Ensemble versus Local Restructuring of Core‐shell Nickel–Cobalt Nanoparticles upon Oxidation and Reduction Cycles
Abstract
Abstract Bimetallic nanoparticles are widely studied, for example in catalysis. However, possible restructuring in the environment of use, such as segregation or alloying, may occur. Taken individually, state‐of‐the‐art analytical tools fail to give an overall picture of these transformations. This study combines an ensemble analysis (near‐ambient‐pressure X‐ray photoelectron spectroscopy) with a local analysis (environmental transmission electron microscopy) to provide an in situ description of the restructuring of core–shell nickel‐cobalt nanoparticles exposed to cycles of reduction and oxidation. It reveals a partial surface alloying accompanied by fragmentation of the shell into smaller clusters, which is not reversible. Beyond this case study, the methodology proposed here should be applicable in a broad range of studies dealing with the reactivity of mono‐ or bi‐metallic metal nanoparticles.
- Authors:
-
[1];
- Sorbonne Université, CNRS, Collège de France Laboratoire de Chimie de la Matière Condensée de Paris 4 Place Jussieu 75252 Paris France
- Department of Chemical and Petroleum Engineering University of Pittsburgh 4200 Fifth Avenue Pittsburgh Pennsylvania 15260 USA, E.A. Fischione Instruments Inc. 9003 Corporate Circle Export PA 15632 USA
- Department of Chemical and Petroleum Engineering University of Pittsburgh 4200 Fifth Avenue Pittsburgh Pennsylvania 15260 USA, Department of Physics University of Pittsburgh 4200 Fifth Avenue Pittsburgh Pennsylvania 15260 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1461591
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Chemistry - A European Journal
- Additional Journal Information:
- Journal Name: Chemistry - A European Journal Journal Volume: 24 Journal Issue: 46; Journal ID: ISSN 0947-6539
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Carenco, Sophie, Bonifacio, Cecile S., and Yang, Judith C. Ensemble versus Local Restructuring of Core‐shell Nickel–Cobalt Nanoparticles upon Oxidation and Reduction Cycles. Germany: N. p., 2018.
Web. doi:10.1002/chem.201802764.
Carenco, Sophie, Bonifacio, Cecile S., & Yang, Judith C. Ensemble versus Local Restructuring of Core‐shell Nickel–Cobalt Nanoparticles upon Oxidation and Reduction Cycles. Germany. https://doi.org/10.1002/chem.201802764
Carenco, Sophie, Bonifacio, Cecile S., and Yang, Judith C. Wed .
"Ensemble versus Local Restructuring of Core‐shell Nickel–Cobalt Nanoparticles upon Oxidation and Reduction Cycles". Germany. https://doi.org/10.1002/chem.201802764.
@article{osti_1461591,
title = {Ensemble versus Local Restructuring of Core‐shell Nickel–Cobalt Nanoparticles upon Oxidation and Reduction Cycles},
author = {Carenco, Sophie and Bonifacio, Cecile S. and Yang, Judith C.},
abstractNote = {Abstract Bimetallic nanoparticles are widely studied, for example in catalysis. However, possible restructuring in the environment of use, such as segregation or alloying, may occur. Taken individually, state‐of‐the‐art analytical tools fail to give an overall picture of these transformations. This study combines an ensemble analysis (near‐ambient‐pressure X‐ray photoelectron spectroscopy) with a local analysis (environmental transmission electron microscopy) to provide an in situ description of the restructuring of core–shell nickel‐cobalt nanoparticles exposed to cycles of reduction and oxidation. It reveals a partial surface alloying accompanied by fragmentation of the shell into smaller clusters, which is not reversible. Beyond this case study, the methodology proposed here should be applicable in a broad range of studies dealing with the reactivity of mono‐ or bi‐metallic metal nanoparticles.},
doi = {10.1002/chem.201802764},
journal = {Chemistry - A European Journal},
number = 46,
volume = 24,
place = {Germany},
year = {Wed Jul 25 00:00:00 EDT 2018},
month = {Wed Jul 25 00:00:00 EDT 2018}
}
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