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Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products

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DOI

  • Allan R. E. Hansen, Technical University of Denmark
  • ,
  • Kasper Enemark-Rasmussen, Technical University of Denmark
  • ,
  • Frans A. A. Mulder
  • Pernille R. Jensen, Technical University of Denmark
  • ,
  • Sebastian Meier, Technical University of Denmark

Electrochemical reduction can capture and utilize CO2 through its conversion to small chemicals and fuels. Analytical standard operating procedures for the accurate quantification of short-chain acids, aldehydes, and alcohols by high-performance liquid chromatography (HPLC), gas chromatography-mass spectrometry (GC-MS), or NMR are not well established. Electrochemical reduction of CO2 produces the smallest conceivable organic compounds, which necessitates slow NMR quantifications due to slow T-1 relaxation toward equilibrium magnetization. It is shown that the use of paramagnetic contrast agents or cooling of water/DMSO provides T-1-optimized measurements with attractive sensitivity and speed. H-1 NMR experiments that are widely used in the study of biological mixtures are found unsuitable for quantitative analyses of T-1-optimized samples.

Original languageEnglish
JournalJournal of Physical Chemistry C
Volume126
Issue27
Pages (from-to)11026-11032
Number of pages7
ISSN1932-7447
DOIs
Publication statusPublished - Jul 2022
Externally publishedYes

    Research areas

  • ELECTROCHEMICAL REDUCTION, CONVERSION, POLARIZATION, RESOLUTION, MIXTURES, WATER, HSQC

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