JECHEM-D-21-00021-accepted manuscript.pdf (1.95 MB)
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S vacancy modulated ZnxCd1−xS/CoP quantum dots for efficient H2 evolution from water splitting under visible light

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journal contribution
posted on 15.04.2021, 14:47 by Qi Xie, Min Wang, Yong Xu, Xiaoke Li, Xin Zhou, Liang Hong, Luhua Jiang, Wen-Feng LinWen-Feng Lin
Energy band structure and interfacial compatibility of heterojunctions are crucial for photocatalysts in promoting photogenerated charge separation and transfer. Here, a combined strategy of vacancy engineering and quantum effect via a facile phosphating process is reported, for the first time, to modulate the energy band structure and the interface of ZnxCd1-xS/CoP quantum dots (ZCSv/CoP QDs) heterojunction. The combined experimental and theoretical investigation revealed that phosphating process transformed CoOx QDs to CoP QDs, and more importantly, generated considerable amount of sulfur vacancies in ZCSv. As a result, a Type II ZCSv/CoP QDs heterojunction with compatible interfaces was constructed via in-situ generated P-Zn, P-Cd and S-Co bonds, which facilitated the separation and transfer of the photogenerated charge and thus resulted in a high ability towards hydrogen evolution under visible light. This work provides an effective and adaptable strategy to modulate band structure and interfacial compatibility of heterojunctions via vacancy engineering and quantum effect

Funding

Taishan Scholar Program of Shandong Province (ts201712046)

Key Research and Development Programme of Shandong Province (2019JZZY010905)

Natural Science Foundation of Shandong Province (ZR2020QB132)

Liaoning BaiQianWan Talents Program, and the Royal Society and the Newton Fund (NAF\R1\191294)

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Chemical Engineering

Published in

Journal of Energy Chemistry

Volume

61

Pages

210 - 218

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Rights holder

© 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

Publisher statement

This paper was accepted for publication in the journal Journal of Energy Chemistry and the definitive published version is available at https://doi.org/10.1016/j.jechem.2021.03.019

Acceptance date

16/03/2021

Publication date

2021-04-08

Copyright date

2021

ISSN

2095-4956

Language

en

Depositor

Prof Wen Feng Lin. Deposit date: 12 April 2021