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Xi Q, Xie F, Liu J, Zhang X, Wang J, Wang Y, Wang Y, Li H, Yu Z, Sun Z, Jian X, Gao X, Ren J, Fan C, Li R. In Situ Formation ZnIn 2 S 4 /Mo 2 TiC 2 Schottky Junction for Accelerating Photocatalytic Hydrogen Evolution Kinetics: Manipulation of Local Coordination and Electronic Structure. Small 2023; 19:e2300717. [PMID: 36919813 DOI: 10.1002/smll.202300717] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 02/18/2023] [Indexed: 06/15/2023]
Abstract
Regulating electronic structures of the active site by manipulating the local coordination is one of the advantageous means to improve photocatalytic hydrogen evolution (PHE) kinetics. Herein, the ZnIn2 S4 /Mo2 TiC2 Schottky junctions are designed to be constructed through the interfacial local coordination of In3+ with the electronegative O terminal group on Mo2 TiC2 based on the different work functions. Kelvin probe force microscopy and charge density difference reveal that an electronic unidirectional transport channel across the Schottky interface from ZnIn2 S4 to Mo2 TiC2 is established by the formed local nucleophilic/electrophilic region. The increased local electron density of Mo2 TiC2 inhibits the backflow of electrons, boosts the charge transfer and separation, and optimizes the hydrogen adsorption energy. Therefore, the ZnIn2 S4 /Mo2 TiC2 photocatalyst exhibits a superior PHE rate of 3.12 mmol g-1 h-1 under visible light, reaching 3.03 times that of the pristine ZnIn2 S4 . This work provides some insights and inspiration for preparing MXene-based Schottky catalysts to accelerate PHE kinetics.
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Affiliation(s)
- Qing Xi
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Fangxia Xie
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Jianxin Liu
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Xiaochao Zhang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Jiancheng Wang
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Yawen Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Yunfang Wang
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Houfen Li
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Zhuobin Yu
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Zijun Sun
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Xuan Jian
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an, 716000, P. R. China
| | - Xiaoming Gao
- College of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an, 716000, P. R. China
| | - Jun Ren
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Caimei Fan
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
| | - Rui Li
- Shanxi Key Laboratory of Compound Air Pollutions Identification and Control College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
- College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, 030024, P. R. China
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