H<sub>8</sub>[PV<sub>5</sub>Mo<sub>7</sub>O<sub>40</sub>] – A Unique Polyoxometalate for Acid and RedOx Catalysis: Synthesis, Characterization, and Modern Applications in Green Chemical Processes
Jan‐Christian Raabe, Maximilian J. Poller, Dorothea Voß, Jakob Albert
Abstract
Abstract Polyoxometalates (POMs) are a fascinating group of anionic metal‐oxide clusters with a broad variety of structural properties and several catalytic applications, especially in the conversion of bio‐derived platform chemicals. H 8 [PV 5 Mo 7 O 40 ] (HPA‐5) is a unique POM catalyst that ideally links numerous fascinating research fields for the following reasons: a) HPA‐5 can be synthesized by rational design approaches; b) HPA‐5 can be well characterized using multiple analytical tools explaining its catalytic properties; and c) HPA‐5 is suitable for multiple important catalytic transformations of bio‐based feedstock. This Review combines the fields of synthesis, spectroscopic, electrochemical, and crystallographic characterization of HPA‐5 with those of sustainable catalysis and green chemistry. Selected catalytic applications include esterification, dehydration, and delignification of biomass as well as selective oxidation and fractionation of bio‐based feedstock. The unique HPA‐5 is a fascinating POM that has a broad application scope for biomass valorization.