二氧化铈纳米催化剂可控合成及超微观构效关系研究

doi:10.19964/j.issn.1006-4990.2021-0628

Abstract

Abstract:

The transformation process of valence state of Cerium（Ce） is often accompanied by the storage and release of oxy-gen and the formation and migration of oxygen vacancies（O_v）,thus the CeO₂-based materials are widely used in automotive exhaust gas treatment,solid fuel cells,catalysis and other fields.The reversible valence transition of Ce ions（Ce⁴⁺⇌Ce³⁺） is the key to the excellent performance of CeO₂-based materials.Under the background of accelerating the realization of the“dual carbon”goal in today′s society in China,CeO₂ is bound to have broader prospects in the fields of energy and catalysis.Based on the concept of surface and interface catalysis,nanotechnology and spherical aberration correction transmission electron microscopy,many researchers have designed and synthesized the CeO₂ nanocatalysts with rational structure and excellent performance,and conducted the in-depth investigation of its atomic structure,ion valence state,chemical composition and other physicochemical properties in-depth from an ultramicroscopic perspective.Therefore,the latest research progress in the controllable synthesis,facet modification and growth,self-assembly,and functional doping of CeO₂ nanocatalysts was reviewd,and the relationship between atomic structure,chemical composition and physicochemical properties was discussed deeply,which was aiming at construction of the ultramicroscopic structure-activity relationship of functional nanocatalysts at the atomic scale and providing the reliable experimental data and powerful theoretical guidance for the design and synthesis of multi-component,multi-dimensional,high-performance CeO₂ nanocatalyst.

Key words: cerium oxides, nanocatalyst, controllable synthesis, structure-activity relationship, aberration-corrected transmission electron microscopy

CLC Number:

TQ133.3

HAO Xiaodong,FENG Xinyi,XU Yang,ZHANG Xishu,LIU Wen,HAO Fangyuan,MA Shufang,XU Bingshe. Study on controllable synthesis and ultramicroscopic structure-activity relationship of cerium oxides nanocatalysts[J]. Inorganic Chemicals Industry, 2022, 54(3): 7-17.

Figures/Tables 7

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Study on controllable synthesis and ultramicroscopic structure-activity relationship of cerium oxides nanocatalysts

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