Citation: Lichao Wang, Shuang Cao, Kai Guo, Zhijiao Wu, Zhi Ma, Lingyu Piao. Simultaneous hydrogen and peroxide production by photocatalytic water splitting[J]. Chinese Journal of Catalysis, ;2019, 40(3): 470-475. doi: S1872-2067(19)63274-2 shu

Simultaneous hydrogen and peroxide production by photocatalytic water splitting

Lichao Wang ^a,b, ,
Shuang Cao ^a ,
Kai Guo ^a ,
Zhijiao Wu ^a ,
Zhi Ma ^b ,
Lingyu Piao ^a

a CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, CAS Key Laboratory of Standardization and Measurement for Nanotechnology, Beijing 100190, China;
b School of chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Received Date: 5 November 2018
Revised Date: 7 December 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21703046) and the National Key R&D of China (2016YFF0203803 and 2016YFA0200902).

Photocatalytic oxidation of water is a promising method to realize large-scale H₂O₂ production without a hazardous and energy-intensive process. In this study, we introduce a Pt/TiO₂(anatase) photocatalyst to construct a simple and environmentally friendly system to achieve simultaneous H₂ and H₂O₂ production. Both H₂ and H₂O₂ are high-value chemicals, and their separation is automatic. Even without the assistance of a sacrificial agent, the system can reach an efficiency of 7410 and 5096 μmol g^-1 h^-1 (first 1 h) for H₂ and H₂O₂, respectively, which is much higher than that of a commercial Pt/TiO₂(anatase) system that has a similar morphology. This exceptional activity is attributed to the more favorable two-electron oxidation of water to H₂O₂, compared with the four-electron oxidation of water to O₂.
- Photocatalytic water splitting,
- Hydrogen,
- Hydrogen peroxide,
- Anatase TiO₂
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