Surfactant-assisted synthesis of mesoporous hafnium- imidazoledicarboxylic acid hybrids for highly efficient hydrogen transfer of biomass-derived carboxides
作者:Fanglin Dai、Shenghui Zhou、Xingzhen Qin、Detao Liu、Haisong Qi
DOI:10.1016/j.mcat.2019.110611
日期:2019.12
Catalytic transfer hydrogenations of biomass-derived carbonyl compounds to produce corresponding alcohols are important pathway for biomass transformation. Herein, a facile route was developed to synthesize the surfactant-assisted heterogeneous acid-base bifunctional 4,5-imidazoledicarboxylic acid-hafnium hybrid catalyst (Hf-H3IDC-T) by hydrothermal self-assembly method. The as-prepared Hf-H3IDC-T
生物质衍生的羰基化合物的催化转移氢化以生产相应的醇是生物质转化的重要途径。在此,开发了通过水热自组装法合成表面活性剂辅助的多相酸基双官能4,5-咪唑二甲酸-杂化催化剂(Hf-H 3 IDC-T)的简便方法。制备的Hf-H 3 IDC-T的特征在于SEM和TEM,FT-IR光谱,N 2吸附-解吸,X射线衍射图谱(XRD),X射线光电子能谱(XPS),热重分析( TG),NH 3 / CO 2 -TPD,NMR,GC MS,ICP-OES和元素分析。高频3IDC-T杂种具有中孔结构和酸碱偶合位点。在温和条件下,使用2-丙醇作为氢气源,通过Hf-H 3 IDC-T从糠醛(FUR)获得定量产率(99.2%)的糠醇(FFA)。发现咪唑环上的氨基有利于增强催化剂的碱位。同时,添加十六烷基三甲基溴化铵(CTAB)作为模板剂可以提高催化剂的比表面积。动态分析表明,FUR还原的表观活化能低至50.89 kJ