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U-Sb氧化物是烯烃选择性氧化和氨氧化的有效催化剂之一,具有很高的活性和选择性。文献中对该催化剂的体相结构进行了深入的研究,证明活性相是USb_3O_(10),晶格中铀、锑和氧分别处于一种、二种和四种不同的位置。但关于催化剂表面层的组成和结构的研究尚未引起人们的充分注意,而这对于了解催化剂的特征是十分重要的。XPS和AES技术是表征催化剂表面结构的重要工具,Cross和Seiyama等人利用XPS和SIMS对Sn-Sb和Fe-Sb氧化物催化剂进行的研究表明,这两种催化剂的表层和体相的组成和结构是不同的。本
U-Sb oxide is one of the effective catalysts for selective oxidation of olefins and ammoxidation, with high activity and selectivity. In the literature, the phase structure of the catalyst has been studied in depth, and the active phase is proved to be USb_3O_ (10). The uranium, antimony and oxygen in the crystal lattice are in one, two and four different positions respectively. However, the research on the composition and structure of the catalyst surface layer has not attracted sufficient attention, and this is very important for understanding the characteristics of the catalyst. XPS and AES techniques are important tools to characterize the surface structure of catalysts. Cross and Seiyama et al. Conducted a study on Sn-Sb and Fe-Sb oxide catalysts using XPS and SIMS. The results show that the surface and bulk compositions and The structure is different. this