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Single-Atom Rh on High-Index CeO2 Facet for Highly Enhanced Catalytic CO Oxidation

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Title
Single-Atom Rh on High-Index CeO2 Facet for Highly Enhanced Catalytic CO Oxidation
Author(s)
Xu, Jing; Wang, Ying; Wang, Ke; Zhao, Meng; Zhang, Rui; Cui, Wenjie; Liu, Li; Megalamane S. Bootharaju; Jeong Hyun Kim; Taeghwan Hyeon; Zhang, Hongjie; Wang, Yu; Song, Shuyan; Wang, Xiao
Publication Date
2023-07
Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.62, no.28
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Reducible oxide-supported noble metal nanoparticles exhibit high activity in catalyzing many important oxidation reactions. However, atom migration under harsh reaction conditions leads to deactivation of the catalyst. Meanwhile, single-atom catalysts demonstrate enhanced stability, but often suffer from poor catalytic activity owing to the ionized surface states. In this work, we simultaneously address the poor activity and stability issues by synthesizing highly active and durable rhodium (Rh) single-atom catalysts through a "wrap-bake-peel" process. The pre-coated SiO2 layer during synthesis of catalyst plays a crucial role in not only protecting CeO2 support against sintering, but also donating electron to weaken the Ce-O bond, producing highly loaded Rh single atoms on the CeO2 support exposed with high-index {210} facets. Benefiting from the unique electronic structure of CeO2 {210} facets, more oxygen vacancies are generated along with the deposition of more electropositive Rh single atoms, leading to remarkably improved catalytic performance in CO oxidation.
URI
https://pr.ibs.re.kr/handle/8788114/14403
DOI
10.1002/anie.202302877
ISSN
1433-7851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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