Polyoxometalates based compounds for green synthesis of aldehydes and ketones

Molecular oxygen within Polyoxometalates (POMs) based compounds are ideal oxidants with high atom economy and its use results in the production of water as the only byproduct. Significant progress has been made in the development of catalytic methods for aerobic alcohol oxidation to have aldehydes and ketones with POMs based compounds. They are alternative to the use of traditional hypervalent iodine catalyst systems which are with molecular oxygen as a terminal oxidant. Further, POMs based catalysts can be applied to catalytic reactions with different modes of energization such as thermocatalysis, photocatalysis and electrocatalysis. This review summarizes the frontier advances in polyoxometalates for catalytic alcohol selective oxidation in thermocatalytic, electrocatalytic, and photocatalytic applications. The three advantages of POM catalysts in terms of performance, economy, and environmental protection are highlighted. These include the use of sol-gel and electrostatic assembly methods to increase the reaction surface area, reduce the use of precious metals, and improve the stability of POMs catalysts. The field of selective alcohol oxidation is advanced. Finally, the challenges of preparing more efficient and green catalysts are presented. & COPY; 2023 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

Automated summary

This article summarizes the advances in the application of molecular oxygen oxidants within Polyoxometalates (POMs) based compounds in catalytic alcohol selective oxidation. POMs based catalysts can efficiently and economically convert alcohols to aldehydes and ketones through different energy chemical reaction modes such as thermocatalysis, photocatalysis, and electrocatalysis. The three advantages of POM catalysts in terms of performance, economy, and environmental protection are highlighted, along with methods to increase reaction surface area, reduce the use of precious metals, and improve catalyst stability.