抗烧结型金属纳米催化剂的制备策略  

Preparation strategies for sinter-resistant metal-nanoparticle-based catalysts

作　　者：李淑贞 张桂臻[1] 杨晓栋 张龙[1] 陈戈[1] 邱文革[1] 何洪[1] Li Shuzhen;Zhang Guizhen;Yang Xiaodong;Zhang Long;Chen Ge;Qiu Wenge;He Hong(Beijing Key Laboratory for Green Catalysis and Separation,Faculty of Environment and Life,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学环境与生命学部,绿色催化与分离北京市重点实验室,北京100124

出　　处：《工业催化》2023年第7期1-14,共14页Industrial Catalysis

基　　金：国家自然科学基金(22035009)资助项目;移动源污染排放控制技术国家工程实验室开放基金(NELMS2019A04)。

摘　　要：负载型金属纳米粒子催化剂被广泛应用于化工工业生产中,但由于金属在高温环境中容易烧结而导致催化剂失活,因此提高催化剂的高温热稳定性是多相催化领域的重大挑战。本文概述了金属纳米颗粒的高温烧结机制:纳米粒子迁移-聚集过程(PMC)和Ostwald熟化(OR),讨论了近年来通过增强金属-载体相互作用、调节金属纳米粒子与包裹层之间的界面效应、构建多功能结构等方法在制备抗烧结型金属纳米催化剂方面的研究进展并对其进行总结。Supported metal nanoparticles are widely used as catalysts in the chemical industrial,but still suffer from deactivation because of metals sintering at high temperature.Therefore,improving the high temperature thermal stability of catalysts is a major challenge in the field of heterogeneous catalysis.This paper briefly reviews the sinter mechanisms of metal nanoparticles,such as particle migration and coalescence(PMC)and Ostwald ripening(OR).Furthermore,the recent research progress on preparing sinter-resistant metal-nanoparticle catalysts via strengthening metal-support interactions,adjusting the interface effect between metal nanoparticles and coatings,and constructing multi-functional structures are discussed and summarized.

关 键 词：催化剂工程 金属纳米粒子 烧结 高温热稳定性 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]