Efficient Photocatalytic Hydrogen Production on Defective and Strained Black Bismuth (III) Oxide
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910722434269184 |
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| author | Nguyen, Thanh Tam Edalati, Kaveh |
| author_facet | Nguyen, Thanh Tam Edalati, Kaveh |
| contents | Bismuth (III) oxide (Bi2O3) has been highly studied as a photocatalyst for green hydrogen production due to its low band gap, yet its efficiency requires enhancement. This study synthesizes a defective and strained black Bi2O3 by severe straining under high pressure, via a high-pressure torsion method, to improve its photocatalytic hydrogen production. The material rich in oxygen vacancies exhibits a ten-fold improvement in water splitting with excellent cycling stability. Such improvement is due to improved light absorption, narrowing band gap and reduced irradiative electron-hole recombination. Moreover, the valence band bottom energy positively increases by straining leading to a high overpotential for hydrogen production. This research highlights the potential of vacancies and lattice strain in developing dopant-free active catalysts for water splitting. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_00499 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient Photocatalytic Hydrogen Production on Defective and Strained Black Bismuth (III) Oxide Nguyen, Thanh Tam Edalati, Kaveh Materials Science Bismuth (III) oxide (Bi2O3) has been highly studied as a photocatalyst for green hydrogen production due to its low band gap, yet its efficiency requires enhancement. This study synthesizes a defective and strained black Bi2O3 by severe straining under high pressure, via a high-pressure torsion method, to improve its photocatalytic hydrogen production. The material rich in oxygen vacancies exhibits a ten-fold improvement in water splitting with excellent cycling stability. Such improvement is due to improved light absorption, narrowing band gap and reduced irradiative electron-hole recombination. Moreover, the valence band bottom energy positively increases by straining leading to a high overpotential for hydrogen production. This research highlights the potential of vacancies and lattice strain in developing dopant-free active catalysts for water splitting. |
| title | Efficient Photocatalytic Hydrogen Production on Defective and Strained Black Bismuth (III) Oxide |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.00499 |