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Title: Ligand Insertion in MOF-74 as Effective Design for Oxidation of Ethane to Ethanol

Abstract

We report that efficient conversion of ethane into valuable materials is important with the availability of new natural gas resources. Recently, metal–organic frameworks (MOFs) with open iron sites (i.e., Fe0.1Mg1.9-MOF-74) have been shown to be promising material for catalyzing ethane to ethanol. In this computational study, various size-matching ligands are inserted into the Fe0.1Mg1.9-MOF-74 structure to further optimize this reaction. Our density functional theory calculations show that the presence of ligands enhances the binding affinity of the oxygen atoms of N2O to the iron atoms in the framework, thereby leading to an improvement in the oxidizing process. Furthermore, the reaction pathways for the new structures show reduced enthalpy barrier in the rate-determining step in the oxidation of ethane reaction cycle compared to the original Fe0.1Mg1.9-MOF-74. In conclusion, these findings provide ways in which the performance of the Fe0.1Mg1.9-MOF-74 can be optimized for next-generation catalysts.

Authors:
ORCiD logo [1];  [1]
  1. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1543654
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 122; Journal Issue: 40; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE

Citation Formats

Suh, Bong Lim, and Kim, Jihan. Ligand Insertion in MOF-74 as Effective Design for Oxidation of Ethane to Ethanol. United States: N. p., 2018. Web. doi:10.1021/acs.jpcc.8b07857.
Suh, Bong Lim, & Kim, Jihan. Ligand Insertion in MOF-74 as Effective Design for Oxidation of Ethane to Ethanol. United States. https://doi.org/10.1021/acs.jpcc.8b07857
Suh, Bong Lim, and Kim, Jihan. Mon . "Ligand Insertion in MOF-74 as Effective Design for Oxidation of Ethane to Ethanol". United States. https://doi.org/10.1021/acs.jpcc.8b07857. https://www.osti.gov/servlets/purl/1543654.
@article{osti_1543654,
title = {Ligand Insertion in MOF-74 as Effective Design for Oxidation of Ethane to Ethanol},
author = {Suh, Bong Lim and Kim, Jihan},
abstractNote = {We report that efficient conversion of ethane into valuable materials is important with the availability of new natural gas resources. Recently, metal–organic frameworks (MOFs) with open iron sites (i.e., Fe0.1Mg1.9-MOF-74) have been shown to be promising material for catalyzing ethane to ethanol. In this computational study, various size-matching ligands are inserted into the Fe0.1Mg1.9-MOF-74 structure to further optimize this reaction. Our density functional theory calculations show that the presence of ligands enhances the binding affinity of the oxygen atoms of N2O to the iron atoms in the framework, thereby leading to an improvement in the oxidizing process. Furthermore, the reaction pathways for the new structures show reduced enthalpy barrier in the rate-determining step in the oxidation of ethane reaction cycle compared to the original Fe0.1Mg1.9-MOF-74. In conclusion, these findings provide ways in which the performance of the Fe0.1Mg1.9-MOF-74 can be optimized for next-generation catalysts.},
doi = {10.1021/acs.jpcc.8b07857},
journal = {Journal of Physical Chemistry. C},
number = 40,
volume = 122,
place = {United States},
year = {Mon Sep 24 00:00:00 EDT 2018},
month = {Mon Sep 24 00:00:00 EDT 2018}
}

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