铈基催化剂表面界面调控及其小分子污染物催化净化性能研究进展

Research progress on surface interface regulation of cerium based catalysts and its catalytic oxidation performance for small molecules pollutants

二氧化铈(CeO_(2))具有优异的储氧释氧性能、氧迁移率和丰富的表面缺陷,易形成金属-载体强相互作用稳定贵金属粒子,以其作为活性组分和载体的催化剂在环境污染物氧化消除中被广泛应用。单一CeO_(2)的催化活性和热稳定性较差,常利用负载、掺杂和复合等方法对表界面性质和微观结构进行调控以改善其催化性能和热稳定性。对近年来铈基催化剂的表界面调控策略和催化机理进行综述,重点分析界面效应和离子间协同作用对小分子污染物催化氧化性能的影响。

Cerium dioxide(CeO_(2))has excellent oxygen storage and release properties,oxygen mobility and abundant surface defects,and is easy to form metal-carrier strong interaction to stabilize precious metal particles.As an active component and carrier catalyst,CeO_(2) is widely used in the oxidation elimination of environmental pollutants.Single CeO_(2) has poor catalytic activity and thermal stability.Loading,doping and composite methods are often used to regulate the surface interface properties and microstructure to improve its catalytic performance and thermal stability.In this paper,the surface interface regulation strategies and catalytic mechanisms of cerium based catalysts in recent years were reviewed,and the effects of interface effects and interionic synergies on catalytic oxidation of small molecular pollutants were analyzed.