Chinese Journal of Catalysis ›› 2026, Vol. 91: 68-92.DOI: 10.1016/S1872-2067(26)65261-8

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Atomically dispersed cocatalysts for photocatalysis: From single and dual atoms to high-entropy alloys

Ting Chen, Siyu Wu, Kangle Lv, Qin Li*()   

  1. Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education and Hubei Key Laboratory of Catalysis and Materials Science, South-Central Minzu University, Wuhan 430074, Hubei, China
  • Received:2026-05-26 Accepted:2026-06-13 Online:2026-12-18 Published:2026-10-13
  • About author:Qin Li (School of Chemistry and Materials Science, South Central Minzu University) was invited as a member of the 6th Young Editorial Board of Chin. J. Catal.. She received a Ph.D degree in Materials Science from Wuhan University of Technology in 2014, and thereafter worked in the School of Chemistry and Materials Science in South-Central Minzu University. She was co-trained as a graduate student in 2010-2011 at the National Nanoscience Center, and she carried out a CSC project in the Domen-Hisatomi lab in Shinshu University (Japan) from 2024 to 2025. Over the last 12 years, her research has focused on photocatalytic hydrogen production from water splitting over metal sulfide based composite materials. Prof. Li has published related papers with over 11610 citations with an H-index of 53. She has been ranked among the top 100,000 scientists in the world in 2022, and also listed as one of the Top 2% scientists sourced from ELSEVIER and Standford Univeristy in 2024 and 2025.
  • Supported by:
    National Natural Science Foundation of China(21972171);the Fundamental Research Funds for the Central Universities of South-Central Minzu University(CZZ25013);the Fund for Academic Innovation Teams of South-Central Minzu University(XTZ24019)

Abstract:

With increasing demands for energy conversion and environmental remediation, photocatalysis has become an important route for efficient solar-energy utilization and small-molecule conversion owing to its green and renewable characteristics. Atomically dispersed photocatalytic cocatalysts, featuring unique structures and maximized atom utilization, bridge heterogeneous and homogeneous catalysis. In recent years, this field has developed rapidly from single-atom catalysts to synergistic dual-atom sites and further to structurally complex high-entropy alloys. This review systematically summarized recent progress in atomically dispersed cocatalysts from single atoms and dual atoms to high-entropy alloys. Emphasis was placed on their synthetic methodologies, stabilization strategies, structure-performance relationships, and experimental and theoretical advances in photocatalytic water splitting, CO2 reduction, biomass conversion, and related energy and small-molecule transformations. Finally, current challenges and prospects of atomically dispersed cocatalysts are discussed.

Key words: Photocatalysis, Single atom, Dual atoms, High-entropy alloys, Catalytic application