Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution
Breaking the symmetry in catalysts through interface engineering has emerged as a new dimension in enhancing the catalytic performances, while the long-range asymmetry (i.e. in nanometer scale) in catalysts can hardly be achieved by alloying or doping. Herein, we introduce asymmetrical gradient effe...
| Main Authors: | , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/151707 |
| _version_ | 1824454070056779776 |
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| author | Zhou, Daojin Jia, Yin Duan, Xinxuan Tang, Jialun Xu, Jie Liu, Dong Xiong, Xuya Zhang, Junming Luo, Jun Zheng, Lirong Liu, Bin Kuang, Yun Sun, Xiaoming Duan, Xue |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Zhou, Daojin Jia, Yin Duan, Xinxuan Tang, Jialun Xu, Jie Liu, Dong Xiong, Xuya Zhang, Junming Luo, Jun Zheng, Lirong Liu, Bin Kuang, Yun Sun, Xiaoming Duan, Xue |
| author_sort | Zhou, Daojin |
| collection | NTU |
| description | Breaking the symmetry in catalysts through interface engineering has emerged as a new dimension in enhancing the catalytic performances, while the long-range asymmetry (i.e. in nanometer scale) in catalysts can hardly be achieved by alloying or doping. Herein, we introduce asymmetrical gradient effect into NiFe layered double hydroxide (NiFe-LDH) at nano scale via a simple nanoarray construction strategy on Ni foam substrate. The electron energy loss spectroscopy, extended X-Ray absorption fine structure and other characterizations together revealed the concentration and valence states gradients in NiFe-LDH nanoarrays. Subsequently, the gradient effect leads to distinctly optimized binding strength of active sites to oxygen evolution intermediates, better electron transfers and boosted oxygen evolution performances, which are absent in non-gradient NiFe-LDH catalysts. Such long-range gradient effects in nanoarray materials provide new opportunities to understand their boosted catalytic performances and to rationally design better catalytic materials. |
| first_indexed | 2025-02-19T03:16:28Z |
| format | Journal Article |
| id | ntu-10356/151707 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:16:28Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1517072021-07-21T10:55:06Z Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution Zhou, Daojin Jia, Yin Duan, Xinxuan Tang, Jialun Xu, Jie Liu, Dong Xiong, Xuya Zhang, Junming Luo, Jun Zheng, Lirong Liu, Bin Kuang, Yun Sun, Xiaoming Duan, Xue School of Chemical and Biomedical Engineering Engineering::Chemical engineering Layered Double Hydroxides Gradient Materials Breaking the symmetry in catalysts through interface engineering has emerged as a new dimension in enhancing the catalytic performances, while the long-range asymmetry (i.e. in nanometer scale) in catalysts can hardly be achieved by alloying or doping. Herein, we introduce asymmetrical gradient effect into NiFe layered double hydroxide (NiFe-LDH) at nano scale via a simple nanoarray construction strategy on Ni foam substrate. The electron energy loss spectroscopy, extended X-Ray absorption fine structure and other characterizations together revealed the concentration and valence states gradients in NiFe-LDH nanoarrays. Subsequently, the gradient effect leads to distinctly optimized binding strength of active sites to oxygen evolution intermediates, better electron transfers and boosted oxygen evolution performances, which are absent in non-gradient NiFe-LDH catalysts. Such long-range gradient effects in nanoarray materials provide new opportunities to understand their boosted catalytic performances and to rationally design better catalytic materials. Ministry of Education (MOE) Nanyang Technological University This work was financially supported by the National Natural Science Foundation of China , the Program for Changjiang Scholars and Innovative Research Team in the University , the Fundamental Research Funds for the Central Universities , the Long-Term Subsidy Mechanism from the Ministry of Finance and the Ministry of Education of China , the National Key Research and Development Project , the Singapore Ministry of Education Academic Research Fund (AcRF) Tier 1: RG10/16, RG9/17, RG115/17; Tier 2: MOE2016-T2-2-004, and the Nanyang Technological University internal funding. 2021-07-21T10:55:06Z 2021-07-21T10:55:06Z 2019 Journal Article Zhou, D., Jia, Y., Duan, X., Tang, J., Xu, J., Liu, D., Xiong, X., Zhang, J., Luo, J., Zheng, L., Liu, B., Kuang, Y., Sun, X. & Duan, X. (2019). Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution. Nano Energy, 60, 661-666. https://dx.doi.org/10.1016/j.nanoen.2019.04.014 2211-2855 https://hdl.handle.net/10356/151707 10.1016/j.nanoen.2019.04.014 2-s2.0-85064006211 60 661 666 en RG10/16 RG9/17 RG115/17 MOE2016-T2-2-004 Nano Energy © 2019 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Chemical engineering Layered Double Hydroxides Gradient Materials Zhou, Daojin Jia, Yin Duan, Xinxuan Tang, Jialun Xu, Jie Liu, Dong Xiong, Xuya Zhang, Junming Luo, Jun Zheng, Lirong Liu, Bin Kuang, Yun Sun, Xiaoming Duan, Xue Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title | Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title_full | Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title_fullStr | Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title_full_unstemmed | Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title_short | Breaking the symmetry : gradient in NiFe layered double hydroxide nanoarrays for efficient oxygen evolution |
| title_sort | breaking the symmetry gradient in nife layered double hydroxide nanoarrays for efficient oxygen evolution |
| topic | Engineering::Chemical engineering Layered Double Hydroxides Gradient Materials |
| url | https://hdl.handle.net/10356/151707 |
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