Cited by 86Advanced Photocatalysis TechniquesTiO2 Photocatalysis and Solar CellsElectrocatalysts for Energy Conversion

In‐Situ Anchoring of Co Single‐Atom Synergistically with Cd Vacancy of Cadmium Sulfide for Boosting Asymmetric Charge Distribution and Photocatalytic Hydrogen Evolution

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Yang, Kaihua, Huang, Yicai, Wang, Tantan, Li, Yiming, Du, Yating, Ling, Juan, Fan, Ziyi, Zhang, Chang, Ma, Chi·2024·Advanced Materials

Abstract

In the context of reshaping the energy pattern, designing and synthesizing high‐performance noble metal‐free photocatalysts with ultra‐high atomic utilization for hydrogen evolution reaction (HER) still remains a challenge. In a streamlined synthesis process, in‐situ single atom anchoring is performed in parallel with HER by irradiating a precursory defect‐state CdS/Co suspension (Co‐DCdS‐Ss) system under simulated sunlight and the in‐situ synthesizing single‐atom Co photocatalyst (Co5:DCdS) exhibits further improved catalytic performance (60.10 mmol g −1 h −1 ) compared with Co‐DCdS‐Ss (18.09 mmol g −1 h −1 ), reaching an apparent quantum yield of 57.6% at 500 nm and a solar‐chemical energy conversion efficiency (SCC) of 6.26% at AM 1.5G. In‐depth characterization tests and density functional theory (DFT) calculations prove that the anchoring of Co single atom deepens the asymmetric charge distribution of the two‐coordination S atom adjacent to the cadmium vacancy (V Cd ). The synergy between electron delocalization V Cd and Co single atom on the catalyst surface is constructed, which bifunctional sites responsible for boosting water adsorption‐dissociation and hydrogen evolution. This study advances the understanding of the underlying mechanisms of synergy between surface defects and metal single atoms and opens a new horizon for the development of advanced materials in the field of photocatalysis.

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  1. 10.1002/adma.202300902 · DOI

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Authors
Yang, K., Huang, Y., Wang, T., Li, Y., Du, Y., Ling, J., Fan, Z., Zhang, C., & Ma, C.
Affiliations
Hunan University (CN)
Corresponding author
  • Zhang, Chang
  • Ma, Chi
Venue
Advanced Materials
Publisher
Wiley
Published
2024-10-10
Volume
36
Issue
48
Pages
e2409832-e2409832
ISSN
  • 0935-9648 (ISSN-L)
  • 1521-4095
OpenAlex
W4403294992
Cited by
86
References
57
Citations by year
2026: 45 · 2025: 41
FWCI
5.72
Type
journal article
Language
en
Open access
Locations
  • Advanced Materials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Basic Research Program of China (2023YFF0724403)
  • National Natural Science Foundation of China (42407122)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
cobalt single-atom catalysts, cadmium vacancies, cadmium sulfide, photocatalytic hydrogen evolution, asymmetric charge distribution, surface defects, noble-metal-free photocatalyst, water adsorption and dissociation

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