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前 言 高分子负载的Pd催化剂适用于烯烃,硝基化合物的加氢反应,我们在高分子负载的Pd催化剂中添加第二补金属可较大幅度地提高催化活性,使贵金属得以充分利用。本文用580-B型双光束红外光谱仪考察了金属与载体间的相互作用;用ES-CAL AR-MKⅡX-射线光电子能浩仪研究了催化剂的表面物种及电子结合能,以探讨添加第二种金属的作用机现。结果表明:对烯烃加氢起作用的是金属态钯,催化剂中金属与载体无明显的相互作用催化剂的活性得以改变是由于Pd与添加的第二种金属(Sn、Pb)存在着较强的相互作用。
Introduction The polymer-supported Pd catalyst is suitable for the hydrogenation of olefins and nitro compounds. The addition of the second metal supplement to the Pd catalyst supported by polymer can greatly improve the catalytic activity and make full use of the noble metal. In this paper, 580-B double-beam infrared spectroscopy was used to investigate the interaction between the metal and the support. The surface species and electron binding energy of the catalyst were investigated by ES-CAL AR-MKⅡX-ray photoelectron spectroscopy. The role of metal is now. The results show that the catalytic hydrogenation of olefins is metallic palladium. The catalytic activity of the catalyst is changed without any significant interaction between the metal and the support due to the strong presence of Pd and the added second metal (Sn, Pb) interaction.