Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/145032
Title: Understanding the roles of NiOx in enhancing the photoelectrochemical performance of BiVO4 photoanodes for solar water splitting
Authors: Zhang, Mengyuan
Antony, Rajini P.
Chiam, Sing Yang
Abdi, Fatwa Firdaus
Wong, Lydia Helena
Keywords: Engineering::Materials
Issue Date: 2019
Source: Zhang, M., Antony, R. P., Chiam, S. Y., Abdi, F. F., & Wong, L. H. (2019). Understanding the roles of NiOx in enhancing the photoelectrochemical performance of BiVO4 photoanodes for solar water splitting. ChemSusChem, 12(9), 2022-2028. doi:10.1002/cssc.201801780
Journal: ChemSusChem
Abstract: Solar water oxidation is considered as a promising method for efficient utilization of solar energy and bismuth vanadate (BiVO4) is a potential photoanode. Catalyst loading on BiVO4 is often used to tackle the limitations of charge recombination and sluggish kinetics. In this study, amorphous nickel oxide (NiOx) is loaded onto Mo‐doped BiVO4 by photochemical metal–organic deposition method. The resulting NiOx/Mo:BiVO4 photoanodes demonstrate a two‐fold improvement in photocurrent density (2.44 mA cm−2) at 1.23 V versus reversible hydrogen electrode (RHE) compared with the uncatalyzed samples. After NiOx modification the charge‐separation and charge‐transfer efficiencies improve significantly across the entire potential range. It is further elucidated by open‐circuit photovoltage (OCP), time‐resolved‐microwave conductivity (TRMC), and rapid‐scan voltammetry (RSV) measurements that NiOx modification induces larger band bending and promotes efficient charge transfer on the surface of BiVO4. This work provides insight into designing BiVO4‐catalyst assemblies by using a simple surface‐modification route for efficient solar water oxidation.
URI: https://hdl.handle.net/10356/145032
ISSN: 1864-564X
DOI: 10.1002/cssc.201801780
Rights: This is the accepted version of the following article: Zhang, M., Antony, R. P., Chiam, S. Y., Abdi, F. F., & Wong, L. H. (2019). Understanding the roles of NiOx in enhancing the photoelectrochemical performance of BiVO4 photoanodes for solar water splitting. ChemSusChem, 12(9), 2022-2028. doi:10.1002/cssc.201801780, which has been published in final form athttps://doi.org/10.1002/cssc.201801780. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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