Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction
© 2017 American Chemical Society. Few-layered tungsten disulfide (WS 2 ) with a controlled-phase ratio (the highest trigonal-phase ratio being 67%) was exfoliated via lithium insertion. The exfoliated WS 2 nanosheets were then anchored onto three-dimensional (3D) graphite foam (GF) to fabricate free...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/57823 |
| _version_ | 1848760107593105408 |
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| author | Guo, X. Ji, J. Jiang, Q. Zhang, L. Ao, Z. Fan, X. Wang, Shaobin Li, Y. Zhang, F. Zhang, G. Peng, W. |
| author_facet | Guo, X. Ji, J. Jiang, Q. Zhang, L. Ao, Z. Fan, X. Wang, Shaobin Li, Y. Zhang, F. Zhang, G. Peng, W. |
| author_sort | Guo, X. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 American Chemical Society. Few-layered tungsten disulfide (WS 2 ) with a controlled-phase ratio (the highest trigonal-phase ratio being 67%) was exfoliated via lithium insertion. The exfoliated WS 2 nanosheets were then anchored onto three-dimensional (3D) graphite foam (GF) to fabricate free-standing binder-free electrodes. The 3D GF can increase the interfacial contact between the WS 2 nanosheets and the electrolyte and facilitate ion transfer. Without the nonconductive binder, an intimate contact between the WS 2 and GF interface can be created, leading to the improvement of electrical conductivity. In comparison to the pure WS 2 nanosheets, the overpotential for a hydrogen evolution reaction is significantly decreased from 350 mV to 190 mV at 10 mA/cm 2 , and no deactivation occurs after 1000 cycles. The density functional theory computations reveal that the efficient catalytic activity of the trigonal-phase WS 2 /GF electrode is attributed to the lower Gibbs free energy for H* adsorption and higher electrical conductivity. |
| first_indexed | 2025-11-14T10:10:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-57823 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:10:31Z |
| publishDate | 2017 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-578232023-08-02T06:39:10Z Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction Guo, X. Ji, J. Jiang, Q. Zhang, L. Ao, Z. Fan, X. Wang, Shaobin Li, Y. Zhang, F. Zhang, G. Peng, W. © 2017 American Chemical Society. Few-layered tungsten disulfide (WS 2 ) with a controlled-phase ratio (the highest trigonal-phase ratio being 67%) was exfoliated via lithium insertion. The exfoliated WS 2 nanosheets were then anchored onto three-dimensional (3D) graphite foam (GF) to fabricate free-standing binder-free electrodes. The 3D GF can increase the interfacial contact between the WS 2 nanosheets and the electrolyte and facilitate ion transfer. Without the nonconductive binder, an intimate contact between the WS 2 and GF interface can be created, leading to the improvement of electrical conductivity. In comparison to the pure WS 2 nanosheets, the overpotential for a hydrogen evolution reaction is significantly decreased from 350 mV to 190 mV at 10 mA/cm 2 , and no deactivation occurs after 1000 cycles. The density functional theory computations reveal that the efficient catalytic activity of the trigonal-phase WS 2 /GF electrode is attributed to the lower Gibbs free energy for H* adsorption and higher electrical conductivity. 2017 Journal Article http://hdl.handle.net/20.500.11937/57823 10.1021/acsami.7b06613 American Chemical Society restricted |
| spellingShingle | Guo, X. Ji, J. Jiang, Q. Zhang, L. Ao, Z. Fan, X. Wang, Shaobin Li, Y. Zhang, F. Zhang, G. Peng, W. Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title | Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title_full | Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title_fullStr | Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title_full_unstemmed | Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title_short | Few-Layered Trigonal WS2Nanosheet-Coated Graphite Foam as an Efficient Free-Standing Electrode for a Hydrogen Evolution Reaction |
| title_sort | few-layered trigonal ws2nanosheet-coated graphite foam as an efficient free-standing electrode for a hydrogen evolution reaction |
| url | http://hdl.handle.net/20.500.11937/57823 |