fulltext.study @t Gmail

Selective CO oxidation with nano gold particles-based catalysts over Al2O3 and ZrO2

Paper ID Volume ID Publish Year Pages File Format Full-Text
42893 45945 2008 10 PDF Available
Title
Selective CO oxidation with nano gold particles-based catalysts over Al2O3 and ZrO2
Abstract

We present the preparation, characterization and catalytic evaluation of gold-based catalysts over Al2O3, ZrO2 and 10% ZrO2/Al2O3 in selective CO oxidation. Oxidation and reduction pretreatments were evaluated using in situ X-ray diffraction, and the size of gold particles was determined. All catalysts contained gold particles in the range of 2–5 nm, with as-prepared samples containing a mixture of gold species (Au3+ and Au0). The catalytic tests showed complete CO oxidation at temperatures lower than 100 °C, with Au/ZrO2 sample presenting the best performance. Both the support and pretreatment conditions were found to cause changes to gold species. In situ X-ray diffraction patterns indicated the presence of different gold phases and of nanometer-scale crystallites of gold, which was confirmed by transmission electron microscopy results. It was also found that cationic gold improved the activity of Au/ZrO2. Concerning stability, time on stream tests showed that all samples were stable to coke deposition and sintering.

Graphical abstractGold catalysts nano-dispersed on oxide supports Al2O3, ZrO2 and 10% ZrO2/Al2O3 were evaluated in selective CO oxidation. In situ XRD experiments were performed to identify the active phase and the average size during reaction. No significant changes were observed in the average size after 60 h on stream, and that the active phase depends strongly on the support.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Gold; Nanoparticles; CO oxidation; In situ XRD
First Page Preview
Selective CO oxidation with nano gold particles-based catalysts over Al2O3 and ZrO2
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 A: General - Volume 347, Issue 1, 1 September 2008, Pages 62–71
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