金属有机骨架高温自还原制备高性能等级孔碳负载Co基催化剂

以钴基金属有机框架为前驱体,利用一步高温碳化自还原法,通过精确调控碳化过程,实现等级孔道结构及钴纳米颗粒分散性的可控调节,制备出高催化活性及产物选择性的等级孔碳负载Co基催化剂.研究发现,600℃碳化后的催化剂为具有高比表面积的等级孔道结构和高分散的钴纳米颗粒,在选择性催化1,3-丁二烯加氢反应中,丁二烯完全转化温度低至60℃,对应丁烯的选择性高达61%,实现了低温高选择性催化加氢.

Self-reduction for the Synthesis of Co Supported on Hierarchically Porous Carbon for Selective Hydrogenation Reaction

A series of supported cobalt-based nanocatalysts were synthesized by a one-step self-reduction method using cobalt-based organic framework as precursor.The effect of self-reduction of carbonization on the catalytic performance of supported cobalt-based catalysts was studied.This method successfully controlled the hierarchically porous structure of supports and the size of cobalt nanoparticles.The prepared Co-based catalysts had high catalytic activity and product selectivity for selective hydrogenation of 1,3-butadiene.Specially,it was found that the catalyst carbonized at 600℃contained a hierarchically porous structure with large surface area,and a uniform distribution of cobalt nanoparticles without obvious aggregation.Most importantly,the corresponding sample exhibited a rather low 100%conversion temperature at 60℃for selective hydrogenation of 1,3-butadiene,but with butenes selectivity as high as 61%.This work provides a new strategy for the preparation of supported non-noble metal catalysts with high-performance for hydrogenation reactions.