Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (s1): 227-234.

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Recent Progress on Photoelectrochemical Water Splitting Based on Molecular Water Oxidation Catalysts

ZHU Yong1, LI Fei1, SUN Licheng1,2   

  1. 1 State-Key Laboratory of Fine Chemical Industry, Dalian University of Technology, Dalian 116024, Liaoning, China;
    2 Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm 10044
  • Online:2019-12-17 Published:2019-10-10
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (21872016).

Abstract: Solar water splitting into hydrogen and oxygen has been considered as a promising method for production of solar fuel. A key challenge in overall water splitting is the catalytic water oxidation. And the emergence of molecular water oxidation catalysts (WOCs) has provided an opportunity to mimic the function of the oxygen-evolving complex (OEC) of photosystem Ⅱ in nature and an alternative way for artificial photosynthesis. Despite progress made on molecular approaches to solar energy conversion, construction of molecularly-based artificial photosynthetic devices that enable simultaneous oxygen and hydrogen evolution remains a significant challenge. This paper reviews recent progress in electrochemical and photoelectrochemical water splitting based on molecular WOCs. Strategies and principles for hybrid anodes and photoanodes design were summarized. And these results show great promise for improving the efficiency of artificial photosynthesis by taking advantage of molecular engineering.

Key words: artificial photosynthesis, water splitting, molecular water oxidation catalyst, nelectrocatalysis, photoanode, dye-sensitized