@article{Wang2022, 
author = {Songcan Wang and Boyan Liu and Xin Wang and Yingjuan Zhang and Wei Huang},
title = {Nanoporous MoO3−x/BiVO4 photoanodes promoting charge separation for efficient photoelectrochemical water splitting},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {8},
pages = {7026-7033},
keywords = {charge separation, heterojunction, water splitting, oxygen vacancies, bismuth vanadate},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4344-0},
doi = {10.1007/s12274-022-4344-0},
abstract = {Owing to the relatively short hole diffusion length, severe charge recombination in the bulk of bismuth vanadate (BiVO4) is the key issue for photoelectrochemical water splitting. Herein, we design a nanoporous MoO3−x/BiVO4 heterojunction photoanode to promote charge separation. The efficient electron transport properties of oxygen deficient MoO3−x and the nanoporous structure are beneficial for charge separation, leading to a significantly enhanced PEC performance. The optimized MoO3−x/BiVO4 heterojunction photoanode exhibits a photocurrent density of 5.07 mA·cm−2 for Na2SO3 oxidation. By depositing FeOOH/NiOOH dual oxygen evolution cocatalysts to promote surface kinetics, a high photocurrent density of 4.81 mA·cm−2 can be achieved for PEC water splitting, exhibiting an excellent applied bias photon-to-current efficiency of 1.57%. Moreover, stable overall water splitting is achieved under consecutive light illumination for 10 h. We provide a proof of concept for the design of efficient BiVO4-based heterojunction photoanodes for stable PEC water splitting.}
}