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用X射线光电子能谱(XPS)研究了Cu/SiO_2加氢催化剂,包括催化剂制备过程中存在的铜氨络合物—Cu(NH_3)_4R_2的结构、催化剂中活性组分铜和载体硅胶间的相互作用、催化剂制备各阶段铜价态的变化、制备条件和催化活性的关系及催化剂在使用中失活的原因。讨论了催化剂制备过程中的反应机理。
The structure of Cu (NH 3) _ 4 R 2 Cu / SiO 2 hydrogenation catalysts was studied by X-ray photoelectron spectroscopy (XPS), including the presence of Cu (NH 3) 4 R 2 in the catalyst. Interactions, changes in copper valances at various stages of catalyst preparation, the relationship between preparation conditions and catalytic activity, and reasons for catalyst inactivation during use. The reaction mechanism in the preparation of catalyst was discussed.