Exploiting basic principles to control the selectivity of the vapor phase catalytic oxidative cross-coupling of primary alcohols over nanoporous gold catalysts
Abstract
It is important to achieve high selectivity for high volume chemical synthesis in order to lower energy consumption through reduction in waste. Here, we report the selective synthesis of methyl esters—methyl acetate and methyl butyrate—through catalytic O2-assisted cross-coupling of methanol with ethanol or 1-butanol using activated, support-free nanoporous gold (npAu). Both well-controlled studies on ingots in UHV and experiments under ambient pressure catalytic conditions on both ingots and microspherical hollow shell catalysts reveal guiding principles for controlling selectivity. Under UHV conditions, the ester products of the cross-coupling of methanol with both ethanol and 1-butanol evolve near room temperature in temperature-programmed reaction studies, indicating that the reactions occur facilely. Furthermore, under steady-state catalytic operation, high stable activity was observed for cross-coupling in flowing gaseous reactant mixtures at atmospheric pressure and 423 K with negligible combustion. Optimum selectivity for cross-coupling is obtained in methanol-rich mixtures due to a combination of two factors: (1) the relative coverage of the respective alkoxys and (2) the relative facility of their β-H elimination. The relative coverage of the alkoxys is governed by van der Waal’s interactions between the alkyl groups and the surface; here, we demonstrate the importance of these weak interactions in a steady-state catalyticmore »
- Authors:
-
- Harvard Univ., Cambridge, MA (United States). Dept. of Chemistry and Chemical Biology
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nanoscale Synthesis and Characterization Lab.
- Harvard Univ., Cambridge, MA (United States). Dept. of Chemistry and Chemical Biology, School of Engineering and Applied Sciences
- Harvard Univ., Cambridge, MA (United States). School of Engineering and Applied Sciences
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Integrated Mesoscale Architectures for Sustainable Catalysis (IMASC)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1416498
- Alternate Identifier(s):
- OSTI ID: 1252811
- Report Number(s):
- LLNL-JRNL-737633
Journal ID: ISSN 0021-9517; TRN: US1800941
- Grant/Contract Number:
- AC52-07NA27344; SC0012573
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Catalysis
- Additional Journal Information:
- Journal Volume: 329; Journal Issue: C; Journal ID: ISSN 0021-9517
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; Nanoporous gold; Oxidation; Methyl ester synthesis; Selectivity; Reaction mechanism; Heterogeneous catalysis
Citation Formats
Wang, Lu-Cun, Stowers, Kara J., Zugic, Branko, Personick, Michelle L., Biener, Monika M., Biener, Juergen, Friend, Cynthia M., and Madix, Robert J. Exploiting basic principles to control the selectivity of the vapor phase catalytic oxidative cross-coupling of primary alcohols over nanoporous gold catalysts. United States: N. p., 2015.
Web. doi:10.1016/j.jcat.2015.04.022.
Wang, Lu-Cun, Stowers, Kara J., Zugic, Branko, Personick, Michelle L., Biener, Monika M., Biener, Juergen, Friend, Cynthia M., & Madix, Robert J. Exploiting basic principles to control the selectivity of the vapor phase catalytic oxidative cross-coupling of primary alcohols over nanoporous gold catalysts. United States. https://doi.org/10.1016/j.jcat.2015.04.022
Wang, Lu-Cun, Stowers, Kara J., Zugic, Branko, Personick, Michelle L., Biener, Monika M., Biener, Juergen, Friend, Cynthia M., and Madix, Robert J. Wed .
"Exploiting basic principles to control the selectivity of the vapor phase catalytic oxidative cross-coupling of primary alcohols over nanoporous gold catalysts". United States. https://doi.org/10.1016/j.jcat.2015.04.022. https://www.osti.gov/servlets/purl/1416498.
@article{osti_1416498,
title = {Exploiting basic principles to control the selectivity of the vapor phase catalytic oxidative cross-coupling of primary alcohols over nanoporous gold catalysts},
author = {Wang, Lu-Cun and Stowers, Kara J. and Zugic, Branko and Personick, Michelle L. and Biener, Monika M. and Biener, Juergen and Friend, Cynthia M. and Madix, Robert J.},
abstractNote = {It is important to achieve high selectivity for high volume chemical synthesis in order to lower energy consumption through reduction in waste. Here, we report the selective synthesis of methyl esters—methyl acetate and methyl butyrate—through catalytic O2-assisted cross-coupling of methanol with ethanol or 1-butanol using activated, support-free nanoporous gold (npAu). Both well-controlled studies on ingots in UHV and experiments under ambient pressure catalytic conditions on both ingots and microspherical hollow shell catalysts reveal guiding principles for controlling selectivity. Under UHV conditions, the ester products of the cross-coupling of methanol with both ethanol and 1-butanol evolve near room temperature in temperature-programmed reaction studies, indicating that the reactions occur facilely. Furthermore, under steady-state catalytic operation, high stable activity was observed for cross-coupling in flowing gaseous reactant mixtures at atmospheric pressure and 423 K with negligible combustion. Optimum selectivity for cross-coupling is obtained in methanol-rich mixtures due to a combination of two factors: (1) the relative coverage of the respective alkoxys and (2) the relative facility of their β-H elimination. The relative coverage of the alkoxys is governed by van der Waal’s interactions between the alkyl groups and the surface; here, we demonstrate the importance of these weak interactions in a steady-state catalytic process.},
doi = {10.1016/j.jcat.2015.04.022},
journal = {Journal of Catalysis},
number = C,
volume = 329,
place = {United States},
year = {Wed May 20 00:00:00 EDT 2015},
month = {Wed May 20 00:00:00 EDT 2015}
}
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