On the optimal Cs/Co ratio responsible for the N2O decomposition activity of the foam supported cobalt oxide catalysts

Structured foam catalysts for N2O decomposition containing Co and Cs were prepared via conventional and organic-assisted impregnation method (acetic acid, citric acid, glycerol, glycine, urea). Organic-assisted impregnation caused higher abundance of smaller particles and different faceting. Glycero...

Full description

Saved in:
Bibliographic Details
Published inArabian journal of chemistry Vol. 16; no. 12; p. 105311
Main Authors Klegova, Anna, Pacultová, Kateřina, Kiška, Tomáš, Gryboś, Joanna, Sojka, Zbigniew, Obalová, Lucie
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2023
Elsevier
Subjects
Ceramic foam
Cesium effect
Cobalt oxide
N2O decomposition
Supported Catalyst
Cobalt oxide
Cesium effect
Ceramic foam
Supported Catalyst
N2O decomposition
Online AccessGet full text

Cover

More Information
Summary:Structured foam catalysts for N2O decomposition containing Co and Cs were prepared via conventional and organic-assisted impregnation method (acetic acid, citric acid, glycerol, glycine, urea). Organic-assisted impregnation caused higher abundance of smaller particles and different faceting. Glycerol usage leads to increase of specific rate constant for N2O decomposition, urea leads to its decrease. The optimal amount of Cs in Co3O4deposited on the foam was 2–3 times higher than in the bulk Co3O4-Cs due to the dispersion of part of the Cs species over the bare support. The use of glycerol caused a better surface coverage by spinel phase, thus leaving less space for spreading the cesium on the support instead of on the spinel phase. The positive effect of glycerol on the performance of the catalysts with optimized cesium content was attributed to refaceting of the spinal nanocrystals, and greater resistance of the (100) planes to gaseous NO/H2O contaminates.
ISSN:1878-5352
1878-5379
DOI:10.1016/j.arabjc.2023.105311