Efficient photocatalytic hydrogen peroxide production over TiO2 passivated by SnO2

Zuo, G. et al. (2019) Efficient photocatalytic hydrogen peroxide production over TiO2 passivated by SnO2. Catalysts, 9(7), 623. (doi: 10.3390/catal9070623)

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Photocatalysis provides an attractive strategy for synthesizing H2O2 at ambient condition. However, the photocatalytic synthesis of H2O2 is still limited due to the inefficiency of photocatalysts and decomposition of H2O2 during formation. Here, we report SnO2-TiO2 heterojunction photocatalysts for synthesizing H2O2 directly in aqueous solution. The SnO2 passivation suppresses the complexation and decomposition of H2O2 on TiO2. In addition, loading of Au cocatalyst on SnO2-TiO2 heterojunction further improves the production of H2O2. The in situ electron spin resonance study revealed that the formation of H2O2 is a stepwise single electron oxygen reduction reaction (ORR) for Au and SnO2 modified TiO2 photocatalysts. We demonstrate that it is feasible to enhance H2O2 formation and suppress H2O2 decomposition by surface passivation of the H2O2-decomposition-sensitive photocatalysts.

Item Type:Articles
Additional Information:Funding: This work was supported by the National Natural Science Foundation of China (51872091, 51502075, 21703065, and 51602153), “Hundred Talents Program” of Hebei Province (E2018050013), Natural Science Foundation of Hebei Province (B2018209267), Outstanding Youth Funds of North China University of Science and Technology (JP201604 and JQ201706), and the Hong Kong Scholars Program.
Glasgow Author(s) Enlighten ID:Vellaisamy, Professor Roy
Authors: Zuo, G., Li, B., Guo, Z., Wang, L., Yang, F., Hou, W., Zhang, S., Zong, P., Liu, S., Meng, X., Du, Y., Wang, T., and Roy, V. A.L.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Catalysts
ISSN (Online):2073-4344
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Catalysts9(7):623
Publisher Policy:Reproduced under a Creative Commons Licence
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