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

[Display omitted] •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...

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Published inApplied catalysis. A, General Vol. 519; pp. 7 - 15
Main Authors Albaladejo-Fuentes, Vicente, López-Suárez, Franz Edwin, Sánchez-Adsuar, María Salvadora, Illán-Gómez, María José
Format Journal Article
LanguageEnglish
Published Elsevier B.V 05.06.2016
Subjects
BaTiO3 perovskite
Diesel soot oxidation
Hydrothermal method
NOx storage
Sol-gel method
NOx storage
Hydrothermal method
BaTiO3 perovskite
Sol-gel method
Diesel soot oxidation
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Summary:[Display omitted] •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
ISSN:0926-860X
1873-3875
DOI:10.1016/j.apcata.2016.03.022