| 초록 |
The intrinsically short charge carrier diffusion lengths, poor electron transportability, unsatisfying water oxidation kinetics, have given limitations for the photoelectrochemical (PEC) performance of the bismuth vanadate (BiVO4) photoanode. Herein, we report an approach to address these problems by incorporating Ni2P as a cocatalyst on the surface of BiVO4 photoanode to achieve efficient PEC oxygen evolution. Benefiting from the ultrasmall size of Ni2P nanoparticles (NPs), they can be uniformly decorated on the porous BiVO4 via a drop-casting method. The incorporation of Ni2P NPs can increase photocurrent density up to 1.2 mA/cm2 at 1.23V vs. RHE, corresponding to at least 50% enhancement in comparison to the pristine BiVO4. It has been considering that Ni2P can improve the hole injection efficiency and reduce the charge transfer resistance on the BiVO4. The findings of this work noted the advantages of Ni2P NPs cocatalyst as a novel route for modulating water oxidation performance. |
