Spray-deposited Co-Pi catalyzed BiVO 4: A low-cost route towards highly efficient photoanodes

Fatwa F. Abdi; Nienke Firet; Ali Dabirian; Roel Van De Krol

doi:10.1557/opl.2012.811

Spray-deposited Co-Pi catalyzed BiVO ₄: A low-cost route towards highly efficient photoanodes

Fatwa F. Abdi, Nienke Firet, Ali Dabirian, Roel Van De Krol

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

32 Citations (Scopus)

Abstract

Bismuth vanadate (BiVO ₄) thin films are deposited by a low-cost and scalable spray pyrolysis method. Its performance under AM1.5 illumination is mainly limited by slow water oxidation kinetics. We confirm that cobalt phosphate (Co-Pi) is an efficient water oxidation catalyst for BiVO ₄. The optimum thickness of BiVO ₄ is 300 nm, resulting in an AM1.5 photocurrent of 1.9 mA/cm ² at 1.23 V vs. RHE when catalyzed with Co-Pi. Once the water oxidation limitation is removed, the performance is limited by low charge separation efficiency. This causes more than 60% of the electron-hole pairs to recombine before reaching the respective interfaces. The slow electron transport is shown to be the main cause of this low efficiency, and future efforts should therefore be focused on addressing this key limitation. © 2012 Materials Research Society.

Original language	English
Title of host publication	Materials for Catalysis in Energy
Pages	7-12
Volume	1446
DOIs	https://doi.org/10.1557/opl.2012.811
Publication status	Published - 2012
Externally published	Yes
Event	2012 MRS Spring Meeting - San Francisco, CA, United States Duration: 9 Apr 2012 → 13 Apr 2012

Publication series

Name	Materials Research Society Symposium Proceedings
Volume	1446
ISSN (Print)	0272-9172

Conference

Conference	2012 MRS Spring Meeting
Place	United States
City	San Francisco, CA
Period	9/04/12 → 13/04/12

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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title = "Spray-deposited Co-Pi catalyzed BiVO 4: A low-cost route towards highly efficient photoanodes",

abstract = "Bismuth vanadate (BiVO 4) thin films are deposited by a low-cost and scalable spray pyrolysis method. Its performance under AM1.5 illumination is mainly limited by slow water oxidation kinetics. We confirm that cobalt phosphate (Co-Pi) is an efficient water oxidation catalyst for BiVO 4. The optimum thickness of BiVO 4 is 300 nm, resulting in an AM1.5 photocurrent of 1.9 mA/cm 2 at 1.23 V vs. RHE when catalyzed with Co-Pi. Once the water oxidation limitation is removed, the performance is limited by low charge separation efficiency. This causes more than 60% of the electron-hole pairs to recombine before reaching the respective interfaces. The slow electron transport is shown to be the main cause of this low efficiency, and future efforts should therefore be focused on addressing this key limitation. {\textcopyright} 2012 Materials Research Society.",

author = "Abdi, {Fatwa F.} and Nienke Firet and Ali Dabirian and {Van De Krol}, Roel",

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Abdi, FF, Firet, N, Dabirian, A & Van De Krol, R 2012, Spray-deposited Co-Pi catalyzed BiVO ₄: A low-cost route towards highly efficient photoanodes. in Materials for Catalysis in Energy. vol. 1446, Materials Research Society Symposium Proceedings, vol. 1446, pp. 7-12, 2012 MRS Spring Meeting, San Francisco, CA, United States, 9/04/12. https://doi.org/10.1557/opl.2012.811

Spray-deposited Co-Pi catalyzed BiVO ₄: A low-cost route towards highly efficient photoanodes. / Abdi, Fatwa F.; Firet, Nienke; Dabirian, Ali et al.
Materials for Catalysis in Energy. Vol. 1446 2012. p. 7-12 (Materials Research Society Symposium Proceedings; Vol. 1446).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - Bismuth vanadate (BiVO 4) thin films are deposited by a low-cost and scalable spray pyrolysis method. Its performance under AM1.5 illumination is mainly limited by slow water oxidation kinetics. We confirm that cobalt phosphate (Co-Pi) is an efficient water oxidation catalyst for BiVO 4. The optimum thickness of BiVO 4 is 300 nm, resulting in an AM1.5 photocurrent of 1.9 mA/cm 2 at 1.23 V vs. RHE when catalyzed with Co-Pi. Once the water oxidation limitation is removed, the performance is limited by low charge separation efficiency. This causes more than 60% of the electron-hole pairs to recombine before reaching the respective interfaces. The slow electron transport is shown to be the main cause of this low efficiency, and future efforts should therefore be focused on addressing this key limitation. © 2012 Materials Research Society.

AB - Bismuth vanadate (BiVO 4) thin films are deposited by a low-cost and scalable spray pyrolysis method. Its performance under AM1.5 illumination is mainly limited by slow water oxidation kinetics. We confirm that cobalt phosphate (Co-Pi) is an efficient water oxidation catalyst for BiVO 4. The optimum thickness of BiVO 4 is 300 nm, resulting in an AM1.5 photocurrent of 1.9 mA/cm 2 at 1.23 V vs. RHE when catalyzed with Co-Pi. Once the water oxidation limitation is removed, the performance is limited by low charge separation efficiency. This causes more than 60% of the electron-hole pairs to recombine before reaching the respective interfaces. The slow electron transport is shown to be the main cause of this low efficiency, and future efforts should therefore be focused on addressing this key limitation. © 2012 Materials Research Society.

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