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In-depth understandings of charge carrier transfer dynamics in any artificial catalytic system are of critical importance for the future design of highly efficient photocatalysts. Herein, we synthesized sub-monolayer ZnSe partial-shell coated CdSe/CdS core/shell quantum dots in a controlled fashion. The ZnSe decorated quantum dots were employed as a model catalyst for photogeneration of H2 under light illumination. Both theoretical calculations and experimental results unravel that the growth of ZnSe partial-shell would retard the photogenerated electron transfer, and meanwhile, accelerate the corresponding hole migration process during the H2 photogeneration reaction in the artificial photocatalytic system. As such, the performance of the relevant photocatalytic system can be modulated and optimized, and accordingly, a plausible underlying mechanism is rationalized.

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Publication history

Received: 27 July 2022
Revised: 12 September 2022
Accepted: 14 September 2022
Published: 24 October 2022
Issue date: February 2023

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© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

P. W. acknowledges the financial support from the China Scholarship Council (CSC) and the startup funding of Jilin Normal University (No. 2021036). X. T. Y. acknowledges the funding of Changbai Mountain industrial project R&D leading team, Jilin Provincial Department of Science and Technology, China. O. C. acknowledges the support from the Electron Microscopy Facility and NanoTools Facility at Brown University.

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Email: nanores@tup.tsinghua.edu.cn

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