Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation

DI Lanbo (底兰波); ZHAN Zhibin (詹志彬); ZHANG Xiuling (张秀玲); QI Bin (亓滨); XU Weijie (徐伟杰)

doi:10.1088/1009-0630/18/5/17

Plasma Science and Technology > 2016 > 18(5): 544-548. > DOI: 10.1088/1009-0630/18/5/17

DI Lanbo (底兰波), ZHAN Zhibin (詹志彬), ZHANG Xiuling (张秀玲), QI Bin (亓滨), XU Weijie (徐伟杰). Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation[J]. Plasma Science and Technology, 2016, 18(5): 544-548. DOI: 10.1088/1009-0630/18/5/17

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Atmospheric-Pressure DBD Cold Plasma for Preparation of High Active Au/P25 Catalysts for Low-Temperature CO Oxidation

1 College of Physical Science and Technology, Dalian University, Dalian 116622, China 2 Key Laboratory for Non-traditional & Functional Materials Preparation of Education Department of Liaoning Province, Dalian University, Dalian 116622, China

Funds: supported by National Natural Science Foundation of China (Nos. 11505019, 21173028), the Science and Technology Research Project of Liaoning Provincial Education Department (No. L2013464), the Scientific Research Foundation for the Doctor of Liaoning Province (No. 20131004), and the Dalian Jinzhou New District Science and Technology Plan Project (No. KJCX-ZTPY-2014-0001)

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Received Date: September 08, 2015

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Abstract

Abstract

Cold plasma generated by dielectric barrier discharge (DBD) at atmospheric pressure was adopted for preparation of commercial TiO₂ Degussa P25 supported Au catalysts (Au/P25-P) with the assistance of the deposition-precipitation procedure. The influences of the plasma reduction time and calcination on the performance of the Au/P25-P catalysts were investigated. CO oxidation was performed to investigate the catalytic activity of the Au/P25 catalysts. The results show that DBD cold plasma for the fabrication of Au/P25-P catalysts is a fast process, and Au/P25-P (4 min) exhibited the highest CO oxidation activity due to the complete reduction of Au compounds and less consumption of oxygen vacancies. In order to form more oxygen vacancies active species, Au/P25-P was calcined to obtain Au/P25-PC catalysts. Interestingly, Au/P25-PC exhibited the highest activity for CO oxidation among the Au/P25 samples. The results of transmission electron microscopy (TEM) indicated that the smaller size and high distribution of Au nanoparticles are the mean reasons for a high performance of Au/P25-PC. Atmospheric-pressure DBD cold plasma was proved to be of great efficiency in preparing high performance supported Au catalysts.
- atmospheric-pressure cold plasma,
- dielectric barrier discharge (DBD),
- Au,
- TiO₂,
- CO oxidation

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References

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