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Catalyst regeneration and activity enhancement of Au/TiO2 by atmospheric pressure nonthermal plasma

Paper ID Volume ID Publish Year Pages File Format Full-Text
44104 46003 2007 6 PDF Available
Title
Catalyst regeneration and activity enhancement of Au/TiO2 by atmospheric pressure nonthermal plasma
Abstract

In this work, a nonthermal plasma was applied to the TiO2-supported gold nanoparticle catalysts (Au/TiO2) for the catalyst regeneration and the enhancement of catalytic activity for CO oxidation. Exposure to the 100 ppm toluene or C3H6 resulted in rapid deactivation of the Au/TiO2 catalyst. Oxygen plasma and O3 injection were found to be effective in the regeneration of the deactivated Au/TiO2 catalysts. The adsorbed toluene or C3H6 preferentially decomposed to CO2 regardless of the regeneration method. Direct application of nonthermal plasma greatly enhanced the CO oxidation not only over the completely deactivated Au/TiO2 catalysts, but also over the Au/TiO2 catalysts prepared by the impregnation method, which showed no catalytic activity without plasma.

Graphical abstractThis paper describes the application of atmospheric pressure nonthermal plasmas for the oxidation of CO over gold (Au) nanoparticle catalysts. Nonthermal plasma was used for two different purposes of the regeneration of the deactivated Au/TiO2 catalyst and the enhancement of catalytic activity by in situ plasma. Oxygen plasma and O3 injection were found to be effective in the regeneration of the deactivated Au/TiO2 catalysts. In situ plasma greatly enhanced the CO oxidation over both the deactivated catalysts and Au/TiO2 catalyst prepared by an impregnation method.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Nonthermal plasma; Gold nanoparticle; Tu/TiO2; CO oxidation; Oxygen plasma; Ozone injection
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Catalyst regeneration and activity enhancement of Au/TiO2 by atmospheric pressure nonthermal plasma
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 329, 1 October 2007, Pages 93–98
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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