Over the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they very strong Bronsted acidity, approaching region of a superacid, and second, are efficient oxidizers that exhibit rapid redox transformations under fairly mild conditions. Their structural mobility is also highlighted,...

Keggin-type heteropolyacid cesium salts have been regarded as potential candidates for heterogeneous catalytic reactions. This review describes the success of heteropolyacids (Cs-HPA salts) efficient catalysts in various synthesis processes. The Cs-HPA can be synthesized solid through metathesis a solution containing precursor HPA and another soluble Cs salt, which will give salt precipitate. A...

Fossil additives are a primary energy source and their contribution is around 80% in the world. Therefore, bioadditives that reduce impact each very important. This article discusses chemical transformation of glycerol to carbonate, ethers, esters, ketals, acetals, compounds with high technological applications, especially fuel sector as bioadditives. Mainly, heterogeneous catalysts important p...

Heteropolyacids and their salts comprise catalytic centers for the production of ethylene, one most important constituents in chemical industry. The paper emphasizes different synthesis routes hybrid materials consisting dodecatungstophosphoric acid silver salt (AgPW) ? zeolite—stepwise wet impregnation, silver-exchange zeolite, dry mixing precursors. Composite preparation procedures induced mi...