摘要
The sluggish kinetics for water oxidation is recognized as one of the major problems for the unsatisfied photoelectrochemical(PEC) performance. Herein, we developed a feasible strategy based on in-situ selective surface cation exchange, for activating surface water oxidation reactivity toward boosted PEC water oxidation of BiVO_(4) photoanodes with fundamentally improved surface charge transfer. The asconstructed Co/BiVO_(4) photoanodes exhibit 2.6 times increase in photocurrent density with superior stability, in comparison to those of pristine counterpart. Moreover, the faradaic efficiency of as-fabricated photoanode can be up to ~ 95% at 1.23 V(vs. RHE). The unique selective replacement of Bi by Co on the surface could modify the electronic structure of BiVO_(4) with reduced energy barrier of the deprotonation of OH^(+) to O, thus favoring the overall excellent PEC performance of Co/BiVO_(4) photoanode.
基金
supported by the project funded by the National Natural Science Foundation of China (52172222, 5197226 and 51972178)
the China Postdoctoral Science Foundation(2020 M681966)
the exchange project of the sixth ChinaNorthern Macedonia Science and Technology Meeting (6-11)
the Natural Science Foundation of Ningbo Municipal Government(202003 N4164 and 2021J145)。
