钙钛矿氧化物催化氧化VOCs的研究进展

Recent Advances in Catalytic Oxidation of VOCs Using Perovskite Oxide

钙钛矿氧化物(ABO3)催化剂具有高活性和热稳定性,以及可调节的元素组成和可调控的氧化还原性质,使其性能得到改善,因此是VOCs催化氧化领域最具竞争力的材料之一。尽管ABO3催化剂具有广泛的应用潜力,但其使用受到失活和烧结敏感性的限制,这可能会影响其长期性能,从而限制其在工业中的使用。本文从非掺杂、掺杂(A位点、B位点和A/B位点掺杂)和负载型ABO3三个方面总结了当前研究的相关进展。与非掺杂ABO3氧化物相比,掺杂型催化剂表现出更高的活性和稳定性。此外,本文提出了ABO3氧化物催化氧化VOCs存在的三种机理。最后,对ABO3催化剂催化VOCs燃烧的问题及展望进行了探讨,为进一步设计新型高效低温催化剂提供了思路。Perovskite oxide (ABO3) catalysts are among the most competitive substances in the domain of volatile organic compounds (VOCs) catalytic oxidation because of their high activity, thermal stability, adjustable elemental composition and flexible structure. Despite the broad range of potential applications of ABO3 catalysts, their utilization is constrained by inactivation and sintering susceptibility, which could impact their long-term performance and thereby limit their application in industry. In this article, the contemporary research progress is summarized from three aspects: non-doping, doping (doping at A site, B site and A/B site) and supported ABO3. Compared with undoped ABO3 oxides, doped catalysts demonstrated higher activity and stability. Three mechanisms of VOCs catalytic oxidation were put forward. Ultimately, the problems and prospects of VOCs combustion catalyzed by ABO3 catalysts were discussed, which provided insights for the further design of new high-efficiency and low-temperature catalysts.