Effect of oxygen vacancies on direct N2O decomposition over ZrO2-Y2O3 catalysts

被引：11

作者：

Cho, Chang-Min ^{[1
]}

Nunotani, Naoyoshi ^{[1
]}

Imanaka, Nobuhito ^{[1
]}

机构：

[1] Osaka Univ, Fac Engn, Dept Appl Chem, 2-1 Yamadaoka, Suita, Osaka 5650871, Japan

来源：

JOURNAL OF ASIAN CERAMIC SOCIETIES | 2019年 / 7卷 / 04期

关键词：

Catalyst; direct nitrous oxide decomposition; oxygen vacancy; fluorite-type structure; C-type structure; SUPPORTED RH; OXIDE; SITES; EQUILIBRIUM; TEMPERATURE; ADSORPTION; NITROGEN; SYSTEM; ACID; O-2;

D O I：

10.1080/21870764.2019.1675941

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of oxygen vacancies on catalytic activity for direct N2O decomposition was demonstrated in Zr1-xYxO2-delta solid solutions with a fluorite-related structure. The fluorite-type structure was formed as samples with a small amount of Y3+ (0.05 <= x <= 0.19) and a large amount of Y3+ (x >= 0.80), leading to the generation of a C-type structure derived from the fluorite-type structure by removing a quarter of the oxide anions. The oxygen vacancies worked as N2O adsorption sites and catalytic active sites, with the highest activity realized by the YO1.5 catalyst with a C-type structure, which contained the largest number of oxygen vacancies in the ZrO2-Y2O3 system.

引用

页码：518 / 523

页数：6

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