In‐Situ Investigations of Polyoxometalate‐Catalysed Biomass Oxidation to Formic Acid by Using Multinuclear High Resolution Flow NMR Spectroscopy

Biomass valorisation over polyoxometalate‐based (POM) catalysts is a promising strategy for green and sustainable chemistry. In order to further improve such processes e. g. by using different additives, a better understanding of the chemical influence of various additives on the catalyst is paramou...

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Bibliographic Details
Published in:ChemCatChem 2024-08, Vol.16 (16), p.n/a
Main Authors: Krueger, Jan‐Dominik H., Poller, Maximilian J., Lyall, Catherine, Lowe, John, Hintermair, Ulrich, Albert, Jakob
Format: Article
Language:English
Subjects:
Additives
Biomass
Biomass oxidation
Carbohydrates
Catalysts
Esters
FlowNMR spectroscopy
Formic acid
in-situ investigations
NMR spectroscopy
Oxidation
polyoxometalate
Polyoxometallates
Reaction kinetics
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Summary:Biomass valorisation over polyoxometalate‐based (POM) catalysts is a promising strategy for green and sustainable chemistry. In order to further improve such processes e. g. by using different additives, a better understanding of the chemical influence of various additives on the catalyst is paramount. The main objective of this study is to gain a deeper understanding of the effects caused by various additives on the catalytically active vanadium species in the selective aerobic oxidation of carbohydrates to formic acid (esters). After carefully choosing a suitable model system, the oxidation of glycolaldehyde using the heteropolyacid H5PV2Mo10O40 (HPA‐2) as a catalyst was studied in situ by Flow Nuclear magnetic resonance (FlowNMR) spectroscopy. These measurements allowed to identify the catalytically active isomer of the HPA‐2‐catalyst and to observe the influence of additives on the reaction kinetics in situ. These findings provide a good basis for further improving POM‐based catalytic aerobic oxidation of biomass. This study explores the aqueous oxidation of Glycolaldehyde to Formic Acid catalysed by H5PV2Mo10O40 in aqueous and aqueous‐methanolic solution gaining deep mechanistical insights using Multinuclear high‐resolution Flow NMR spectroscopy.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.202400402