Potassium-doped CO3O4 catalyst for direct decomposition of N2O

被引：204

作者：

Asano, Kimihiro ^{[1
]}

Ohnishi, Chie ^{[1
]}

Iwamoto, Shinji ^{[1
]}

Shioya, Yasushi ^{[2
]}

Inoue, Masashi ^{[1
]}

机构：

[1] Kyoto Univ, Dept Energy & Hydrocarbon Chem, Grad Sch Engn, Kyoto 6158510, Japan

[2] Sud Chem Catalysts Japan Inc, Toyama 9392753, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2008年 / 78卷 / 3-4期

关键词：

N2O decomposition; CO3O4; catalyst; alkali promoting effect; redox mechanism;

D O I：

10.1016/j.apcatb.2007.09.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Direct decomposition of nitrous oxide (N2O) on K-doped CO3O4 catalysts was examined. The K-doped CO3O4 catalyst showed a high activity even in the presence of water. In the durability test of the K-doped CO3O4 catalyst, the activity was maintained at least for 12 h. It was found that the activity of the K-doped CO3O4 catalyst strongly depended on the amount of K in the catalyst. In order to reveal the role of the K component on the catalytic activity, the catalyst was characterized by XRD, XPS, TPR and TPD. The results suggested that regeneration of the Co2+ species from the Co3+ species formed by oxidation of Co2+ with the oxygen atoms formed by N2O decomposition was promoted by the addition of K to the CO3O4 catalyst. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：242 / 249

页数：8

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