1. Reversing free-electron transfer of sulfide cocatalyst for exceptional photocatalytic H2 evolution.
- Author
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Zhang, Yanfeng and Zhang, Zhenyi
- Subjects
X-ray photoelectron spectroscopy ,CHARGE exchange ,CHARGE transfer ,HYDROGEN evolution reactions ,FREE electron lasers ,PHOTOINDUCED electron transfer ,SULFIDES - Abstract
• An electron-reversal strategy was proposed to weaken S H ads bonds. • The essence of electron reversal and optimized H adsorption was revealed. • The charge transfer mechanism was characterized by fs-TA and in situ XPS. Recently, Yu and co-workers deeply explore the potential impact of free electron transfer between cocatalysts and photocatalyst carriers on H 2 evolution efficiency of active sites over MoS 2+ x. They propose an electron-reversal tactics to evade the unexpected electron transfer and synchronously regulate the above transfer in a beneficial orientation for weakening hydrogen adsorption on S sites. Herein, this highlight not only discusses and summarizes the essences of electron reversal and the optimized H adsorption/desorption mechanism, but also emphasizes the significance of femtosecond transient absorption spectroscopy (fs-TAS) and in-situ irradiated X-ray photoelectron spectroscopy (ISI-XPS) for revealing charge transfer dynamics and processes. We anticipate that this highlight can disseminate a new perspective on the roles of photocatalyst carriers in improving cocatalytic H 2 -production kinetics. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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