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Title: Direct Visualization and Control of Atomic Mobility at {100} Surfaces of Ceria in the Environmental Transmission Electron Microscope

Abstract

We report that ceria is one of the world’s most prominent material for applications in heterogeneous catalysis, as catalyst support or catalyst itself. Despite an exhaustive literature on the structure of reactive facets of CeO 2 in line with its catalytic mechanisms, the temporal evolution of the atomic surface structure exposed to realistic redox conditions remains elusive. Here, we provide a direct visualization of the atomic mobility of cerium atoms on {100} surfaces of CeO 2 nanocubes at room temperature in high vacuum, O 2, and CO 2 atmospheres in an environmental transmission electron microscope. Lastly, through quantification of the cationic mobility, we demonstrate the control of the surface dynamics under exposure to O 2 and CO 2 atmospheres, providing opportunities for a better understanding of the intimate catalytic mechanisms.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [1]
  1. University of Lyon (France)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical Science Division, Center for Nanophase Materials Science
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Chemical Sciences, Geosciences & Biosciences Division
OSTI Identifier:
1468081
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 17; Journal Issue: 12; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; atomic mobility; CeO2 nanocubes; environmental transmission electron microscopy; facet; high resolution transmission electron microscopy; surface

Citation Formats

Bugnet, M., Overbury, Steven H., Wu, Zili L., and Epicier, T. Direct Visualization and Control of Atomic Mobility at {100} Surfaces of Ceria in the Environmental Transmission Electron Microscope. United States: N. p., 2017. Web. doi:10.1021/acs.nanolett.7b03680.
Bugnet, M., Overbury, Steven H., Wu, Zili L., & Epicier, T. Direct Visualization and Control of Atomic Mobility at {100} Surfaces of Ceria in the Environmental Transmission Electron Microscope. United States. https://doi.org/10.1021/acs.nanolett.7b03680
Bugnet, M., Overbury, Steven H., Wu, Zili L., and Epicier, T. Wed . "Direct Visualization and Control of Atomic Mobility at {100} Surfaces of Ceria in the Environmental Transmission Electron Microscope". United States. https://doi.org/10.1021/acs.nanolett.7b03680. https://www.osti.gov/servlets/purl/1468081.
@article{osti_1468081,
title = {Direct Visualization and Control of Atomic Mobility at {100} Surfaces of Ceria in the Environmental Transmission Electron Microscope},
author = {Bugnet, M. and Overbury, Steven H. and Wu, Zili L. and Epicier, T.},
abstractNote = {We report that ceria is one of the world’s most prominent material for applications in heterogeneous catalysis, as catalyst support or catalyst itself. Despite an exhaustive literature on the structure of reactive facets of CeO2 in line with its catalytic mechanisms, the temporal evolution of the atomic surface structure exposed to realistic redox conditions remains elusive. Here, we provide a direct visualization of the atomic mobility of cerium atoms on {100} surfaces of CeO2 nanocubes at room temperature in high vacuum, O2, and CO2 atmospheres in an environmental transmission electron microscope. Lastly, through quantification of the cationic mobility, we demonstrate the control of the surface dynamics under exposure to O2 and CO2 atmospheres, providing opportunities for a better understanding of the intimate catalytic mechanisms.},
doi = {10.1021/acs.nanolett.7b03680},
url = {https://www.osti.gov/biblio/1468081}, journal = {Nano Letters},
issn = {1530-6984},
number = 12,
volume = 17,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 7 works
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Works referencing / citing this record:

Approaches to Exploring Spatio-Temporal Surface Dynamics in Nanoparticles with In Situ Transmission Electron Microscopy
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An Open-Cell Environmental Transmission Electron Microscopy Technique for In Situ Characterization of Samples in Aqueous Liquid Solutions
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Shape-selective synthesis of nanoceria for degradation of paraoxon as a chemical warfare simulant
journal, January 2019


Quasi-degenerate states and their dynamics in oxygen deficient reducible metal oxides
journal, February 2020