Tungsten Heteropolymetalate Salt refers to a salt compound formed by polyacid ions composed of twelve tungsten atoms and metal or non-metal ions. These polyacid salts have complex structures and various chemical properties. Among them, the most common is dodecungungstophosphate, that is, tungstate phosphate. Tungsten heteropoly salt contains [Xn+W12D40] salt (X is P, V, Nb, Ta, Cr, Mo, Si, etc.). The general chemical formula is [Xn+W12O40](8-n)—a series of dodecatungstic heteropolyacid anion structures. It is easy to form salt with Na+, NH4+, CS+, Ba2+ and other cations. There is a large space in the anion of dodecatungstic heteropolyacid, which can accommodate water molecules and cations, and the common ones are their salt compounds. It can be obtained by acidifying tungstate.
The cesium salt, lead salt and barium salt of dodecatungstic heteropoly acid are insoluble salts and are excellent cation exchangers. Also due to the stable and uniform structure in water or other solids, it shows good catalytic performance and is widely used as organic synthesis catalyst and dye precipitation agent. Dodecatungstate has many applications, including catalysts, electrochemical materials, optical materials, etc. They can be used as catalysts or catalyst precursors in chemical catalytic reactions with high catalytic activity and selectivity. In addition, they also have excellent electrochemical properties and have potential applications in the fields of batteries, electrolytic cells, and photoelectric conversion devices.
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