Room-temperature degradation of o-xylene in simulated air using an online-regenerable plasma-catalysis reactor with low amounts of nanosized noble metals on Co3O4

Author:

DI Shucheng,XU Jiacheng,YAO Shuiliang,LI Jing,WU Zuliang,GAO Erhao,ZHU Jiali,DAI Lianxin,LIU Weihua,ZHANG Buhe,ZHANG Junwei

Abstract

Abstract The plasma catalytic degradation of o-xylene in simulated air was improved by loading low amounts of Pt, Pd, or Au onto Co3O4. At room temperature, o-xylene conversion and CO x selectivity using a 0.1 wt% Pt/Co3O4 catalyst reached 98.9% and 80%, and the energy efficiency was at the top level in comparison with values in the literature. A stable o-xylene degradation performance could be obtained by online regenerating the heat-insulated reactor with a high energy density. After characterization, it was found that the loading of nanosized Pt not only increased the Co3+/Co2+ ratio, where the Co3+ benefitted the formation of reactive oxygen species, but also conduced Pt0 to oxygen activation, resulting in effective promotion of complete o-xylene oxidation. Operando plasma diffuse reflectance infrared Fourier transform spectroscopy demonstrated the complete o-xylene oxidation and proved that Pt played a key role in the complete oxidation of o-xylene.

Funder

National Natural Science Foundation of China

Research and Application Service Platform Project of API Manufacturing Environmental Protection and Safety Technology in China

Publisher

IOP Publishing

Subject

Condensed Matter Physics

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