摘要
利用硅胶表面的弱酸性和吸附性能,将某些碱性聚合物吸附在硅胶表面上,然后与PdCl_2络合,经还原,合成了硅胶负载的聚乙烯基吡啶-钯催化剂。用XPS、UV-Vis、电子显微镜等手段研究了催化剂的结构,观察了制备条件、组成等因素对其性能的影响。研究了各种反应条件与催化剂活性的关系及催化剂的稳定性和使用寿命。合成的催化剂对丙烯酸甲酯等底物具有很高的催化加氢活性。
Some basic polymers, such as poly-4-vinylpyridine and poly-2-vinylpyridine, were adsorbed on the surface of silica gel with the aid of the weak acidity of silica. The supported polymers were then complexed with PdCl2 and reduced with NaBH4, the title catalysts were synthesized. The structures of the catalysts were characterized by XPS, UV/Vis, scanning and transmission electron microscope etc. The influence of preparation conditions and composition of the catalysts on the catalytic activity, stability and life period was examined. The catalysts synthesized possess a high catalytic activity for the hydrogenation of methylacrylate.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1990年第6期638-642,共5页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
钯催化剂
聚乙烯吡啶
硅胶
加氢
Polyvinylpyridine, Palladium catalyst, Silica gel, Catalytic hydrogenation
