Promoting photocatalytic hydrogen evolution by modulating the electron-transfer in an ultrafast timescale through Mo-S6 configuration
(2024) In Journal of Materials Science and Technology 193. p.73-80- Abstract
Maximizing ultrafast electron-transfer kinetics in semiconductor is pivotal but challenging for high-efficiency solar-to-energy during the photocatalytic reaction process due to the intrinsic property of photocatalysts with low surface electron density. Herein, a model photocatalyst CdS@Mo is synthesized through a typical hydrothermal method for modulating the ultrafast electron-transfer to enhance the surface electron density. X-ray absorption fine spectra (XAFS) reveal that Mo is coordinated with S atoms to form a Mo-S6 configuration which is different from common MoS2 and Mo foil structures. Based on the femtosecond transient absorption spectra (fs-TAS), it is found that the formation of Mo-S6... (More)
Maximizing ultrafast electron-transfer kinetics in semiconductor is pivotal but challenging for high-efficiency solar-to-energy during the photocatalytic reaction process due to the intrinsic property of photocatalysts with low surface electron density. Herein, a model photocatalyst CdS@Mo is synthesized through a typical hydrothermal method for modulating the ultrafast electron-transfer to enhance the surface electron density. X-ray absorption fine spectra (XAFS) reveal that Mo is coordinated with S atoms to form a Mo-S6 configuration which is different from common MoS2 and Mo foil structures. Based on the femtosecond transient absorption spectra (fs-TAS), it is found that the formation of Mo-S6 configuration contributes to the fast decay of CdS signal and Mo-S6 signal reactivation, illustrating the ultrafast electron-transfer (∼2.2 ps) from CdS to Mo-S6 configuration, which achieves the enhanced electron density of photocatalyst surface. Finally, a holistic photocatalytic performance evaluation discloses that the growing of Mo-S6 configuration obviously improves the photocatalytic hydrogen evolution (PHE) efficiency of CdS from 28.5 to 47.5 mmol g–1 h–1 with a solar-to-hydrogen (STH) efficiency of 0.10 % which is seldomly discussed in the system containing sacrificial agents. This work opens a new path to modulate the surface electron density by tuning the ultrafast electron-transfer for enhancing reaction efficiency in electron-density-dependent systems.
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- author
- Li, Yi ; Yu, Shan ; Cao, Yuehan ; Huang, Yue ; Wang, Qiaohao ; Duan, Yuangang ; Li, Lina ; Zheng, Kaibo LU and Zhou, Ying
- organization
- publishing date
- 2024-09-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- CdS, Electron-transfer, Mo-S configuration, Photocatalytic hydrogen evolution
- in
- Journal of Materials Science and Technology
- volume
- 193
- pages
- 8 pages
- publisher
- Chinese Society of Metals
- external identifiers
-
- scopus:85188026281
- ISSN
- 1005-0302
- DOI
- 10.1016/j.jmst.2024.01.021
- language
- English
- LU publication?
- yes
- id
- 0dec2026-0243-4b82-bb69-048b45c1c075
- date added to LUP
- 2024-03-27 13:41:07
- date last changed
- 2024-03-27 13:41:58
@article{0dec2026-0243-4b82-bb69-048b45c1c075, abstract = {{<p>Maximizing ultrafast electron-transfer kinetics in semiconductor is pivotal but challenging for high-efficiency solar-to-energy during the photocatalytic reaction process due to the intrinsic property of photocatalysts with low surface electron density. Herein, a model photocatalyst CdS@Mo is synthesized through a typical hydrothermal method for modulating the ultrafast electron-transfer to enhance the surface electron density. X-ray absorption fine spectra (XAFS) reveal that Mo is coordinated with S atoms to form a Mo-S<sub>6</sub> configuration which is different from common MoS<sub>2</sub> and Mo foil structures. Based on the femtosecond transient absorption spectra (fs-TAS), it is found that the formation of Mo-S<sub>6</sub> configuration contributes to the fast decay of CdS signal and Mo-S<sub>6</sub> signal reactivation, illustrating the ultrafast electron-transfer (∼2.2 ps) from CdS to Mo-S<sub>6</sub> configuration, which achieves the enhanced electron density of photocatalyst surface. Finally, a holistic photocatalytic performance evaluation discloses that the growing of Mo-S<sub>6</sub> configuration obviously improves the photocatalytic hydrogen evolution (PHE) efficiency of CdS from 28.5 to 47.5 mmol g<sup>–1</sup> h<sup>–1</sup> with a solar-to-hydrogen (STH) efficiency of 0.10 % which is seldomly discussed in the system containing sacrificial agents. This work opens a new path to modulate the surface electron density by tuning the ultrafast electron-transfer for enhancing reaction efficiency in electron-density-dependent systems.</p>}}, author = {{Li, Yi and Yu, Shan and Cao, Yuehan and Huang, Yue and Wang, Qiaohao and Duan, Yuangang and Li, Lina and Zheng, Kaibo and Zhou, Ying}}, issn = {{1005-0302}}, keywords = {{CdS; Electron-transfer; Mo-S configuration; Photocatalytic hydrogen evolution}}, language = {{eng}}, month = {{09}}, pages = {{73--80}}, publisher = {{Chinese Society of Metals}}, series = {{Journal of Materials Science and Technology}}, title = {{Promoting photocatalytic hydrogen evolution by modulating the electron-transfer in an ultrafast timescale through Mo-S<sub>6</sub> configuration}}, url = {{http://dx.doi.org/10.1016/j.jmst.2024.01.021}}, doi = {{10.1016/j.jmst.2024.01.021}}, volume = {{193}}, year = {{2024}}, }