Polyoxometalate-based metal–organic frameworks for heterogeneous catalysis

Abstract

Polyoxometalate-based metal–organic frameworks (POM-based MOFs) are extended structures that simultaneously possess the virtues of POMs and MOFs. They have been attracting immense attention because of their diverse architectures and charming topologies, and also due to their probable application prospects in the areas of catalysis, sorption and separation, magnetism, proton conduction, lithium-ion batteries, supercapacitors, electrochemistry, medicine, and so on. In particular, the strong acidity, multielectron redox and photoactivity of POMs combined with the high surface area and adjustable pore size of MOFs make them excellent heterogeneous catalysts in various kinds of organic reactions. This short review firstly presents a concise introduction related to POMs, MOFs and POM-based MOFs, followed by the synthetic strategies of POM-based MOFs. The structural features and catalysis properties of representative POM-based MOFs have been classified and summarized according to different catalytic reactions, including acidity, oxidation, photocatalysis, electrocatalysis and other types of catalysis. The challenges present research situations, and prospects for the preparation and catalytic properties of POM-based MOFs are discussed.