Ultrathin Assembles of Porous Array for Enhanced H2 Evolution
Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The c...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
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NATURE PUBLISHING GROUP
2020
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/88604 |
| _version_ | 1848765051114094592 |
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| author | Islam, A. Hwa Teo, S. Awual, Rabiul Taufiq-Yap, Y.H. |
| author_facet | Islam, A. Hwa Teo, S. Awual, Rabiul Taufiq-Yap, Y.H. |
| author_sort | Islam, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The catalyst was produced by means of simple one-pot solid reaction using self-designed metal reactor. The physiochemical properties of photocatalyst were identified by XRD, FESEM, HRTEM, EDX, UV-visible, XPS, GC and PL. The photocatalytic activities of Ni-Si/MgO photocatalyst at different nickel concentrations were evaluated without adjusting pH, applied voltage, sacrificial agent or electron donor. The ultrathin-nanosheet with hierarchically porous structure of catalyst was found to exhibit higher photocatalytic H2 production than hexagonal nanorods structured catalyst, which suggests that the randomly branched nanosheets are more active surface to increase the light-harvesting efficiency due to its short electron diffusion path. The catalyst exhibited remarkable performance reaching up to 714 µmolh−1 which is higher among the predominant semiconductor catalyst. The results demonstrated that the photocatalytic reaction irradiated under visible light illumination through the production of hydrogen and hydroxyl radicals on metals. The outcome indicates an important step forward one-pot facile approach to prepare noble ultrathin photocatalyst for hydrogen production from water. |
| first_indexed | 2025-11-14T11:29:06Z |
| format | Journal Article |
| id | curtin-20.500.11937-88604 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:29:06Z |
| publishDate | 2020 |
| publisher | NATURE PUBLISHING GROUP |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-886042022-06-14T07:56:24Z Ultrathin Assembles of Porous Array for Enhanced H2 Evolution Islam, A. Hwa Teo, S. Awual, Rabiul Taufiq-Yap, Y.H. Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics CARBON NITRIDE NANOSHEETS HYDROGEN EVOLUTION WATER SILICON PHOTOCATALYST EFFICIENT LIGHT XPS HETEROSTRUCTURE NANOPARTICLES Since the complexity of photocatalyst synthesis process and high cost of noble cocatalyst leftovers a major hurdle to producing hydrogen (H2) from water, a noble metal-free Ni-Si/MgO photocatalyst was realized for the first time to generate H2 effectively under illumination with visible light. The catalyst was produced by means of simple one-pot solid reaction using self-designed metal reactor. The physiochemical properties of photocatalyst were identified by XRD, FESEM, HRTEM, EDX, UV-visible, XPS, GC and PL. The photocatalytic activities of Ni-Si/MgO photocatalyst at different nickel concentrations were evaluated without adjusting pH, applied voltage, sacrificial agent or electron donor. The ultrathin-nanosheet with hierarchically porous structure of catalyst was found to exhibit higher photocatalytic H2 production than hexagonal nanorods structured catalyst, which suggests that the randomly branched nanosheets are more active surface to increase the light-harvesting efficiency due to its short electron diffusion path. The catalyst exhibited remarkable performance reaching up to 714 µmolh−1 which is higher among the predominant semiconductor catalyst. The results demonstrated that the photocatalytic reaction irradiated under visible light illumination through the production of hydrogen and hydroxyl radicals on metals. The outcome indicates an important step forward one-pot facile approach to prepare noble ultrathin photocatalyst for hydrogen production from water. 2020 Journal Article http://hdl.handle.net/20.500.11937/88604 10.1038/s41598-020-59325-4 English http://creativecommons.org/licenses/by/4.0/ NATURE PUBLISHING GROUP fulltext |
| spellingShingle | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics CARBON NITRIDE NANOSHEETS HYDROGEN EVOLUTION WATER SILICON PHOTOCATALYST EFFICIENT LIGHT XPS HETEROSTRUCTURE NANOPARTICLES Islam, A. Hwa Teo, S. Awual, Rabiul Taufiq-Yap, Y.H. Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title | Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title_full | Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title_fullStr | Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title_full_unstemmed | Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title_short | Ultrathin Assembles of Porous Array for Enhanced H2 Evolution |
| title_sort | ultrathin assembles of porous array for enhanced h2 evolution |
| topic | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics CARBON NITRIDE NANOSHEETS HYDROGEN EVOLUTION WATER SILICON PHOTOCATALYST EFFICIENT LIGHT XPS HETEROSTRUCTURE NANOPARTICLES |
| url | http://hdl.handle.net/20.500.11937/88604 |