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Preparation of RhOx/CeyPr1−yO2 N2O decomposition catalysts by rhodium nitrate impregnation with different solvents

Paper ID Volume ID Publish Year Pages File Format Full-Text
39797 45836 2014 9 PDF Available
Title
Preparation of RhOx/CeyPr1−yO2 N2O decomposition catalysts by rhodium nitrate impregnation with different solvents
Abstract

•Ceria doping with 10% Pr had a positive effect on RhOx-support interaction.•The benefit on the catalytic activity was only obtained for water impregnation.•Ethanol and acetone promoted Ce0.9Pr0.1O2 and RhOx sintering.•The RhOx and Ce0.5Pr0.5O2 interaction was not as good as that with Ce0.9Pr0.1O2.

The effect of the solvent (water, ethanol or acetone) used to impregnate CeyPr1−yO2 (y = 1, 0.9 or 0.5) supports with rhodium nitrate, in order to prepare N2O decomposition catalysts, has been studied. RhOx/CeyPr1−yO2 catalysts were prepared and characterized by N2 adsorption at −196 °C, XRD, Raman spectroscopy, TEM, XPS and H2-TPR. The activity for N2O decomposition of the catalysts studied was related with the RhOx-support interaction, and both the nature of the ceria support and of the solvent used for rhodium impregnation affected such interaction. Ceria doping with 10% praseodymium had a positive effect in the RhOx-support interaction, but the benefit on the catalytic activity was only obtained for water impregnation because the temperature peaks created during calcination of ethanol and acetone-impregnated catalysts promoted Ce0.9Pr0.1O2 and RhOx sintering. The interaction between RhOx and Ce0.5Pr0.5O2 was not as good as that with Ce0.9Pr0.1O2. The best catalyst was obtained by impregnating Ce0.9Pr0.1O2 with a water solution of rhodium. However, if acetone or ethanol must be used for any reason the pure ceria support is more suitable (under the calcination conditions of this study; 250 to 500 °C at 10 °C/min) because do not sinters during solvents combustion.

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Keywords
Ceria catalyst; Rhodium catalyst; N2O decomposition; Metal-support interaction
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Preparation of RhOx/CeyPr1−yO2 N2O decomposition catalysts by rhodium nitrate impregnation with different solvents
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 472, 22 February 2014, Pages 134–142
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
Online Support
Any Questions? feel free to contact us