Substituent Effects in the Pyridinium Catalyzed Reduction of CO2 to Methanol: Further Mechanistic Insights
Abstract
A series of substituted pyridiniums were examined for their catalytic ability to electrochemically reduce carbon dioxide to methanol. It is found that in general increased basicity of the nitrogen of the amine and higher LUMO energy of the pyridinium correlate with enhanced carbon dioxide reduction. The highest faradaic yield for methanol production at a platinum electrode was 39 ± 4 % for 4-aminopyridine compared to 22 ± 2 % for pyridine. However, 4-tertbutyl and 4-dimethylamino pyridine showed decreased catalytic behavior, contrary to the enhanced activity associated with the increased basicity and LUMO energy, and suggesting that steric effects also play a significant role in the behavior of pyridinium electrocatalysts. As a result, mechanistic models for the the reaction of the pyridinium with carbon dioxide are considered.
- Authors:
-
- Princeton Univ., Princeton, NJ (United States); Monmouth Junction, NJ (United States)
- Princeton Univ., Princeton, NJ (United States)
- Princeton Univ., Princeton, NJ (United States); Georgian Court Univ., Lakewood, NJ (United States)
- Publication Date:
- Research Org.:
- Princeton Univ., NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences, and Biosciences Division
- Contributing Org.:
- Princeton University
- OSTI Identifier:
- 1418444
- Grant/Contract Number:
- SC0002133
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Topics in Catalysis
- Additional Journal Information:
- Journal Volume: 58; Journal Issue: 1; Journal ID: ISSN 1022-5528
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE; 14 SOLAR ENERGY; pyridinium catalyzed co2 reduction; co2 to methanol conversion; electrochemical co2 reduction; carbon-dioxide
Citation Formats
Barton Cole, Emily E., Baruch, Maor F., L’Esperance, Robert P., Kelly, Michael T., Lakkaraju, Prasad S., Zeitler, Elizabeth L., and Bocarsly, Andrew B. Substituent Effects in the Pyridinium Catalyzed Reduction of CO2 to Methanol: Further Mechanistic Insights. United States: N. p., 2014.
Web. doi:10.1007/S11244-014-0343-Z.
Barton Cole, Emily E., Baruch, Maor F., L’Esperance, Robert P., Kelly, Michael T., Lakkaraju, Prasad S., Zeitler, Elizabeth L., & Bocarsly, Andrew B. Substituent Effects in the Pyridinium Catalyzed Reduction of CO2 to Methanol: Further Mechanistic Insights. United States. https://doi.org/10.1007/S11244-014-0343-Z
Barton Cole, Emily E., Baruch, Maor F., L’Esperance, Robert P., Kelly, Michael T., Lakkaraju, Prasad S., Zeitler, Elizabeth L., and Bocarsly, Andrew B. Sat .
"Substituent Effects in the Pyridinium Catalyzed Reduction of CO2 to Methanol: Further Mechanistic Insights". United States. https://doi.org/10.1007/S11244-014-0343-Z. https://www.osti.gov/servlets/purl/1418444.
@article{osti_1418444,
title = {Substituent Effects in the Pyridinium Catalyzed Reduction of CO2 to Methanol: Further Mechanistic Insights},
author = {Barton Cole, Emily E. and Baruch, Maor F. and L’Esperance, Robert P. and Kelly, Michael T. and Lakkaraju, Prasad S. and Zeitler, Elizabeth L. and Bocarsly, Andrew B.},
abstractNote = {A series of substituted pyridiniums were examined for their catalytic ability to electrochemically reduce carbon dioxide to methanol. It is found that in general increased basicity of the nitrogen of the amine and higher LUMO energy of the pyridinium correlate with enhanced carbon dioxide reduction. The highest faradaic yield for methanol production at a platinum electrode was 39 ± 4 % for 4-aminopyridine compared to 22 ± 2 % for pyridine. However, 4-tertbutyl and 4-dimethylamino pyridine showed decreased catalytic behavior, contrary to the enhanced activity associated with the increased basicity and LUMO energy, and suggesting that steric effects also play a significant role in the behavior of pyridinium electrocatalysts. As a result, mechanistic models for the the reaction of the pyridinium with carbon dioxide are considered.},
doi = {10.1007/S11244-014-0343-Z},
journal = {Topics in Catalysis},
number = 1,
volume = 58,
place = {United States},
year = {Sat Nov 15 00:00:00 EST 2014},
month = {Sat Nov 15 00:00:00 EST 2014}
}
Web of Science
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