Journal
CATALYSIS COMMUNICATIONS
Volume 134, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2019.105860
Keywords
Photocatalysis; Au/ZnO; Oxygen reduction; Hydrogen peroxide
Categories
Funding
- National Natural Science Foundation of China [51872091, 51502075, 21703065, 51602153]
- Hundred Talents Program of Hebei Province [E2018050013]
- Natural Science Foundation of Hebei Province [82018209267]
- Outstanding Youth Funds of North China University of Science and Technology [JP201604, JQ201706]
- Hong Kong Scholars Program
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In this study, Au-nanoparticle-supported crystalline ZnO (Au/ZnO) is found to be a simple and efficient photocatalyst for direct H2O2 synthesis in an aerated aqueous solution. Compared with widely studied Au-nanoparticle-supported anatase TiO2 photocatalyst, Au/ZnO shows almost one order of magnitude higher activity in H2O2 production. The site-specific deposition of smaller Au nanococatalyst on ZnO delivers best photocatalytic performance and the H2O2 production is relatively stable with a rate more than 1.5 mmol L-1 h(-1). The electron spin resonance studies reveal that the H2O2 is produced through direct 2e(-) oxygen reduction over the optimized Au/ZnO photocatalyst.
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