Generation of mixed metal oxides by use of an ultrasonic aerosol thermal decomposition process

被引:12
作者
Fortunato, P
Reller, A
Oswald, HR
机构
[1] Univ Zurich, Inst Inorgan Chem, CH-8057 Zurich, Switzerland
[2] Univ Hamburg, Inst Inorgan & Appl Chem, D-20146 Hamburg, Germany
关键词
ultrasonic spray pyrolysis; spinel; catalytic oxidation;
D O I
10.1016/S0167-2738(97)00229-4
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
A novel technique involving the pyrolysis of an ultrasonically atomized solution has been used to prepare finely dispersed submicron sized spinel-type Cu1.1Mn1.9O4 powders with spherical morphology. The decomposition temperature of the aerosol as well as the total concentration of the solution have been varied to study the influence on the structural, thermochemical and morphological features. Together with X-ray diffractometry (XRD), thermal analysis (TA), and X-ray photoelectron spectroscopy (XPS) results it became obvious that the Cu1.1Mn1.9O4-spinel exists in a metastable state. Turnover-rates of catalytic CO-oxidation with molecular oxygen near room temperature gave good yields, but depended on the activation procedure of the spinel.
引用
收藏
页码:85 / 89
页数:5
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