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ID 48087
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Author
Tanaka, Toshiyuki
Tajima, Ichirou
Kato, Yuichi
Shinjoh, Hirofumi
Abstract
A Ba-Ti composite oxide was formed on a NOx storage and reduction catalyst via impregnation of a Ba-Ti precursor solution composed of H(2)O(2) added to a complex prepared using the citric acid method. The structure of the Ba-Ti composite in solution was analyzed by chemical composition analysis and FT-Raman and UV-vis spectroscopy. MM2 calculations were performed to propose its chemical structure. Both Ba and Ti together were found to form a composite molecule in the solution. Furthermore, TEM-EDX and XRD analyses of the Ba-Ti composite oxide on the catalyst prepared by impregnation with the Ba-Ti composite aqueous solution revealed that Ba and Ti in the catalyst were highly dispersed at the nm scale. The formation of the Ba-Ti composite oxide on the NSR catalyst enhanced sulfur desorption efficiency and led to high-performance NO(X) conversion as a NO(X) storage and reduction activity catalyst after desulfation treatment. It was assumed that the existence of nano-scaled Ba compounds combined with Ti was efficient for the inhibition of the sintering of barium sulfate and its facile decomposition. It was found that dispersion of Ba compounds for NO(X) storage materials using a Ba-Ti complex solution is an efficient way to improve the durability of NSR catalysts.
Published Date
2011-02-22
Publication Title
Applied Catalysis B: Environmental
Volume
volume102
Issue
issue3-4
Publisher
Elsevier Science BV.
Start Page
620
End Page
626
ISSN
0926-3373
NCID
AA1082551X
Content Type
Journal Article
Project
Research Center of New Functional Materials for Energy Production, Storage, and Transport
language
英語
Copyright Holders
© 2011 Elsevier B.V. All rights reserved.
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author
Refereed
True
DOI
Web of Sience KeyUT