环丁烯砜加氢新型催化剂的研究 Ι.金属诱导化学镀法制备NiB非晶态合金催化剂

采用金属诱导化学镀法制备了纯态N iB非晶态合金催化剂和N iB(Ag)/M gO,N iB/M gO负载型非晶态合金催化剂。用X射线衍射、电感耦合等离子体发射光谱和透射电镜等方法对催化剂进行了表征,并将其应用于环丁烯砜加氢反应中。实验结果表明,负载后N iB粒径明显减小。在N iB(Ag)/M gO催化剂中,N iB为辐射状球形或半球形颗粒,粒径在30~50nm之间。由于Ag的催化、定向作用,使N iB(Ag)/M gO催化剂中的N iB集簇粒子高度分散。与Raney N i,N iB,N iB/M gO催化剂相比,N iB(Ag)/M gO催化剂表现出更好的催化活性,在环丁烯砜加氢反应中,环丁烯砜的转化率可达99.7%。

Novel Catalyst for Hydrogenation of SulfoleneΙ.Preparation of Amorphous NiB Alloy Catalyst on MgO Support by Metal Inducing Chemical Plating

Amorphous NiB alloy was prepared by nickel chemical plating,and supported amorphous NiB catalysts were prepared by silver-inducing and heat-inducing nickel chemical plating,namely NiB(Ag)/MgO and NiB/MgO respectively.These catalysts were characterized by means of ICP,XRD and TEM.The activities of catalysts were evaluated by sulfolene hydrogenation.The amorphous NiB particles prepared by silver-inducing nickel chemical plating were in forms of spheroid or hemispheroid with average size ranging from 30～50nm.Because of catalyzing and inducting of silver,NiB cluster particles of NiB(Ag)/MgO catalyst were highly dispersed.Conversion of sulfolene in hydrogenation on NiB(Ag)/MgO catalyst mounted to 99.7% which was better than NiB and NiB/MgO catalyst,and approached Raney Ni catalyst,despite its much lower Ni content.