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本文运用吸附二氧化碳、氧气、一氧化碳和正丁胺的TPD技术,对SrO表面活性中心的种类和分布进行了研究。发现在921K和1173K有二个二氧化碳的脱附峰,且高温脱附峰极大;在436K和673K附近有二个氧的脱附峰,高温脱附峰也很大;在673~873K之间有一分布不很明显的一氧化碳脱附峰,但在973K附近有很大的一氧化碳脱附峰;在实验条件下,没有与正丁胺有关的脱附峰出现。这些结果表明了SrO表面不但有强和较多的碱中心,而且有活化氧中心和单电子中心
In this paper, the type and distribution of SrO surface active sites were studied using TPD technology which adsorbed carbon dioxide, oxygen, carbon monoxide and n-butylamine. It was found that there are two carbon dioxide desorption peaks at 921K and 1173K, and the high temperature desorption peak is very large. There are two oxygen desorption peaks at 436K and 673K, and the high temperature desorption peaks are also very large. Between 673 and 873K There is a well-distributed carbon monoxide desorption peak but a large carbon monoxide desorption peak near 973K; under the experimental conditions, no desorption peak associated with n-butylamine appears. These results indicate that the SrO surface not only has strong and more base centers but also active oxygen centers and single electron centers