Weakley polyacid compound containing mixed cations, and preparation method and application thereof

Abstract

The invention discloses a Weakley polyacid compound containing mixed cations, and a preparation method and an application thereof, and belongs to the technical filed of synthesis of Weakley polyacid compounds. The molecular formula of the Weakley polyacid compound containing mixed cations is Na5H[N(CH3)4]2[Co(C3N2H4)2(H2O)4][Co4(H2O)2(PW9O34)2].21H2O, and is composed of one Weakley polyanion [Co4(H2O)2(PW9O34)2]<10->, five Na<+>, two [N(CH3)4]<+>, one [Co(C3N2H4)2(H2O)4]<2+>, one H<+> and 21 crystal waters, wherein the crystal waters, coordination water of the [Co(C3N2H4)2(H2O)4]<2+> and oxygen in the Weakley polyanion [Co4(H2O)2(PW9O34)2]<10-> form a three dimensional hydrogen bond network through hydrogen bonds. The invention also discloses the preparation method of the Weakley polyacid compound containing mixed cations, and the application of the Weakley polyacid compound in the preparation of proton conductors. The Weakley polyacid compound containing the mixed cations has high proton conducting ability, and has a proton conductivity at room temperature of 5.03*10<-4>S.cm<-1>, so the Weakley polyacid compound containing the mixed cations has good application prospect in the field of proton conductor preparation.

Description

technical field [0001] The invention belongs to the technical field of synthesis of Weakley type polyacid compounds, and in particular relates to a Weakley type polyacid compound containing mixed cations and its preparation method and application. Background technique [0002] Inorganic solid proton conductors with protons as charge carriers have important research value in hydrogen sensors, hydrogen production by electrolysis / photolysis of water, separation and purification of hydrogen, hydrogenation or dehydrogenation of organic compounds, especially in fuel cells and broad application prospects. The abbreviation of polyoxometalate is polyacid, which is composed of the former transition metal Mo VI , W VI , V V , Nb V 、 Ta V Metal-oxygen clusters with oxygen atoms. [0003] In the solid state, polyacid molecules usually contain multiple crystal waters and coordination waters. These water molecules can serve as proton acceptors and donors, which is the main reason why...

AI Technical Summary

Problems solved by technology

However, there are no examples of such compounds as proton conductors, since the characteristics of the structure and charge of polyanion clusters, the type of cations, the number and arrangement of crystallization water and coordination water will affect the proton conduction behavior of polyacids, It is of great significance to design and synthesize novel Weakley polyacid compounds suitable for proton-conducting characteristics

Images