煅烧
钙钛矿(结构)
甲苯
柠檬酸
初湿浸渍
X射线光电子能谱
催化作用
材料科学
无机化学
吸附
核化学
化学工程
化学
有机化学
选择性
工程类
作者
M. Alifanti,Mihaela Florea,Simona Şomăcescu,VI Parvulescu
标识
DOI:10.1016/j.apcatb.2005.02.018
摘要
Supported LaCoO3 perovskites with 10 and 20 wt.% loading were obtained by incipient wetness impregnation of different Ce1−xZrxO2 (x = 0–0.3) supports with a “citrate” solution, prepared from La and Co nitrates, and citric acid. Ce1−xZrxO2 were also prepared using the “citrate method”. All materials were calcined at 700 °C for 6 h and investigated by N2 adsorption at −196 °C, XRD and XPS. XRD patterns evidenced the formation of a pure perovskite phase. These materials were tested in toluene total oxidation in the temperature range 100–500 °C. All catalysts showed a lower T50 than the corresponding Ce1−xZrxO2 supports or pure LaCoO3 perovskite. The activity of the catalysts was found to increase with the perovskite loading, irrespective of the support composition. For the same loading, the support composition influences drastically the oxidative abilities of LaCoO3.
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