EFFECT OF COOPER ON THE CATALYTIC ACTIVITY FOR ACETYLACETATE COMBUSTION OF Ca1-x Cu xZrO3 AND Sr1-xCu xZrO3 PEROVSKITE-TYPE OXIDES

Journal of The Chilean Chemical Society

PECCHI, GINA¹  MORALES, RUDDY¹ 

[1] Universidad de Concepción, Concepción, Chile

关键词: zirconate;    calcium;    strontium;    copper;    perovskites;    acetyl acetate.;   

DOI  :  10.4067/S0717-97072013000400006

学科分类：化学（综合）

来源: Sociedad Chilena de Quimica

【 摘 要 】

The effect of lower Cu (≤30%) substitution on alkaline earth zirconate (A1-xCuxZrO3;A=Ca; Sr) perovskites prepared via a citrate route and calcined at700°C has been investigated as catalysts for total acetyl acetate combustion.The thermal behaviour indicates a beneficial effect of Cu in order to decreasethe decomposition temperature of Ca and Sr zirconates. The characterizationof the solids by atomic absorption spectroscopy (AAS), BET area, SEM, XRD, O2-DTPand TPR indicates for the Sr series presence crystalline CuO phase in the copperstrontium zirconates, meanwhile almost highly dispersed CuO is detected in theCa series. Two effects explain the increases in the total acetylacetate combustionof Ca and Sr zirconates upon copper content. For one hand, in the Ca series,highly dispersed CuO phase, easier to be reduced increases the catalytic activity,meanwhile for the Sr series, a large extent of oxygen vacancies explains thecatalytic effect.

【 授权许可】

Unknown