Reversing Size-Dependent Trends in the Oxidation of Copper Clusters through Support Effects [Controlling the Degree of Oxidation of Copper Clusters Through Size and Support Effects]
- Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore (India)
- Shell India Markets Private Limited, Bangalore (India)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States); The Univ. of Chicago, Chicago, IL (United States)
Having the ability to tune the oxidation state of Cu nanoparticles is essential for their utility as catalysts. The degree of oxidation that maximizes product yield and selectivity is known to vary, depending on the particular reaction. Using first principles calculations and XANES measurements, we show that for sub-nanometer sizes in the gas phase, smaller Cu clusters are more resistant to oxidation. However, this trend is reversed upon deposition on an alumina support. We are able to explain this result in terms of strong cluster-support interactions, which differ significantly for the oxidized and elemental clusters. The stable cluster phases also feature novel oxygen stoichiometries. Finally, our results suggest that one can tune the degree of oxidation of Cu catalysts by optimizing not just their size, but also the support they are deposited on.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1459668
- Alternate ID(s):
- OSTI ID: 1414803
- Journal Information:
- European Journal of Inorganic Chemistry, Vol. 2018, Issue 1; ISSN 1434-1948
- Publisher:
- ChemPubSoc EuropeCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Perspective: Size selected clusters for catalysis and electrochemistry
|
journal | March 2018 |
The stability and oxidation of supported atomic-size Cu catalysts in reactive environments
|
journal | August 2019 |
Using first principles calculations to interpret XANES experiments: extracting the size-dependence of the ( p , T ) phase diagram of sub-nanometer Cu clusters in an O 2 environment
|
journal | February 2019 |
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