High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting
FeVO4 is a potential photoanode candidate with favorable bandgap energy for absorbing visible light in the solar spectrum. However, the achieved photocurrents are still much lower than the theoretical photocurrent due to poor bulk carrier separation efficiency. Herein, the aim is to improve FeVO4 ch...
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sg-ntu-dr.10356-1451252023-07-14T16:00:07Z High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting Nguyen, Thi Hiep Zhang, Mengyuan Septina, Wilman Ahmed, Mahmoud Gamal Tay, Ying Fan Abdi, Fatwa F. Wong, Lydia Helena School of Materials Science and Engineering Science Inkjet Printing Metal Doping FeVO4 is a potential photoanode candidate with favorable bandgap energy for absorbing visible light in the solar spectrum. However, the achieved photocurrents are still much lower than the theoretical photocurrent due to poor bulk carrier separation efficiency. Herein, the aim is to improve FeVO4 charge transport properties by searching for suitable metal doping using combinatorial methods. Thin‐film FeVO4 libraries with different doping ratios of Zn, Ni, Cr, Mo, and W are fabricated on fluorine doped tin oxide substrates using combinatorial inkjet printing and their photoelectrochemical properties screened using photoscanning droplet cell. Mo and W doping show higher current density compared with undoped FeVO4; whereas the photocurrent decreases for Ni‐ and Zn‐doped samples. The best photocurrent is achieved with 7% doping ratio of Cr. Cr is discovered as a promising dopant for the first time, which is more effective than reported Mo or W for FeVO4 photoanode. The replacement of Cr3+ to Fe3+ in FeVO4 crystal lattice helps to mainly improve the catalytic activity for charge transfer, which results in the enhancement of photoresponse of the FeVO4 photoanode. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version Tier 2 Project (MOE2016-T2- 1-030) 2020-12-11T08:44:02Z 2020-12-11T08:44:02Z 2020 Journal Article Nguyen, T. H., Zhang, M., Septina, W., Ahmed, M. G., Tay, Y. F., Abdi, F. F., & Wong, L. H. (2020). High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting. Solar RRL, 4(12), 2000437-. doi:10.1002/solr.202000437 2367-198X https://hdl.handle.net/10356/145125 10.1002/solr.202000437 12 4 2000437 en Solar RRL This is the accepted version of the following article: Nguyen, T. H., Zhang, M., Septina, W., Ahmed, M. G., Tay, Y. F., Abdi, F. F., & Wong, L. H. (2020). High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting. Solar RRL, 4(12), 2000437-. doi:10.1002/solr.202000437, which has been published in final form at https://doi.org/10.1002/solr.202000437. 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]. application/pdf |
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Science Inkjet Printing Metal Doping Nguyen, Thi Hiep Zhang, Mengyuan Septina, Wilman Ahmed, Mahmoud Gamal Tay, Ying Fan Abdi, Fatwa F. Wong, Lydia Helena High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
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FeVO4 is a potential photoanode candidate with favorable bandgap energy for absorbing visible light in the solar spectrum. However, the achieved photocurrents are still much lower than the theoretical photocurrent due to poor bulk carrier separation efficiency. Herein, the aim is to improve FeVO4 charge transport properties by searching for suitable metal doping using combinatorial methods. Thin‐film FeVO4 libraries with different doping ratios of Zn, Ni, Cr, Mo, and W are fabricated on fluorine doped tin oxide substrates using combinatorial inkjet printing and their photoelectrochemical properties screened using photoscanning droplet cell. Mo and W doping show higher current density compared with undoped FeVO4; whereas the photocurrent decreases for Ni‐ and Zn‐doped samples. The best photocurrent is achieved with 7% doping ratio of Cr. Cr is discovered as a promising dopant for the first time, which is more effective than reported Mo or W for FeVO4 photoanode. The replacement of Cr3+ to Fe3+ in FeVO4 crystal lattice helps to mainly improve the catalytic activity for charge transfer, which results in the enhancement of photoresponse of the FeVO4 photoanode. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Nguyen, Thi Hiep Zhang, Mengyuan Septina, Wilman Ahmed, Mahmoud Gamal Tay, Ying Fan Abdi, Fatwa F. Wong, Lydia Helena |
format |
Article |
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Nguyen, Thi Hiep Zhang, Mengyuan Septina, Wilman Ahmed, Mahmoud Gamal Tay, Ying Fan Abdi, Fatwa F. Wong, Lydia Helena |
author_sort |
Nguyen, Thi Hiep |
title |
High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
title_short |
High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
title_full |
High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
title_fullStr |
High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
title_full_unstemmed |
High throughput discovery of effective metal doping in FeVO4 for photoelectrochemical water splitting |
title_sort |
high throughput discovery of effective metal doping in fevo4 for photoelectrochemical water splitting |
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2020 |
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https://hdl.handle.net/10356/145125 |
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1773551418152583168 |