Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater
Abstract Cobalt phosphides attract broad attention as alternatives to platinum‐based materials towards hydrogen evolution reaction (HER). The catalytic performance of cobalt phosphides largely depends on the phase structure, but figuring out the optimal phase towards HER remains challenging due to t...
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Wiley
2024-08-01
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| Online Access: | https://doi.org/10.1002/elt2.58 |
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| author | Guo Huang Yujin Huang Asad Ali Zhijie Chen Pei Kang Shen Bing‐Jie Ni Jinliang Zhu |
| author_facet | Guo Huang Yujin Huang Asad Ali Zhijie Chen Pei Kang Shen Bing‐Jie Ni Jinliang Zhu |
| author_sort | Guo Huang |
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| description | Abstract Cobalt phosphides attract broad attention as alternatives to platinum‐based materials towards hydrogen evolution reaction (HER). The catalytic performance of cobalt phosphides largely depends on the phase structure, but figuring out the optimal phase towards HER remains challenging due to their diverse stoichiometries. In our work, a series of cobalt phosphide nanoparticles with different phase structures but similar particle sizes (CoP‐Co2P, Co2P‐Co, Co2P, and CoP) on a porous carbon network (PC) were accurately synthesized. The CoP‐Co2P/PC heterostructure demonstrates upgraded HER catalytic activity with a low overpotential of 96.7 and 162.1 mV at 10 mA cm−2 in 1 M KOH and 1 M phosphate‐buffered saline solution, respectively, with a long‐term (120 h) durability. In addition, the CoP‐Co2P/PC exhibits good HER performance in alkaline seawater, with a small overpotential of 111.2 mV at 10 mA cm−2 and a low Tafel slope of 64.2 mV dec−1, as well as promising stability. Density functional theory results show that the Co2P side of the CoP‐Co2P/PC heterostructure has the best Gibbs free energy of each step for HER, which contributes to the high HER activity. This study sets the stage for the advancement of high‐performance HER electrocatalysts and the implementation of large‐scale seawater electrolysis. |
| format | Article |
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| institution | OA Journals |
| issn | 2751-2606 2751-2614 |
| language | English |
| publishDate | 2024-08-01 |
| publisher | Wiley |
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| spelling | doaj-art-3a944063e57b400a83101f5eb179c87d2025-08-20T02:09:25ZengWileyElectron2751-26062751-26142024-08-0123n/an/a10.1002/elt2.58Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawaterGuo Huang0Yujin Huang1Asad Ali2Zhijie Chen3Pei Kang Shen4Bing‐Jie Ni5Jinliang Zhu6School of Resources, Environment and Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi University Nanning ChinaSchool of Resources, Environment and Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi University Nanning ChinaSchool of Resources, Environment and Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi University Nanning ChinaSchool of Civil and Environmental Engineering The University of New South Wales Sydney New South Wales AustraliaSchool of Resources, Environment and Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi University Nanning ChinaSchool of Civil and Environmental Engineering The University of New South Wales Sydney New South Wales AustraliaSchool of Resources, Environment and Materials MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials Guangxi University Nanning ChinaAbstract Cobalt phosphides attract broad attention as alternatives to platinum‐based materials towards hydrogen evolution reaction (HER). The catalytic performance of cobalt phosphides largely depends on the phase structure, but figuring out the optimal phase towards HER remains challenging due to their diverse stoichiometries. In our work, a series of cobalt phosphide nanoparticles with different phase structures but similar particle sizes (CoP‐Co2P, Co2P‐Co, Co2P, and CoP) on a porous carbon network (PC) were accurately synthesized. The CoP‐Co2P/PC heterostructure demonstrates upgraded HER catalytic activity with a low overpotential of 96.7 and 162.1 mV at 10 mA cm−2 in 1 M KOH and 1 M phosphate‐buffered saline solution, respectively, with a long‐term (120 h) durability. In addition, the CoP‐Co2P/PC exhibits good HER performance in alkaline seawater, with a small overpotential of 111.2 mV at 10 mA cm−2 and a low Tafel slope of 64.2 mV dec−1, as well as promising stability. Density functional theory results show that the Co2P side of the CoP‐Co2P/PC heterostructure has the best Gibbs free energy of each step for HER, which contributes to the high HER activity. This study sets the stage for the advancement of high‐performance HER electrocatalysts and the implementation of large‐scale seawater electrolysis.https://doi.org/10.1002/elt2.58cobalt phosphideselectrocatalystsheterostructuresporous carbonseawater electrolysis |
| spellingShingle | Guo Huang Yujin Huang Asad Ali Zhijie Chen Pei Kang Shen Bing‐Jie Ni Jinliang Zhu Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater Electron cobalt phosphides electrocatalysts heterostructures porous carbon seawater electrolysis |
| title | Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| title_full | Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| title_fullStr | Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| title_full_unstemmed | Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| title_short | Phase‐controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| title_sort | phase controllable cobalt phosphide heterostructure for efficient electrocatalytic hydrogen evolution in water and seawater |
| topic | cobalt phosphides electrocatalysts heterostructures porous carbon seawater electrolysis |
| url | https://doi.org/10.1002/elt2.58 |
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