy, Vol.44, No.52, 28184-28193, 2019
Reasonable regulation of kinetics over BiVO4 photoanode by Fe-CoP catalysts for boosting photoelectrochemical water splitting
Photoelectrochemical (PEC) water splitting using earth-abundant semiconductor offer a promising strategy to produce the sustainable clean energy. Herein, we successfully engineered BiVO4 photoanode with Fe-doped CoP oxygen evolution catalysts (BiVO4-Fe/CoP) for the first time. Fe/CoP catalysts could significantly break the kinetic limitations of BiVO4, contributing to the enhanced charge injection efficiencies and charge carrier density. The rational heterostructure has boosted the photocurrent density and incident photon-to-current conversion efficiency (IPCE) to 2.16 mA/cm(2) and 43% (7 times than that of the bare BiVO4), respectively. Meanwhile, the BiVO4-Fe/CoP photoanode also exhibited the desirable long-term stability during PEC water oxidation for 4 h. The results prove the feasibility of BiVO4-Fe/CoP configuration, which further provided a novel approach towards the development of efficient PEC water oxidation system. (C) 2019 Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC.