fulltext.study @t Gmail

Atmospheric-pressure O2 plasma treatment of Au/TiO2 catalysts for CO oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
53956 46990 2015 6 PDF Available
Title
Atmospheric-pressure O2 plasma treatment of Au/TiO2 catalysts for CO oxidation
Abstract

•Atmospheric-pressure O2 cold plasma is explored to treat Au/TiO2 catalyst.•The plasma-treated catalyst exhibits higher activity than the calcined one.•The plasma-treated catalyst has small particle size and narrow size distribution.•The plasma-treated catalyst possesses plentiful low-coordinated Au species.

Atmospheric-pressure O2 plasma generated by dielectric barrier discharge (DBD) is applied to treat Au/TiO2 catalysts synthesized via the deposition–precipitation method for CO oxidation. The plasma-treated sample (S-P) presents a higher activity than the calcined one (S-C). To elucidate the plasma treatment effect, XPS, TEM/HRTEM, sub-ambient pulse CO chemisorption and in situ DRIFTS techniques were used for catalyst characterization. In comparison with S-C, TEM/HRTEM reveals that the S-P catalyst has small particle size and narrow size distribution; XPS and DRIFTS analyses indicate plentiful surface hydroxyl groups on S-P sample. Pulse CO chemisorption and in situ DRIFTS of CO adsorption show that significant increase of low-coordinated Au species has been achieved by the plasma treatment. The improved activity of S-P is ascribed to large amount of low-coordinated Au species and interface active sites as well as abundant surface hydroxyl groups.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (143 K)Download as PowerPoint slide

Keywords
O2 plasma; Atmospheric pressure; Au/TiO2 catalysts; CO oxidation
First Page Preview
Atmospheric-pressure O2 plasma treatment of Au/TiO2 catalysts for CO oxidation
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 256, Part 1, 1 November 2015, Pages 142–147
Authors
, , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us