Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (3): 470-475.DOI: 10.1016/S1872-2067(19)63274-2

• Articles • Previous Articles    

Simultaneous hydrogen and peroxide production by photocatalytic water splitting

Lichao Wanga,b, Shuang Caoa, Kai Guoa, Zhijiao Wua, Zhi Mab, Lingyu Piaoa   

  1. 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:2018-11-05 Revised:2018-12-07 Online:2019-03-18 Published:2019-02-22
  • Supported by:

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

Abstract:

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.

Key words: Photocatalytic water splitting, Hydrogen, Hydrogen peroxide, Anatase TiO2