Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction
Efficient and earth abundant electrocatalysts for high-performance oxygen evolution reaction (OER) are essential for the development of sustainable energy conversion technologies. Here, a new hierarchical Ni–Co oxide nanostructure, composed of small secondary nanosheets grown on primary nanosheet ar...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2015
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| Online Access: | https://hdl.handle.net/10356/106831 http://hdl.handle.net/10220/25217 http://dx.doi.org/10.1002/aenm.201500091 |
| _version_ | 1811682965320630272 |
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| author | Wang, Hsin-Yi Hsu, Ying-Ya Chen, Rong Chan, Ting-Shan Chen, Hao Ming Liu, Bin |
| author2 | School of Chemical and Biomedical Engineering |
| author_facet | School of Chemical and Biomedical Engineering Wang, Hsin-Yi Hsu, Ying-Ya Chen, Rong Chan, Ting-Shan Chen, Hao Ming Liu, Bin |
| author_sort | Wang, Hsin-Yi |
| collection | NTU |
| description | Efficient and earth abundant electrocatalysts for high-performance oxygen evolution reaction (OER) are essential for the development of sustainable energy conversion technologies. Here, a new hierarchical Ni–Co oxide nanostructure, composed of small secondary nanosheets grown on primary nanosheet arrays, is synthesized via a topotactic transformation of Ni–Co layered double hydroxide. The Ni3+-rich surface benefits the formation of NiOOH, which is the main redox site as revealed via in situ X-ray absorption near edge structure and extended X-ray absorption fine structure spectroscopy. The Ni–Co oxide hierarchical nanosheets (NCO–HNSs) deliver a stable current density of 10 mA cm−2 at an overpotential of ≈0.34 V for OER with a Tafel slope of as low as 51 mV dec−1 in alkaline media. The improvement in the OER activity can be ascribed to the synergy of large surface area offered by the 3D hierarchical nanostructure and the facile formation of NiOOH as the main active sites on the surface of NCO–HNSs to decrease the overpotential and facilitate the catalytic reaction. |
| first_indexed | 2024-10-01T04:05:13Z |
| format | Journal Article |
| id | ntu-10356/106831 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:05:13Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/1068312019-12-06T22:19:15Z Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction Wang, Hsin-Yi Hsu, Ying-Ya Chen, Rong Chan, Ting-Shan Chen, Hao Ming Liu, Bin School of Chemical and Biomedical Engineering DRNTU::Science::Chemistry::Organic chemistry::Oxidation Efficient and earth abundant electrocatalysts for high-performance oxygen evolution reaction (OER) are essential for the development of sustainable energy conversion technologies. Here, a new hierarchical Ni–Co oxide nanostructure, composed of small secondary nanosheets grown on primary nanosheet arrays, is synthesized via a topotactic transformation of Ni–Co layered double hydroxide. The Ni3+-rich surface benefits the formation of NiOOH, which is the main redox site as revealed via in situ X-ray absorption near edge structure and extended X-ray absorption fine structure spectroscopy. The Ni–Co oxide hierarchical nanosheets (NCO–HNSs) deliver a stable current density of 10 mA cm−2 at an overpotential of ≈0.34 V for OER with a Tafel slope of as low as 51 mV dec−1 in alkaline media. The improvement in the OER activity can be ascribed to the synergy of large surface area offered by the 3D hierarchical nanostructure and the facile formation of NiOOH as the main active sites on the surface of NCO–HNSs to decrease the overpotential and facilitate the catalytic reaction. 2015-03-10T03:19:50Z 2019-12-06T22:19:15Z 2015-03-10T03:19:50Z 2019-12-06T22:19:15Z 2015 2015 Journal Article Wang, H.-Y., Hsu, Y. Y., Chen, R., Chan, T.-S., Chen, H. M., & Liu, B. (2015). Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction. Advanced energy materials, 5(10), 1500091-. 1614-6832 https://hdl.handle.net/10356/106831 http://hdl.handle.net/10220/25217 http://dx.doi.org/10.1002/aenm.201500091 en © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | DRNTU::Science::Chemistry::Organic chemistry::Oxidation Wang, Hsin-Yi Hsu, Ying-Ya Chen, Rong Chan, Ting-Shan Chen, Hao Ming Liu, Bin Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title | Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title_full | Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title_fullStr | Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title_full_unstemmed | Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title_short | Ni3+-induced formation of active NiOOH on the spinel Ni-Co oxide surface for efficient oxygen evolution reaction |
| title_sort | ni3 induced formation of active niooh on the spinel ni co oxide surface for efficient oxygen evolution reaction |
| topic | DRNTU::Science::Chemistry::Organic chemistry::Oxidation |
| url | https://hdl.handle.net/10356/106831 http://hdl.handle.net/10220/25217 http://dx.doi.org/10.1002/aenm.201500091 |
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