Citation: Yushuai Jia, Dan Zhao, Mingrun Li, Hongxian Han, Can Li. La and Cr Co-doped SrTiO₃ as an H₂ evolution photocatalyst for construction of a Z-scheme overall water splitting system[J]. Chinese Journal of Catalysis, ;2018, 39(3): 421-430. doi: 10.1016/S1872-2067(18)63027-X shu

La and Cr Co-doped SrTiO₃ as an H₂ evolution photocatalyst for construction of a Z-scheme overall water splitting system

Yushuai Jia ^a,b, ,
Dan Zhao ^a ,
Mingrun Li ^a ,
Hongxian Han ^a ,
Can Li ^a

a State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
b College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, Jiangxi, China

Received Date: 23 December 2017
Revised Date: 19 January 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21763013, 21473189), and the National Key Research and Development Program of China (2017YFA0204804).

The photocatalytic activity of a semiconductor-based photocatalyst largely depends on the semiconductor's intrinsic crystal and electronic properties. We have prepared two types of La and Cr co-doped SrTiO₃ photocatalysts (SrTiO₃(La,Cr)) using the polymerized complex method (PCM) and sol-gel hydrothermal method (SHM). Under λ > 420-nm visible light irradiation, only the Pt-loaded SrTiO₃(La,Cr) prepared by the SHM showed efficient photocatalytic activities for both H₂ evolution in the presence of an I^- sacrificial reagent and for Z-scheme overall water splitting when it was coupled with the Pt-loaded WO₃in the presence of I^- and IO₃^- as the shuttle redox mediator. The superior photocatalytic activity of SrTiO₃(La,Cr) prepared by the SHM has been ascribed to its more negative conduction-band position, higher carrier concentration, and higher carrier mobility, demonstrating that the design and synthesis of an H₂-evolution photocatalyst with appropriate electronic properties is crucial for achieving Z-scheme overall water splitting.
- Strontium titanate,
- Photocatalysis,
- Water splitting,
- Z-scheme,
- Hydrogen evolution
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La and Cr Co-doped SrTiO₃ as an H₂ evolution photocatalyst for construction of a Z-scheme overall water splitting system