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Tailoring the properties of BaTi0.8Cu0.2O3 catalyst selecting the synthesis method

Paper ID Volume ID Publish Year Pages File Format Full-Text
38893 45796 2016 9 PDF Available
Title
Tailoring the properties of BaTi0.8Cu0.2O3 catalyst selecting the synthesis method
Abstract

•BaTiO3 and BaTi0.8Cu0.2O3 perovskites were synthesized using sol-gel and hydrothermal methods.•The location of copper in the catalyst depends on the synthesis method.•Cu-BTOsg, with Cu incorporated into the structure, presents a high NOx storage capacity.•Cu-BBOH, with CuO highly dispersed on the surface, shows a high activity for NO to NO2 oxidation.

The effect of the synthesis method (hydrothermal and sol-gel) on the properties of BaTi0.8Cu0.2O3 perovskites as catalysts for NOx and soot removal has been analyzed. X-ray powder diffraction (XRD), X-ray Photoelectron Spectroscopy (XPS), ICP-AES, N2 adsorption at −196 °C, Raman spectroscopy, Field Emission Scanning Electron Microscopy (FESEM) and temperature programmed reduction with hydrogen (H2-TPR) have been used for catalysts characterization. To test their catalytic activity, NOx storage and soot combustion temperature programmed reaction tests have been carried out.The results allow to conclude that the synthesis method determines the position of copper on the perovskite structure and, therefore, the catalytic applications. When the hydrothermal method is used the copper is highly dispersed on the perovskite surface, obtaining a catalyst with a high activity for the NO to NO2 oxidation reaction, which can be used as oxidation catalyst for soot removal. Nevertheless, using the sol-gel method, copper is incorporated into the perovskite structure and, consequently, the catalyst presents a high NOx storage capacity

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Keywords
BaTiO3 perovskite; Sol-gel method; Hydrothermal method; NOx storage; Diesel soot oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 519, 5 June 2016, Pages 7–15
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
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Price after discount Only $4.95
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