Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting
Heterostructures with abundant phase boundaries are compelling for surface-mediated electrochemical applications. However, rational design of such bifunctional electrocatalysts for efficient hydrogen and oxygen evolution reactions (HER and OER) is still challenging. Here, due to the well-matched lat...
| 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/10356/139609 |
| _version_ | 1826129749355790336 |
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| author | Liang, Qinghua Zhong, Lixiang Du, Chengfeng Luo, Yubo Zhao, Jin Zheng, Yun Xu, Jianwei Ma, Jianmin Liu, Chuntai Li, Shuzhou Yan, Qingyu |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Liang, Qinghua Zhong, Lixiang Du, Chengfeng Luo, Yubo Zhao, Jin Zheng, Yun Xu, Jianwei Ma, Jianmin Liu, Chuntai Li, Shuzhou Yan, Qingyu |
| author_sort | Liang, Qinghua |
| collection | NTU |
| description | Heterostructures with abundant phase boundaries are compelling for surface-mediated electrochemical applications. However, rational design of such bifunctional electrocatalysts for efficient hydrogen and oxygen evolution reactions (HER and OER) is still challenging. Here, due to the well-matched lattice parameters, we easily achieved the epitaxy of two-dimensional ternary nickel thiophosphate (NiPS3) nanosheets with in-grown dinickel phosphide (Ni2P) through an in situ growth strategy. Density functional theory calculations reveal that the NiPS3/Ni2P heterojunction significantly decreases the kinetic barrier for hydrogen adsorption and accelerates electron transfer due to the built-in electric field at the epitaxial interfaces. The significantly improved electrocatalytic performance is shown to be closely related to the epitaxial interfacial area rather than the amount of secondary phase. Notably, the resultant NiPS3/Ni2P heterostructures enable an overall water splitting electrolyzer to achieve 50 mA cm–2 at a lower bias of 1.65 V compared to that for the pristine NiPS3 alone (2.02 V) and even the benchmark Pt/C//IrO2 electrocatalysts (1.69 V). |
| first_indexed | 2024-10-01T07:45:37Z |
| format | Journal Article |
| id | ntu-10356/139609 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:45:37Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1396092023-07-14T16:01:39Z Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting Liang, Qinghua Zhong, Lixiang Du, Chengfeng Luo, Yubo Zhao, Jin Zheng, Yun Xu, Jianwei Ma, Jianmin Liu, Chuntai Li, Shuzhou Yan, Qingyu School of Materials Science & Engineering Science::Chemistry Epitaxial Interfaces Nickel Thiophosphate Heterostructures with abundant phase boundaries are compelling for surface-mediated electrochemical applications. However, rational design of such bifunctional electrocatalysts for efficient hydrogen and oxygen evolution reactions (HER and OER) is still challenging. Here, due to the well-matched lattice parameters, we easily achieved the epitaxy of two-dimensional ternary nickel thiophosphate (NiPS3) nanosheets with in-grown dinickel phosphide (Ni2P) through an in situ growth strategy. Density functional theory calculations reveal that the NiPS3/Ni2P heterojunction significantly decreases the kinetic barrier for hydrogen adsorption and accelerates electron transfer due to the built-in electric field at the epitaxial interfaces. The significantly improved electrocatalytic performance is shown to be closely related to the epitaxial interfacial area rather than the amount of secondary phase. Notably, the resultant NiPS3/Ni2P heterostructures enable an overall water splitting electrolyzer to achieve 50 mA cm–2 at a lower bias of 1.65 V compared to that for the pristine NiPS3 alone (2.02 V) and even the benchmark Pt/C//IrO2 electrocatalysts (1.69 V). MOE (Min. of Education, S’pore) Accepted version 2020-05-20T08:07:40Z 2020-05-20T08:07:40Z 2019 Journal Article Liang, Q., Zhong, L., Du, C., Luo, Y., Zhao, J., Zheng, Y., . . . Yan, Q. (2019). Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting. ACS Nano, 13(7), 7975-7984. doi:10.1021/acsnano.9b02510 1936-0851 https://hdl.handle.net/10356/139609 10.1021/acsnano.9b02510 31265235 2-s2.0-85070485505 7 13 7975 7984 en RG113/15 2016-T1-002-065 2017-T2-2-069 2018-T2-01-010 ACS Nano This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsnano.9b02510 application/pdf |
| spellingShingle | Science::Chemistry Epitaxial Interfaces Nickel Thiophosphate Liang, Qinghua Zhong, Lixiang Du, Chengfeng Luo, Yubo Zhao, Jin Zheng, Yun Xu, Jianwei Ma, Jianmin Liu, Chuntai Li, Shuzhou Yan, Qingyu Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title | Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title_full | Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title_fullStr | Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title_full_unstemmed | Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title_short | Interfacing epitaxial dinickel phosphide to 2D nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| title_sort | interfacing epitaxial dinickel phosphide to 2d nickel thiophosphate nanosheets for boosting electrocatalytic water splitting |
| topic | Science::Chemistry Epitaxial Interfaces Nickel Thiophosphate |
| url | https://hdl.handle.net/10356/139609 |
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