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Citation: Linchao Mu, Qiao Zhang, Xiaoping Tao, Yue Zhao, Shengyang Wang, Junyan Cui, Fengtao Fan, Can Li. Photo-induced self-formation of dual-cocatalysts on semiconductor surface[J]. Chinese Journal of Catalysis, ;2018, 39(11): 1730-1735. doi: 10.1016/S1872-2067(18)63138-9 shu

Photo-induced self-formation of dual-cocatalysts on semiconductor surface

Linchao Mu ^a,b, ,
Qiao Zhang ^a ,
Xiaoping Tao ^a ,
Yue Zhao ^a,b ,
Shengyang Wang ^a,b ,
Junyan Cui ^a ,
Fengtao Fan ^a ,
Can Li ^a

a State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, and the Collaborative Innovation Center of Chemistry for Energy Materials(iChEM), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 28 June 2018
Revised Date: 16 July 2018

Fund Project: This work was supported by the Strategic Priority Research Program of Chinese Academy of Sciences (XDB17000000) and the National Natural Science Foundation of China (21761142018).

Cocatalyst plays key roles in photogenerated charge separation and surface catalytic reactions in photocatalysis. However, it is not clear if the chemical states of cocatalysts changed or remains unchanged under photocatalytic reaction conditions. Herein, taking NaTaO₃ as an example, we systemically investigated the chemical states of nickel-based cocatalysts during photocatalytic water splitting reaction. It was found that photo-induced self-formation of Ni and NiO cocatalyst species take place on the surface of NaTaO₃ nanocrystals. The self-formation of dual-cocatalysts not only occurs on 26-facet NaTaO₃, but also takes place on a more general 6-facet NaTaO₃. Our work clarified that the chemical states of cocatalysts are changing and the redox dual-cocatalysts are redistributed on the semiconductor surface owing to the reaction induced by photogenerated charges under the condition of photocatalytic reactions.
- Photocatalysis,
- Cocatalyst,
- Chemical state,
- Photogenerated charges,
- Self-formation
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