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Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
52649 46880 2007 4 PDF Available
Title
Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation
Abstract

Different structural and electronic states of gold species in H-mordenite with SiO2/Al2O3 molar ratio 206 and their transformations under redox treatments have been studied by the methods of diffuse reflectance UV–visible spectroscopy and FTIR spectroscopy of adsorbed CO. Different states of ionic and metallic gold were detected in the zeolite channels and on the external surface of the zeolite – Au+ and Au3+ ions, charged clusters Aunδ+, and neutral nanoparticles Aum. Catalytic tests of the samples revealed the co-existence of several types of active species of gold in CO oxidation – gold clusters <1.5 nm (responsible for low-temperature activity) and gold nanoparticles (responsible for high-temperature activity).

Keywords
Gold; Zeolite; Catalyst; Active sites; Oxidation
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Co-existance of various active gold species in Au-mordenite catalyst for CO oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 7, July 2007, Pages 977–980
Authors
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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
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