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Sustainable catalytic oxidation of glycerol: a review

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Abstract

Valorization of biomass-derived feedstocks for the supply of high-value chemicals, clean fuel and electricity is gaining importance in the context of the circular economy. In particular, raw chemicals can be produced by electrocatalytic, photocatalytic and photoelectrochemical oxidation of glycerol, a by-product of biodiesel manufacturing. Nonetheless, controlling the selectivity of the oxidation of glycerol, a C3 compound, is challenging. Indeed, a wide range of C1 to C3 products containing carbonyl or carboxyl groups are produced, thus limiting the development of catalytic glycerol transformation. Here, we review electrooxidation, photooxidation and photoelectrooxidation of glycerol with emphasis on sustainability, and selectivity in catalytic systems. We also discuss co-electrolysis and fuel cells that present promising strategies involving glycerol oxidation.

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Abbreviations

HPLC:

High-performance liquid chromatography

TEMPO:

2,2,6,6-Tetramethylpiperidine-1-oxyl

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Acknowledgements

Xiaoyi Hu acknowledges the PhD scholarships from Monash University. Huanting Wang is the recipient of an Australian Research Council Australian Laureate Fellowship funded by the Australian Government (Project No.: FL200100049).

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XH and JL contributed equally to this manuscript. All authors took part in constructive discussions in writing the manuscript and final approval of it.

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Correspondence to Xiaoyi Hu or Xiwang Zhang.

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Hu, X., Lu, J., Liu, Y. et al. Sustainable catalytic oxidation of glycerol: a review. Environ Chem Lett 21, 2825–2861 (2023). https://doi.org/10.1007/s10311-023-01608-z

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  • DOI: https://doi.org/10.1007/s10311-023-01608-z

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