Effect of precursor synthesis on catalytic activity of Co3O4 in N2O decomposition

被引：77

作者：

Chromcakova, Zaneta ^{[1
,2
]}

Obalova, Lucie ^{[1
,2
]}

Kovanda, Frantisek ^{[5
]}

Legut, Dominik ^{[1
,3
]}

Titov, Andrii ^{[4
]}

Ritz, Michal ^{[2
]}

Fridrichova, Dagmar ^{[1
]}

Michalik, Svatopluk ^{[1
,2
]}

Kustrowski, Piotr ^{[6
]}

Jiratova, Kvetuse ^{[7
]}

机构：

[1] Tech Univ Ostrava, Inst Environm Technol, Ostrava 70833, Czech Republic

[2] Tech Univ Ostrava, Fac Met & Mat Engn, Ostrava 70833, Czech Republic

[3] Tech Univ Ostrava, Ctr IT4Innovat, Ostrava 70833, Czech Republic

[4] Tech Univ Ostrava, Nanotechnol Ctr, Ostrava 70833, Czech Republic

[5] Univ Chem & Technol Prague, Tech 5, Prague 16628, Czech Republic

[6] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

[7] Acad Sci Czech Republic, Inst Chem Proc Fundamentals, CR-16502 Prague, Czech Republic

来源：

CATALYSIS TODAY | 2015年 / 257卷

关键词：

Cobalt spinel; Co3O4; catalyst; N2O decomposition; Precursor synthesis; COBALT OXIDE CATALYSTS; NITROUS-OXIDE; SPINEL; PROMOTION; SURFACE; METALS; OXYGEN;

D O I：

10.1016/j.cattod.2015.03.030

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Series of precursors was prepared by precipitation of cobalt nitrate in aqueous solutions using various precipitation agents (NH3 center dot H2O, NaOH, Na2CO3) and reactions conditions (OH/Co molar ratio, aging time). Powder XRD showed different phase composition of the obtained precursors, in which beta-Co(OH)(2), Co-II-Co-III layered double hydroxide, and basic cobalt carbonate were identified. Only Co3O4 spinel-like oxide was found in products after heating at 500 degrees C in air but different N2O conversions were observed over the examined oxide catalysts. Especially the catalysts obtained from beta-Co(OH)(2) precursors showed high catalytic activity in N2O decomposition. The correlation between methods of preparation, phase composition of precursors, catalytic properties of the related oxide catalysts, and the role of the cobalt ions as catalytic active sites is discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：18 / 25

页数：8

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