Applied Catalysis2022，Vol.3038.DOI:10.1016/j.apcatb.2021.120887

Engineering interfacial charge transfer channel for efficient photocatalytic H-2 evolution: The interplay of CoPx and Ca2+ dopant

Yang, Gaoliang Deng, Bowen Huang, Zongyu Wang, Xu-Sheng Shi, Li Ye, Jinhua Ren, Xiaohui Liu, Fei Wang, Qi Song, Hui Luo, Shunqin Li, Sijie
Applied Catalysis2022，Vol.3038.DOI:10.1016/j.apcatb.2021.120887
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  • NSTL
  • Elsevier

Engineering interfacial charge transfer channel for efficient photocatalytic H-2 evolution: The interplay of CoPx and Ca2+ dopant

Yang, Gaoliang 1Deng, Bowen 1Huang, Zongyu 2Wang, Xu-Sheng 3Shi, Li 4Ye, Jinhua 1Ren, Xiaohui 1Liu, Fei 2Wang, Qi 1Song, Hui 3Luo, Shunqin 1Li, Sijie1
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作者信息

  • 1. Hokkaido Univ
  • 2. Xiangtan Univ
  • 3. Natl Inst Mat Sci NIMS
  • 4. Ningbo Univ
  • 折叠

Abstract

Cobalt phosphide (CoPx) has been developed as a cost-effective cocatalyst for photocatalytic H-2 evolution with the advantages of excellent conductivity, strong reduction ability, good thermal and chemical stability. In this work, a facile preparation strategy was proposed to fabricate ultrafine CoPx nanoparticles on the surface of CdS. The effective H-2 production over ultrafine CoPx nanoparticles has been realized. In addition, we found Ca2+ as an alkaline earth metal ion can promote the interaction between CdS and CoPx. Both experimental results and density function theory indicate that the Ca2+ dopant can act as surface trapping sites on CdS and lead to efficient separation of photogenerated electron-hole pairs. The integration of CoPx and Ca2+ dopant can synergistically enhance both photogenerated electron-hole separation as well as interfacial charge transfer, which enables a remarkable improvement on the H-2 generation performance of CdS. The photocatalytic H-2 generation rate of Ca modified CoPx@CdS can reach up to 2441.5 mu mol h(-1) under optimal conditions with the apparent quantum efficiency as high as 35.4% at 420 nm. This finding motivates the development of simplified fabrication procedures for constructing and modifying cobalt active sites with efficient photocatalytic H-2 generation performance.

Key words

CdS/Interfacial engineering/Ultrafine CoPx nanoparticles/Photocatalytic H-2 generation/HYDROGEN EVOLUTION/CARBON NITRIDE/SEMICONDUCTOR NANORODS/METAL PHOSPHIDES/ACTIVE-SITES/NANOPARTICLES/WATER/ENERGY/OXYGEN/ELECTROCATALYST

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量22
参考文献量59
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