钙钛矿氧化物催化剂的制备及其催化燃烧炭烟颗粒性能的研究进展

Research progress of the preparation of perovskite oxide catalysts and their catalytic performances for soot combustion

柴油机尾气中炭烟颗粒是城市雾霾的主要来源之一,严重污染环境和危害人体的健康,利用催化净化技术实现炭烟颗粒的消除是目前最有效的途径之一,其中高活性催化剂的研发是决定该技术广泛应用的关键因素之一.近年来,钙钛矿氧化物催化剂因具有高活性、低成本、高稳定性等优点,在炭烟颗粒催化燃烧中成为研究的热点.本文重点总结了近年来常用钙钛矿氧化物催化剂的制备方法,如溶胶-凝胶法、模板法、共沉淀法、水热合成法、固相合成法等,同时对在炭烟颗粒催化燃烧中具有高活性的钙钛矿氧化物催化剂,如Co基钙钛矿、Mn基钙钛矿、Fe基钙钛矿、Ti基钙钛矿等催化剂进行了详细的阐述,并对钙钛矿氧化物催化剂在催化柴油机炭烟颗粒燃烧的发展前景进行了展望.

Soot particles derived from the exhaust of diesel engines is one of the main sources of urban haze, which seriously pollute the environment and endanger people’s health. It is one of the most effective ways to eliminate soot particles by catalytic purification technology. In this way, the design and development of the catalysts with excellent performances is the most critical factor to determine whether this technology can be widely applied. Recently, perovskite oxide catalysts have been become a research hotspot in the catalytic combustion of soot particles due to the advantages of high activity, low costs and high stability. This review focuses on summarizing the preparation methods of perovskite oxide catalysts commonly used in recent years, such as sol-gel method, template method, coprecipitation method,hydrothermal synthesis method, and solid-state synthesis method. Meanwhile, perovskite catalysts with high activities for the soot catalytic combustion, such as Co-based perovskite, Mn-based perovskite, Fe-based perovskite, Ti-based perovskite, are also elaborated in detail. Moreover, the future research and development directions of perovskite oxide catalysts for the diesel soot catalytic combustion are prospected.