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Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition–precipitation method ☆

Paper ID Volume ID Publish Year Pages File Format Full-Text
52437 46874 2007 5 PDF Available
Title
Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition–precipitation method ☆
Abstract

Alumina-supported ruthenium catalysts were prepared by the deposition–precipitation (DP) and impregnation (IMP) methods. The catalysts were characterized by BET surface area, X-ray diffraction, temperature-programmed reduction (TPR) and diffused reflectance infra-red spectroscopic (DRIFTS) techniques. The DP catalysts showed higher activity than their IMP analogues. The DRIFTS analysis revealed preferential formation of Run+ species on the surface of DP catalysts. Both Run+ and Ru0 species appeared on IMP catalysts, with the composition of Ru0 increasing with increase in metal loading. The temperatures at which the peak maxima appeared were higher in the TPR patterns of the DP catalysts, indicating greater interaction between Ru and alumina, which explained the formation of the cationic Ru species. The high activity of the catalysts prepared by DP method was related to the formation of electron deficient Ru sites during the preparation of the catalyst.

Keywords
N2O Decomposition; Temperature-programmed reduction; X-ray diffraction; Ru Catalyst; DRIFTS
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Direct decomposition of nitrous oxide over Ru/Al2O3 catalysts prepared by deposition–precipitation method ☆
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 9, September 2007, Pages 1406–1410
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
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