Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction
Developing non-precious-metal electrocatalysts that can operate with a low overpotential at a high current density for industrial application is challenging. Heterogeneous bimetallic phosphides have attracted much interest. Despite high hydrogen evolution reaction (HER) performance, the ordinary oxy...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/178844 |
| _version_ | 1811697643135434752 |
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| author | Li, Zhong Xu, Chengshuang Zhang, Zheye Xia, Shan Li, Dongsheng Liu, Liren Chen, Peng Dong, Xiaochen |
| author2 | School of Chemistry, Chemical Engineering and Biotechnology |
| author_facet | School of Chemistry, Chemical Engineering and Biotechnology Li, Zhong Xu, Chengshuang Zhang, Zheye Xia, Shan Li, Dongsheng Liu, Liren Chen, Peng Dong, Xiaochen |
| author_sort | Li, Zhong |
| collection | NTU |
| description | Developing non-precious-metal electrocatalysts that can operate with a low overpotential at a high current density for industrial application is challenging. Heterogeneous bimetallic phosphides have attracted much interest. Despite high hydrogen evolution reaction (HER) performance, the ordinary oxygen evolution reaction (OER) performance hinders their practical use. Herein, it is shown that Fe-doping reverses and enlarges the interfacial electrical field at the heterojunction, turning the H intermediate favorable binding sites for HER into O intermediate favorable sites for OER. Specifically, the self-supported heterojunction catalysts on nickel foam (CoP@Ni2P/NF and Fe-CoP@Fe-Ni2P/NF) are readily synthesized. They only require the overpotentials of 266 and 274 mV to drive a large current density of 1000 mA cm-2 (j1000) for HER and OER, respectively. Furthermore, a water splitting cell equipped with these electrodes only requires a voltage of 1.724 V to drive j1000 with excellent durability, demonstrating the potential of industrial application. This work offers new insights on interfacial engineering for heterojunction catalysts. |
| first_indexed | 2024-10-01T07:58:31Z |
| format | Journal Article |
| id | ntu-10356/178844 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:58:31Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1788442024-07-12T15:31:49Z Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction Li, Zhong Xu, Chengshuang Zhang, Zheye Xia, Shan Li, Dongsheng Liu, Liren Chen, Peng Dong, Xiaochen School of Chemistry, Chemical Engineering and Biotechnology Institute for Digital Molecular Analytics and Science Engineering Heterojunction catalysts Interfacial engineering Developing non-precious-metal electrocatalysts that can operate with a low overpotential at a high current density for industrial application is challenging. Heterogeneous bimetallic phosphides have attracted much interest. Despite high hydrogen evolution reaction (HER) performance, the ordinary oxygen evolution reaction (OER) performance hinders their practical use. Herein, it is shown that Fe-doping reverses and enlarges the interfacial electrical field at the heterojunction, turning the H intermediate favorable binding sites for HER into O intermediate favorable sites for OER. Specifically, the self-supported heterojunction catalysts on nickel foam (CoP@Ni2P/NF and Fe-CoP@Fe-Ni2P/NF) are readily synthesized. They only require the overpotentials of 266 and 274 mV to drive a large current density of 1000 mA cm-2 (j1000) for HER and OER, respectively. Furthermore, a water splitting cell equipped with these electrodes only requires a voltage of 1.724 V to drive j1000 with excellent durability, demonstrating the potential of industrial application. This work offers new insights on interfacial engineering for heterojunction catalysts. Published version The authors would like to thank financial support by The International Postdoctoral Exchange Fellowship Program (No. PC2021035), a grant (#022116-00001) from the Centre for Hydrogen Innovations at National University of Singapore, Adjunct Talent Fund of Zhejiang Provincial People’s Hospital, and the 111 Project (D20015). 2024-07-09T01:13:45Z 2024-07-09T01:13:45Z 2024 Journal Article Li, Z., Xu, C., Zhang, Z., Xia, S., Li, D., Liu, L., Chen, P. & Dong, X. (2024). Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction. Advanced Science, 11(21), e2308477-. https://dx.doi.org/10.1002/advs.202308477 2198-3844 https://hdl.handle.net/10356/178844 10.1002/advs.202308477 38590138 2-s2.0-85189829330 21 11 e2308477 en Advanced Science © 2024 The Authors. Advanced Science published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. application/pdf |
| spellingShingle | Engineering Heterojunction catalysts Interfacial engineering Li, Zhong Xu, Chengshuang Zhang, Zheye Xia, Shan Li, Dongsheng Liu, Liren Chen, Peng Dong, Xiaochen Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title | Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title_full | Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title_fullStr | Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title_full_unstemmed | Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title_short | Reversing the interfacial electric field in metal phosphide heterojunction by Fe-doping for large-current oxygen evolution reaction |
| title_sort | reversing the interfacial electric field in metal phosphide heterojunction by fe doping for large current oxygen evolution reaction |
| topic | Engineering Heterojunction catalysts Interfacial engineering |
| url | https://hdl.handle.net/10356/178844 |
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