Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media
Work function strongly impacts the surficial charge distribution, especially for metal-support electrocatalysts when a built-in electric field (BEF) is constructed. Therefore, studying the correlation between work function and BEF is crucial for understanding the intrinsic reaction mechanism. Herein...
| 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/10356/162162 |
| _version_ | 1824454634650992640 |
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| author | Zhai, Lingling She, Xiaojie Zhuang, Lyuchao Li, Yanyong Ding, Ran Guo, Xuyun Zhang, Yongqi Zhu, Ye Xu, Kun Fan, Hong Jin Lau, Shu Ping |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhai, Lingling She, Xiaojie Zhuang, Lyuchao Li, Yanyong Ding, Ran Guo, Xuyun Zhang, Yongqi Zhu, Ye Xu, Kun Fan, Hong Jin Lau, Shu Ping |
| author_sort | Zhai, Lingling |
| collection | NTU |
| description | Work function strongly impacts the surficial charge distribution, especially for metal-support electrocatalysts when a built-in electric field (BEF) is constructed. Therefore, studying the correlation between work function and BEF is crucial for understanding the intrinsic reaction mechanism. Herein, we present a Pt@CoOx electrocatalyst with a large work function difference (ΔΦ) and strong BEF, which shows outstanding hydrogen evolution activity in a neutral medium with a 4.5-fold mass activity higher than 20 % Pt/C. Both experimental and theoretical results confirm the interfacial charge redistribution induced by the strong BEF, thus subtly optimizing hydrogen and hydroxide adsorption energy. This work not only provides fresh insights into the neutral hydrogen evolution mechanism but also proposes new design principles toward efficient electrocatalysts for hydrogen production in a neutral medium. |
| first_indexed | 2025-02-19T03:25:26Z |
| format | Journal Article |
| id | ntu-10356/162162 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:25:26Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1621622022-10-06T06:53:09Z Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media Zhai, Lingling She, Xiaojie Zhuang, Lyuchao Li, Yanyong Ding, Ran Guo, Xuyun Zhang, Yongqi Zhu, Ye Xu, Kun Fan, Hong Jin Lau, Shu Ping School of Physical and Mathematical Sciences Science::Physics Built-in ElectricField Electrocatalysis Work function strongly impacts the surficial charge distribution, especially for metal-support electrocatalysts when a built-in electric field (BEF) is constructed. Therefore, studying the correlation between work function and BEF is crucial for understanding the intrinsic reaction mechanism. Herein, we present a Pt@CoOx electrocatalyst with a large work function difference (ΔΦ) and strong BEF, which shows outstanding hydrogen evolution activity in a neutral medium with a 4.5-fold mass activity higher than 20 % Pt/C. Both experimental and theoretical results confirm the interfacial charge redistribution induced by the strong BEF, thus subtly optimizing hydrogen and hydroxide adsorption energy. This work not only provides fresh insights into the neutral hydrogen evolution mechanism but also proposes new design principles toward efficient electrocatalysts for hydrogen production in a neutral medium. Agency for Science, Technology and Research (A*STAR) This work was financially supported by the Research Grants Council of Hong Kong (Poly U253009/18P) and the Hong Kong Polytechnic University (1-ZVGH). H.J.F. thanks the financial support from Agency for Science, Technology, and Research (A*STAR), Singapore by AME Individual Research Grants (A1983c0026). 2022-10-06T06:53:09Z 2022-10-06T06:53:09Z 2022 Journal Article Zhai, L., She, X., Zhuang, L., Li, Y., Ding, R., Guo, X., Zhang, Y., Zhu, Y., Xu, K., Fan, H. J. & Lau, S. P. (2022). Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media. Angewandte Chemie International Edition, 61(14), e202116057-. https://dx.doi.org/10.1002/anie.202116057 1433-7851 https://hdl.handle.net/10356/162162 10.1002/anie.202116057 35072330 2-s2.0-85124600170 14 61 e202116057 en A1983c0026 Angewandte Chemie International Edition © 2022 Wiley-VCHGmbH. All rights reserved. |
| spellingShingle | Science::Physics Built-in ElectricField Electrocatalysis Zhai, Lingling She, Xiaojie Zhuang, Lyuchao Li, Yanyong Ding, Ran Guo, Xuyun Zhang, Yongqi Zhu, Ye Xu, Kun Fan, Hong Jin Lau, Shu Ping Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title_full | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title_fullStr | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title_full_unstemmed | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title_short | Modulating built-in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| title_sort | modulating built in electric field via variable oxygen affinity for robust hydrogen evolution reaction in neutral media |
| topic | Science::Physics Built-in ElectricField Electrocatalysis |
| url | https://hdl.handle.net/10356/162162 |
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