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- Title
Single‐Atom Rh on High‐Index CeO<sub>2</sub> Facet for Highly Enhanced Catalytic CO Oxidation.
- Authors
Xu, Jing; Wang, Ying; Wang, Ke; Zhao, Meng; Zhang, Rui; Cui, Wenjie; Liu, Li; Bootharaju, Megalamane S.; Kim, Jeong Hyun; Hyeon, Taeghwan; Zhang, Hongjie; Wang, Yu; Song, Shuyan; Wang, Xiao
- 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.
- Subjects
CATALYTIC oxidation; METAL nanoparticles; PRECIOUS metals; CATALYST poisoning; CATALYTIC activity
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 28, p1
- ISSN
0044-8249
- Publication type
Academic Journal
- DOI
10.1002/ange.202302877