Ultrathin hematite photoanode with gradient Ti doping
The poor photoelectrochemical (PEC) performance derived from insufficient charge separation in hematite photoanode crucially limits its application. Gradient doping with band bending in a large region is then considered as a promising strategy, facilitating the charge transfer ability due to the bui...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/145495 |
| _version_ | 1826121975284629504 |
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| author | Liu, Pengfei Wang, Chongwu Wang, Lijie Wu, Xuefeng Zheng, Lirong Yang, Hua Gui |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Liu, Pengfei Wang, Chongwu Wang, Lijie Wu, Xuefeng Zheng, Lirong Yang, Hua Gui |
| author_sort | Liu, Pengfei |
| collection | NTU |
| description | The poor photoelectrochemical (PEC) performance derived from insufficient charge separation in hematite photoanode crucially limits its application. Gradient doping with band bending in a large region is then considered as a promising strategy, facilitating the charge transfer ability due to the built-in electric field. Herein, we developed a synthetic strategy to prepare gradient Ti-doped ultrathin hematite photoelectrode and systematically investigated its PEC performance. The as-synthesized electrode (1.5-6.0% doping level from the surface to the substrate) delivered a photocurrent of about 1.30 mA cm-2 at 1.23 V versus the reversible hydrogen electrode (RHE), which is nearly 100% higher than that of homogeneously doped hematite electrode. The enhanced charge transfer property, induced by the energy band bending due to the built-in electric field, has been further confirmed by electrochemical measurements. This strategy of gradient doping should be adaptable and can be applied for other functional materials in various fields. |
| first_indexed | 2024-10-01T05:40:56Z |
| format | Journal Article |
| id | ntu-10356/145495 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:40:56Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1454952020-12-23T02:03:21Z Ultrathin hematite photoanode with gradient Ti doping Liu, Pengfei Wang, Chongwu Wang, Lijie Wu, Xuefeng Zheng, Lirong Yang, Hua Gui School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Charge Transfer Electrodes The poor photoelectrochemical (PEC) performance derived from insufficient charge separation in hematite photoanode crucially limits its application. Gradient doping with band bending in a large region is then considered as a promising strategy, facilitating the charge transfer ability due to the built-in electric field. Herein, we developed a synthetic strategy to prepare gradient Ti-doped ultrathin hematite photoelectrode and systematically investigated its PEC performance. The as-synthesized electrode (1.5-6.0% doping level from the surface to the substrate) delivered a photocurrent of about 1.30 mA cm-2 at 1.23 V versus the reversible hydrogen electrode (RHE), which is nearly 100% higher than that of homogeneously doped hematite electrode. The enhanced charge transfer property, induced by the energy band bending due to the built-in electric field, has been further confirmed by electrochemical measurements. This strategy of gradient doping should be adaptable and can be applied for other functional materials in various fields. Published version 2020-12-23T02:03:21Z 2020-12-23T02:03:21Z 2020 Journal Article Liu, P., Wang, C., Wang, L., Wu, X., Zheng, L., & Yang, H. G. (2020). Ultrathin hematite photoanode with gradient Ti doping. Research, 2020, 5473217-. doi:10.34133/2020/5473217 2096-5168 https://hdl.handle.net/10356/145495 10.34133/2020/5473217 32181447 2020 en Research © 2020 Pengfei Liu et al. Exclusive Licensee Science and Technology Review Publishing House. Distributed under a Creative Commons Attribution License (CC BY 4.0). application/pdf |
| spellingShingle | Engineering::Electrical and electronic engineering Charge Transfer Electrodes Liu, Pengfei Wang, Chongwu Wang, Lijie Wu, Xuefeng Zheng, Lirong Yang, Hua Gui Ultrathin hematite photoanode with gradient Ti doping |
| title | Ultrathin hematite photoanode with gradient Ti doping |
| title_full | Ultrathin hematite photoanode with gradient Ti doping |
| title_fullStr | Ultrathin hematite photoanode with gradient Ti doping |
| title_full_unstemmed | Ultrathin hematite photoanode with gradient Ti doping |
| title_short | Ultrathin hematite photoanode with gradient Ti doping |
| title_sort | ultrathin hematite photoanode with gradient ti doping |
| topic | Engineering::Electrical and electronic engineering Charge Transfer Electrodes |
| url | https://hdl.handle.net/10356/145495 |
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