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Redox-Sensitive Facet Dependency in Etching of Ceria Nanocrystals Directly Observed by Liquid Cell TEM

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Title
Redox-Sensitive Facet Dependency in Etching of Ceria Nanocrystals Directly Observed by Liquid Cell TEM
Author(s)
Jongbaek Sung; Back Kyu Choi; Byunghoon Kim; Byung Hyo Kim; Joodeok Kim; Donghoon Lee; Sungin Kim; Kisuk Kang; Taeghwan Hyeon; Jungwon Park
Publication Date
2019-11
Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.141, no.46, pp.18395 - 18399
Publisher
AMER CHEMICAL SOC
Abstract
Copyright © 2019 American Chemical Society.Defining the redox activity of different surface facets of ceria nanocrystals is important for designing an efficient catalyst. Especially in liquid-phase reactions, where surface interactions are complicated, direct investigation in a native environment is required to understand the facet-dependent redox properties. Using liquid cell TEM, we herein observed the etching of ceria-based nanocrystals under the control of redox-governing factors. Direct nanoscale observation reveals facet-dependent etching kinetics, thus identifying the specific facet ({100} for reduction and {111} for oxidation) that governs the overall etching under different chemical conditions. Under each redox condition, the contribution of the predominant facet increases as the etching reactivity increases
URI
https://pr.ibs.re.kr/handle/8788114/6809
ISSN
0002-7863
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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