NDLI: Effects of Tb and Ba introduction on the reaction mechanism of direct NO decomposition over C-type cubic rare earth oxides based on Y<sub>2</sub>O<sub>3</sub>

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Catalysis Science & Technology Vol - 3 Issue - 7

Catalysis Science & Technology Vol - 3 Issue - 6

Catalysis Science & Technology Vol - 3 Issue - 5

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Catalysis Science & Technology Vol - 3 Issue - 3

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Catalysis Science & Technology Vol -1

Effects of Tb and Ba introduction on the reaction mechanism of direct NO decomposition over C-type cubic rare earth oxides based on Y₂O₃

Content Provider	Royal Society of Chemistry (RSC)
Author	Masui, Toshiyuki Tsujimoto, Soichiro Imanaka, Nobuhito Yasuda, Keisuke
Copyright Year	2013
Abstract	C-type cubic Y2O3, (Y0.70Tb0.30)2O3+δ, and (Y0.99−xTbxBa0.01)2O2.99+δ (x = 0, 0.10, 0.20, 0.30, and 0.40) were prepared to investigate their catalytic performance for NO decomposition. In the direct NO decomposition process, NO is adsorbed on basic sites of the catalyst surface to form adsorbed nitrosyl, and the number of basic sites affects the NO decomposition activity. In particular, the negative effect of CO2 presence on the catalytic activity is related to the number of the surface basic sites. Furthermore, it was evidenced from temperature programmed desorption (TPD) of NO and IR measurements that adsorbed nitrosyl reacts with gas-phase NO and decomposes to N2. The effects of Ba2+ and Tb3+/4+ introduction on the activity of the catalyst are discussed based on this NO reaction mechanism. It is concluded that the principal effects of Ba2+ doping are an increase in the number of basic sites and the generation of oxide anion vacancies in the lattice. In addition, we demonstrate that Tb3+/4+ ions in the lattice facilitate O2 desorption and act as NO adsorption sites, so that the catalytic activity is significantly enhanced by Tb3+/4+ introduction, despite the small number of basic sites on the catalyst surface.
Starting Page	1928
Ending Page	1936
Page Count	9
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	3
Issue Number	8
Journal	Catalysis Science & Technology
DOI	10.1039/c3cy20746c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Oxygen Adsorption Reaction mechanism Dopant Ion C-type asteroid Crystal structure
Content Type	Text
Resource Type	Article
Subject	Catalysis

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Direct Decomposition of NO into N2 and O2 Over C-type Cubic Y2O3-Tb4O7-ZrO2

Direct Decomposition of NO on C-type Cubic Rare Earth Oxides Based on $Y_{2}O_{3}$

Effect of oxygen vacancies on direct $N_{2}$O decomposition over $ZrO_{2}-Y_{2}O_{3}$ catalysts

Direct Decomposition of NO on Ba Catalysts Supported on Ce–Fe Mixed Oxides

Direct Decomposition of NO on Ba Catalysts Supported on Ce–Fe Mixed Oxides

OXYGEN TRANSPORT PROPERTIES OF RARE EARTH OXIDES.

Direct Decomposition of NO on Ba/Ba–Y–O Catalyst

Crystal structure, short-range oxygen defects, and water adsorption in La- and Nd-modified ZrO{sub 2}

Advanced EXAFS analysis techniques applied to the L-edges of the lanthanide oxides.

Effects of Tb and Ba introduction on the reaction mechanism of direct NO decomposition over C-type cubic rare earth oxides based on Y₂O₃

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