fulltext.study @t Gmail

Role of water in the CO oxidation reaction on Au/CeO2: Modification of the surface properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
47901 46485 2008 6 PDF Available
Title
Role of water in the CO oxidation reaction on Au/CeO2: Modification of the surface properties
Abstract

A metallic monolith coated with 1% Au/CeO2 catalyst has been calcined at 300 °C and tested in the CO oxidation reaction both in “dry” and “wet” conditions. The light-off curves show a positive effect of the presence of water in the reactive feed on the catalytic activity. With the aim to explain these observations, a FTIR CO adsorption study at liquid nitrogen temperature was performed over a similar powder catalyst. At this low temperature the oxygen mobility from the bulk to the surface is minimized and then surface phenomena are evidenced. Both, the effect of different pre-treatments of the catalysts and the presence of pre-adsorbed water on the surface have been examined. The studies reveal that the previous treatment of the sample deeply affects the surface species and the gold particle size. The water addition provokes oxidation of the surface and improves the CO oxidation activity.

Keywords
Gold; CO oxidation; Water; FTIR; Oxidation state
First Page Preview
Role of water in the CO oxidation reaction on Au/CeO2: Modification of the surface properties
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: Applied Catalysis B: Environmental - Volume 84, Issues 1–2, 25 October 2008, Pages 119–124
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