在催化剂制备过程中通过选择CH_3OH—NaOH,NaBH(,H_20,CH_3OH—H_2O为还原体系制备了四个聚N—乙烯基吡咯烷酮分散钯催化剂,它的结构经x—射线光电子能谱,透射电镜,x—射线衍射等表征。考察了催化剂对丙烯酸甲酯的加氢性能。实验结果表明钯的价态,钯微粒的分散状态以及催化剂的加氢活性都与还原体系有关。经CH_3OH—NaOH还原制备的催化剂分散状态最好,加氢活性最高。 In the process of catalyst preparation, four poly-N-vinylpyrrolidone dispersed palladium catalysts were prepared by selecting CH_3OH-NaOH and NaBH (, H_20 and CH_3OH-H_2O) as reducing systems. The structure of the catalyst was characterized by X-ray photoelectron spectroscopy, transmission electron microscopy, X-ray diffraction, etc. The hydrogenation performance of the catalyst on methyl acrylate was investigated.The experimental results show that the valence of palladium, the dispersion state of palladium particles and the hydrogenation activity of the catalyst are related to the reduction system.After reduction by CH_3OH-NaOH The best catalyst dispersion state, the highest hydrogenation activity.