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Title: Sequestration and selective oxidation of carbon monoxide on graphene edges

Abstract

The versatility of carbon nanostructures makes them attractive as possible catalytic materials, as they can be synthesized in various shapes and chemically modified by doping, functionalization, and the creation of defects in the nanostructure. Recent research has shown how the properties of carbon nanostructures can be exploited to enhance the yield of chemical reactions such as the thermal decomposition of water (Kostov et al 2005 Phys. Rev. Lett. 95) and the dissociation of methane into carbon and hydrogen (Huang et al 2008 J. Chem. Phys. at press). In this work, we consider the carbon-mediated partial sequestration and selective oxidation of carbon monoxide (CO), both in the presence and absence of hydrogen. Using first-principles calculations we study several reactions of CO with carbon nanostructures, where the active sites can be regenerated by the deposition of carbon decomposed from the reactant (CO) to make the reactions self-sustained. Using statistical mechanics, we also study the conditions under which the conversion of CO to graphene and carbon dioxide is thermodynamically favorable, both in the presence and in the absence of hydrogen. These results are a first step toward the development of processes for the carbon-mediated partial sequestration and selective oxidation of CO in amore » hydrogen atmosphere.« less

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1564660
Resource Type:
Journal Article
Journal Name:
Journal of Physics. Condensed Matter
Additional Journal Information:
Journal Volume: 21; Journal Issue: 35; Journal ID: ISSN 0953-8984
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
Physics

Citation Formats

Paul, Sujata, Santiso, Erik E., and Buongiorno Nardelli, Marco. Sequestration and selective oxidation of carbon monoxide on graphene edges. United States: N. p., 2009. Web. doi:10.1088/0953-8984/21/35/355008.
Paul, Sujata, Santiso, Erik E., & Buongiorno Nardelli, Marco. Sequestration and selective oxidation of carbon monoxide on graphene edges. United States. doi:10.1088/0953-8984/21/35/355008.
Paul, Sujata, Santiso, Erik E., and Buongiorno Nardelli, Marco. Fri . "Sequestration and selective oxidation of carbon monoxide on graphene edges". United States. doi:10.1088/0953-8984/21/35/355008.
@article{osti_1564660,
title = {Sequestration and selective oxidation of carbon monoxide on graphene edges},
author = {Paul, Sujata and Santiso, Erik E. and Buongiorno Nardelli, Marco},
abstractNote = {The versatility of carbon nanostructures makes them attractive as possible catalytic materials, as they can be synthesized in various shapes and chemically modified by doping, functionalization, and the creation of defects in the nanostructure. Recent research has shown how the properties of carbon nanostructures can be exploited to enhance the yield of chemical reactions such as the thermal decomposition of water (Kostov et al 2005 Phys. Rev. Lett. 95) and the dissociation of methane into carbon and hydrogen (Huang et al 2008 J. Chem. Phys. at press). In this work, we consider the carbon-mediated partial sequestration and selective oxidation of carbon monoxide (CO), both in the presence and absence of hydrogen. Using first-principles calculations we study several reactions of CO with carbon nanostructures, where the active sites can be regenerated by the deposition of carbon decomposed from the reactant (CO) to make the reactions self-sustained. Using statistical mechanics, we also study the conditions under which the conversion of CO to graphene and carbon dioxide is thermodynamically favorable, both in the presence and in the absence of hydrogen. These results are a first step toward the development of processes for the carbon-mediated partial sequestration and selective oxidation of CO in a hydrogen atmosphere.},
doi = {10.1088/0953-8984/21/35/355008},
journal = {Journal of Physics. Condensed Matter},
issn = {0953-8984},
number = 35,
volume = 21,
place = {United States},
year = {2009},
month = {8}
}

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