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Catalytic activity of rhodium grafted on ordered mesoporous silica materials modified with aluminum in N2O decomposition

Paper ID Volume ID Publish Year Pages File Format Full-Text
53577 46975 2015 8 PDF Available
Title
Catalytic activity of rhodium grafted on ordered mesoporous silica materials modified with aluminum in N2O decomposition
Abstract

•Mesoporous ordered silica materials were used as supports for catalysts.•Aluminum and rhodium were grafted on silica surface.•Catalysts were tested in the reaction of N2O decomposition.•Al(incorporated)-MCM-41 showed the highest catalytic activity.•Al(incorporated)-MCM-41 enhanced rhodium dispersion on the silica support.

Three different ordered mesoporous silica materials, such as MCM-41, Al-containing MCM-41 (with 1.6 wt% of Al incorporated into the silica framework) and SBA-15, were prepared. Furthermore, aluminum (1.8 wt%) was grafted on the silica surface by the molecular designed dispersion method (MDD). In a next step, rhodium (1.4–2.9 wt%), as an active metal for the catalytic reaction of N2O decomposition, was introduced by the MDD technique. The following order of the catalytic activity was found under an inert atmosphere: Al(incorporated)-MCM-41 + Rh > MCM-41 + Al(grafted) + Rh > SBA-15 + Rh ≈ MCM-41 + Rh. The influence of textural properties, total acidity and rhodium dispersion on the activity of catalysts was studied.

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Keywords
Mesoporous ordered silica; Aluminum; Rhodium; Grafting; N2O decomposition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 257, Part 1, 15 November 2015, Pages 51–58
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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