纳米氧化铈的缺陷化学及其在多相催化中作用的研究进展

纳米氧化铈由于其独特的晶体结构和可逆的+3/+4变价能力而有着丰富的晶体缺陷,使其具有优良的储放氧能力,对很多反应都有着很好的催化作用。首先从列举纳米氧化铈的缺陷种类出发,介绍缺陷的引入方法及表征手段,接着从热催化、电催化、光催化三个方面选取一些重要的反应,对氧化铈的缺陷化学及其在多相催化中对催化反应性的调控机制进行总结,旨在通过梳理氧化铈的缺陷化学在多相催化中的作用来为设计更高效的催化剂提供借鉴意义,最后对氧化铈缺陷化学研究中存在的问题和未来的研究方向进行了展望。

Defect Chemistry of Ceria Nanostructures and Their Applications in Heterogeneous Catalysis

Ceria nanostructures have abundant crystal defects due to its special structure and reversible conversion between Ce^3+ and Ce^4+, thus they have excellent oxygen storage/release capability and catalytic properties for many reactions. In this review, the kinds of defects in ceria nanostructures were outlined at the beginning, then the introduction methods and characterization technologies of the defects in ceria were introduced, after which the research progress of nanoceria defects applied in heterogeneous catalysis including thermocatalysis, electrocatalysis, and photocatalysis were summarized. This review was aimed at designing catalyst with higher performance through summing up the applications of the nanoceria defect chemistry in heterogeneous catalysis. Finally, the perspective on the problems and future trends for the research of nanoceria defect chemistry is proposed.