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Title: Remarkable NO oxidation on single supported platinum atoms

Abstract

Our first-principles density functional theoretical modeling suggests that NO oxidation is feasible on fully oxidized single θ-alumina-supported platinum atoms via a modified Langmuir-Hinshelwood pathway. This is in contrast to the known decrease in NO oxidation activity of supported platinum with decreasing Pt particle size believed to be due to increased platinum oxidation. In order to validate our theoretical study, we evaluated single θ-Al2O3-supported platinum atoms and found them to exhibit remarkable NO oxidation activity. A comparison of turnover frequencies (TOF) of single supported Pt atoms with those of platinum particles for NO oxidation shows that single supported Pt atoms are as active as fully formed platinum particles. The overall picture of NO oxidation on supported Pt is that NO oxidation activity decreases with decreasing Pt particle size but accelerates when Pt is present only as single atoms.

Authors:
 [1];  [1];  [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1185784
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal Issue: 11; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Narula, Chaitanya K., Allard, Lawrence F., Stocks, G. M., and Moses-DeBusk, Melanie. Remarkable NO oxidation on single supported platinum atoms. United States: N. p., 2014. Web. doi:10.1038/srep07238.
Narula, Chaitanya K., Allard, Lawrence F., Stocks, G. M., & Moses-DeBusk, Melanie. Remarkable NO oxidation on single supported platinum atoms. United States. https://doi.org/10.1038/srep07238
Narula, Chaitanya K., Allard, Lawrence F., Stocks, G. M., and Moses-DeBusk, Melanie. Fri . "Remarkable NO oxidation on single supported platinum atoms". United States. https://doi.org/10.1038/srep07238. https://www.osti.gov/servlets/purl/1185784.
@article{osti_1185784,
title = {Remarkable NO oxidation on single supported platinum atoms},
author = {Narula, Chaitanya K. and Allard, Lawrence F. and Stocks, G. M. and Moses-DeBusk, Melanie},
abstractNote = {Our first-principles density functional theoretical modeling suggests that NO oxidation is feasible on fully oxidized single θ-alumina-supported platinum atoms via a modified Langmuir-Hinshelwood pathway. This is in contrast to the known decrease in NO oxidation activity of supported platinum with decreasing Pt particle size believed to be due to increased platinum oxidation. In order to validate our theoretical study, we evaluated single θ-Al2O3-supported platinum atoms and found them to exhibit remarkable NO oxidation activity. A comparison of turnover frequencies (TOF) of single supported Pt atoms with those of platinum particles for NO oxidation shows that single supported Pt atoms are as active as fully formed platinum particles. The overall picture of NO oxidation on supported Pt is that NO oxidation activity decreases with decreasing Pt particle size but accelerates when Pt is present only as single atoms.},
doi = {10.1038/srep07238},
journal = {Scientific Reports},
number = 11,
volume = 4,
place = {United States},
year = {Fri Nov 28 00:00:00 EST 2014},
month = {Fri Nov 28 00:00:00 EST 2014}
}

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