Insights into improving photoelectrochemical water-splitting performance using hematite anode
Designing an efficient photoanode is of great importance for photoassisted solar water splitting. Herein, a series of modifications to a nanorod structure hematite, to be used as anode for photoelectrochemical (PEC) water-splitting reactions is designed. Ti doping, oxygen vacancy formation by N2 tre...
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sg-ntu-dr.10356-1557552023-07-14T16:04:05Z Insights into improving photoelectrochemical water-splitting performance using hematite anode Devi, Hemam Rachna Ong, Boon Chong Zhao, Xin Dong, Zhili Nanda, Karuna Kar Chen, Zhong School of Materials Science and Engineering Engineering::Materials Doping Passivations Designing an efficient photoanode is of great importance for photoassisted solar water splitting. Herein, a series of modifications to a nanorod structure hematite, to be used as anode for photoelectrochemical (PEC) water-splitting reactions is designed. Ti doping, oxygen vacancy formation by N2 treatment, TiO2 passivation, and FeOOH cocatalyst decoration are explored for their roles and contributions to the improvement of the PEC water oxidation performance. It is found that Ti doping and N2 treatment can greatly increase the charge carrier density, which has boosted the photocurrent. TiO2 passivation enhances the photovoltage, resulting in a cathodic shift in the onset potential (≈170 mV with respect to prepassivation). Further, the FeOOH cocatalyst decoration improves the reaction kinetics, thereby improving the overall photoassisted water oxidation performance. Ministry of Education (MOE) Submitted/Accepted version The authors gratefully acknowledge DST-FIST, India (SR/FST/PSII-009/2010), and Ministry of Education, Singapore (RG15/16, RG16/18), for financial support. 2022-03-18T06:08:51Z 2022-03-18T06:08:51Z 2022 Journal Article Devi, H. R., Ong, B. C., Zhao, X., Dong, Z., Nanda, K. K. & Chen, Z. (2022). Insights into improving photoelectrochemical water-splitting performance using hematite anode. Energy Technology, 10(1), 2100457-. https://dx.doi.org/10.1002/ente.202100457 2194-4296 https://hdl.handle.net/10356/155755 10.1002/ente.202100457 2-s2.0-85113157453 1 10 2100457 en RG15/16 RG16/18 Energy Technology This is the peer reviewed version of the following article: Devi, H. R., Ong, B. C., Zhao, X., Dong, Z., Nanda, K. K. & Chen, Z. (2022). Insights into improving photoelectrochemical water-splitting performance using hematite anode. Energy Technology, 10(1), 2100457-, which has been published in final form at doi.org/10.1002/ente.202100457. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
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Engineering::Materials Doping Passivations Devi, Hemam Rachna Ong, Boon Chong Zhao, Xin Dong, Zhili Nanda, Karuna Kar Chen, Zhong Insights into improving photoelectrochemical water-splitting performance using hematite anode |
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Designing an efficient photoanode is of great importance for photoassisted solar water splitting. Herein, a series of modifications to a nanorod structure hematite, to be used as anode for photoelectrochemical (PEC) water-splitting reactions is designed. Ti doping, oxygen vacancy formation by N2 treatment, TiO2 passivation, and FeOOH cocatalyst decoration are explored for their roles and contributions to the improvement of the PEC water oxidation performance. It is found that Ti doping and N2 treatment can greatly increase the charge carrier density, which has boosted the photocurrent. TiO2 passivation enhances the photovoltage, resulting in a cathodic shift in the onset potential (≈170 mV with respect to prepassivation). Further, the FeOOH cocatalyst decoration improves the reaction kinetics, thereby improving the overall photoassisted water oxidation performance. |
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School of Materials Science and Engineering |
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School of Materials Science and Engineering Devi, Hemam Rachna Ong, Boon Chong Zhao, Xin Dong, Zhili Nanda, Karuna Kar Chen, Zhong |
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Article |
author |
Devi, Hemam Rachna Ong, Boon Chong Zhao, Xin Dong, Zhili Nanda, Karuna Kar Chen, Zhong |
author_sort |
Devi, Hemam Rachna |
title |
Insights into improving photoelectrochemical water-splitting performance using hematite anode |
title_short |
Insights into improving photoelectrochemical water-splitting performance using hematite anode |
title_full |
Insights into improving photoelectrochemical water-splitting performance using hematite anode |
title_fullStr |
Insights into improving photoelectrochemical water-splitting performance using hematite anode |
title_full_unstemmed |
Insights into improving photoelectrochemical water-splitting performance using hematite anode |
title_sort |
insights into improving photoelectrochemical water-splitting performance using hematite anode |
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2022 |
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https://hdl.handle.net/10356/155755 |
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1773551402680844288 |