Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution
Transition metal phosphides are promising alternatives to the precious metal catalysts for various electrocatalysis applications. Controllable and precise surface engineering of electrocatalysts is the key challenge to enhance their performance. Herein, we demonstrate an ion-exchange strategy to pro...
| Main Authors: | , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/154719 |
| _version_ | 1824455467379720192 |
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| author | Xu, Rongrong Jiang, Tengfei Fu, Zheng Cheng, Ningyan Zhang, Xingxiu Zhu, Kun Xue, Huaiguo Wang, Wenjun Tian, Jingqi Chen, Peng |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Xu, Rongrong Jiang, Tengfei Fu, Zheng Cheng, Ningyan Zhang, Xingxiu Zhu, Kun Xue, Huaiguo Wang, Wenjun Tian, Jingqi Chen, Peng |
| author_sort | Xu, Rongrong |
| collection | NTU |
| description | Transition metal phosphides are promising alternatives to the precious metal catalysts for various electrocatalysis applications. Controllable and precise surface engineering of electrocatalysts is the key challenge to enhance their performance. Herein, we demonstrate an ion-exchange strategy to produce cobalt phosphide nanowires which have a conductive core and a thickness-controlled surface layer with sulfur dopants, phosphorus vacancies, and amorphous domains. They are applied for hydrogen evolution reaction with high stability, achieving a current density of 100 mA cm-2 at an overpotential of 114 mV. Based on both comprehensive state-of-the-art experimental characterizations and theoretical investigations, the excellent catalytic performance is attributed to increased active sites, facilitated charge transfer and transport, as well as weakened H adsorption and strengthened H2O adsorption due to the synergistic effects of S dopants and P vacancies. |
| first_indexed | 2025-02-19T03:38:40Z |
| format | Journal Article |
| id | ntu-10356/154719 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:38:40Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1547192022-01-14T07:00:44Z Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution Xu, Rongrong Jiang, Tengfei Fu, Zheng Cheng, Ningyan Zhang, Xingxiu Zhu, Kun Xue, Huaiguo Wang, Wenjun Tian, Jingqi Chen, Peng School of Chemical and Biomedical Engineering Engineering::Chemical engineering Surface Engineering Confined Doping Transition metal phosphides are promising alternatives to the precious metal catalysts for various electrocatalysis applications. Controllable and precise surface engineering of electrocatalysts is the key challenge to enhance their performance. Herein, we demonstrate an ion-exchange strategy to produce cobalt phosphide nanowires which have a conductive core and a thickness-controlled surface layer with sulfur dopants, phosphorus vacancies, and amorphous domains. They are applied for hydrogen evolution reaction with high stability, achieving a current density of 100 mA cm-2 at an overpotential of 114 mV. Based on both comprehensive state-of-the-art experimental characterizations and theoretical investigations, the excellent catalytic performance is attributed to increased active sites, facilitated charge transfer and transport, as well as weakened H adsorption and strengthened H2O adsorption due to the synergistic effects of S dopants and P vacancies. Agency for Science, Technology and Research (A*STAR) Ministry of Education (MOE) This research is financially supported by the National Natural Science Foundation of China (21703201), the Natural Science Foundation of Jiangsu Province (Grant No. BK20170486), Six Talent Peaks Project in Jiangsu Province (2019-XCL-101), AME-IRG grant (AMEIRG18-0016) from Agency for Science, Technology and Research (A*STAR) of Singapore and AcRF tier 2 grant (MOE2017-T2-2-005) from Ministry of Education (Singapore). 2022-01-05T05:59:35Z 2022-01-05T05:59:35Z 2020 Journal Article Xu, R., Jiang, T., Fu, Z., Cheng, N., Zhang, X., Zhu, K., Xue, H., Wang, W., Tian, J. & Chen, P. (2020). Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution. Nano Energy, 78, 105347-. https://dx.doi.org/10.1016/j.nanoen.2020.105347 2211-2855 https://hdl.handle.net/10356/154719 10.1016/j.nanoen.2020.105347 2-s2.0-85090417232 78 105347 en MOE2017-T2-2-005 Nano Energy © 2020 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Surface Engineering Confined Doping Xu, Rongrong Jiang, Tengfei Fu, Zheng Cheng, Ningyan Zhang, Xingxiu Zhu, Kun Xue, Huaiguo Wang, Wenjun Tian, Jingqi Chen, Peng Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title | Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title_full | Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title_fullStr | Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title_full_unstemmed | Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title_short | Ion-exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| title_sort | ion exchange controlled surface engineering of cobalt phosphide nanowires for enhanced hydrogen evolution |
| topic | Engineering::Chemical engineering Surface Engineering Confined Doping |
| url | https://hdl.handle.net/10356/154719 |
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