Porous BiVO4 coupled with CuFeO2 and NiFe layered double hydroxide as highly-efficient photoanode toward boosted photoelectrochemical water oxidation

In this paper, the monoclinic bismuth vanadate photoanode with porous structure prepared from successive electrodeposition and metal organic decomposition (MOD) method used as photoanode for photoelectrochemical (PEC) water oxidation. The p-type CuFeO2 ultrathin layer is coupled to form a p-n heterojunction, further promoting charge transfer and inhibit carrier recombination. The NiFe layered double hydroxide (NiFe-LDH) is electrodeposited as oxygen evolution cocatalyst (OEC) for the hole extraction for the water oxidation. Therefore, the BVO/CFO/NiFe LDH heterostructure photoanode exhibits the boosted PEC performance, achieving the a photocurrent density of 4.34 mA.cm(-2) at 1.23 V vs RHE and enhanced photoconversion efficiency of 2.48%, which is 3.78 and 5.28 times higher than that of pristine of BiVO4. The heterostructure photoanode exhibits excellent PEC activity, which can provide a promising and simple strategy for fabricating photoanodes with highefficiency oxygen release promoters.