水滑石催化剂及其酸碱协同催化反应

Layered double hydroxides catalysts and their acid-base synergistic catalytic reactions

层状双金属氢氧化物是一类层状阴离子材料,因其金属阳离子的灵活可调性和层间阴离子的易交换性,使得该材料具有酸碱可调特性,在催化领域具有广泛应用前景。介绍水滑石类材料的结构特性,通过焙烧再水合、插层、掺杂、拓扑变换等多种方式改变其结构和组成,调节酸碱类型与强度,提高协同催化反应活性、选择性和稳定性。综述其在多相催化反应中作为酸碱位点的作用机理以及应用现状,展望水滑石酸碱协同催化反应的发展趋势。

Layered double hydroxides having flexible and adjustable metal cations and easy exchange of interlayer anions are a class of layered anion materials.The materials have acid-base adjustable properties and have a wide range of application prospects in the field of catalysis.This article introduces the structural characteristics of hydrotalcite materials.The structure and composition of hydrotalcite materials are changed by calcination and rehydration,intercalation,incorporation,topological transformation,etc.They can adjust the type and strength of acid and base,and improve the activity,selectivity,stability of the synergistic catalytic reaction.The mechanism and application status of their application as acid-base sites in heterogeneous catalytic reactions are reviewed.The development trends of layered double hydroxides acid-base synergistic catalytic reactions are prospected.