Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products

Allan R. E. Hansen; Kasper Enemark-Rasmussen; Frans A. A. Mulder; Pernille R. Jensen; Sebastian Meier

doi:10.1021/acs.jpcc.2c03448

Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products

Allan R. E. Hansen, Kasper Enemark-Rasmussen, Frans A. A. Mulder, Pernille R. Jensen, Sebastian Meier^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

6 Citations (Scopus)

Abstract

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 language	English
Journal	Journal of Physical Chemistry C
Volume	126
Issue	27
Pages (from-to)	11026-11032
Number of pages	7
ISSN	1932-7447
DOIs	https://doi.org/10.1021/acs.jpcc.2c03448
Publication status	Published - Jul 2022
Externally published	Yes

Keywords

ELECTROCHEMICAL REDUCTION
CONVERSION
POLARIZATION
RESOLUTION
MIXTURES
WATER
HSQC

Access to Document

10.1021/acs.jpcc.2c03448

Cite this

@article{d570e302d93244c5890045899ddbdeac,

title = "Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products",

abstract = "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.",

keywords = "ELECTROCHEMICAL REDUCTION, CONVERSION, POLARIZATION, RESOLUTION, MIXTURES, WATER, HSQC",

author = "Hansen, {Allan R. E.} and Kasper Enemark-Rasmussen and Mulder, {Frans A. A.} and Jensen, {Pernille R.} and Sebastian Meier",

year = "2022",

month = jul,

doi = "10.1021/acs.jpcc.2c03448",

language = "English",

volume = "126",

pages = "11026--11032",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "27",

}

Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products. / Hansen, Allan R. E.; Enemark-Rasmussen, Kasper; Mulder, Frans A. A. et al.
In: Journal of Physical Chemistry C, Vol. 126, No. 27, 07.2022, p. 11026-11032.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products

AU - Hansen, Allan R. E.

AU - Enemark-Rasmussen, Kasper

AU - Mulder, Frans A. A.

AU - Jensen, Pernille R.

AU - Meier, Sebastian

PY - 2022/7

Y1 - 2022/7

N2 - 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.

AB - 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.

KW - ELECTROCHEMICAL REDUCTION

KW - CONVERSION

KW - POLARIZATION

KW - RESOLUTION

KW - MIXTURES

KW - WATER

KW - HSQC

UR - https://pubs.acs.org/doi/pdf/10.1021/acs.jpcc.2c03448

U2 - 10.1021/acs.jpcc.2c03448

DO - 10.1021/acs.jpcc.2c03448

M3 - Journal article

SN - 1932-7447

VL - 126

SP - 11026

EP - 11032

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 27

ER -

Versatile Procedures for Reliable NMR Quantification of CO2 Electroreduction Products

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this