DOI: 10.1002/cctc.201200472. Efficient BiVO<sub>4</sub> Thin Film Photoanodes Modified with Cobalt Phosphate Catalyst and W‐doping

Efficient BiVO4 Thin Film Photoanodes Modified with Cobalt Phosphate Catalyst and W‐doping

10.1002/cctc.201200472

Crossref journal-article

Wiley

ChemCatChem (311)

Abstract

AbstractBismuth vanadate (BiVO4) thin film photoanodes for light‐induced water oxidation are deposited by a low‐cost and scalable spray pyrolysis method. The resulting films are of high quality, as indicated by an internal quantum efficiency close to 100 % between 360 and 450 nm. However, its performance under AM1.5 illumination is limited by slow water oxidation kinetics. This can be addressed by using cobalt phosphate (Co‐Pi) as a water oxidation co‐catalyst. Electrodeposition of 30 nm Co‐Pi catalyst on the surface of BiVO4 increases the water oxidation efficiency from ≈30 % to more than 90 % at potentials higher than 1.2 V vs. a reversible hydrogen electrode (RHE). Once the surface catalysis limitation is removed, the performance of the photoanode is limited by low charge separation efficiency; more than 60 % of the electron‐hole pairs recombine before reaching the respective interfaces. Slow electron transport is shown to be the main cause of this low efficiency. We show that this can be remedied by introducing W as a donor type dopant in BiVO4, resulting in an AM1.5 photocurrent of ≈2.3 mA cm−2 at 1.23 V vs. RHE for 1 % W‐doped Co‐Pi‐catalyzed BiVO4.

Bibliography

Abdi, F. F., Firet, N., & vanâdeâKrol, R. (2012). Efficient BiVO4 Thin Film Photoanodes Modified with Cobalt Phosphate Catalyst and Wâdoping. ChemCatChem, 5(2), 490â496. Portico.

Authors 3

Fatwa F. Abdi (first)
Nienke Firet (additional)
Roel van de Krol (additional)

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Dates

Type	When
Created	12 years, 9 months ago (Nov. 30, 2012, 3:18 p.m.)
Deposited	1 year, 11 months ago (Sept. 12, 2023, 4:41 a.m.)
Indexed	2 weeks, 4 days ago (Aug. 19, 2025, 6:04 a.m.)
Issued	12 years, 9 months ago (Nov. 30, 2012)
Published	12 years, 9 months ago (Nov. 30, 2012)
Published Online	12 years, 9 months ago (Nov. 30, 2012)
Published Print	12 years, 7 months ago (Feb. 1, 2013)

Funders 0

None

BibTeX

@article{Abdi_2012, title={Efficient BiVO4 Thin Film Photoanodes Modified with Cobalt Phosphate Catalyst and W‐doping}, volume={5}, ISSN={1867-3899}, url={http://dx.doi.org/10.1002/cctc.201200472}, DOI={10.1002/cctc.201200472}, number={2}, journal={ChemCatChem}, publisher={Wiley}, author={Abdi, Fatwa F. and Firet, Nienke and van de Krol, Roel}, year={2012}, month=nov, pages={490–496} }

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