A perovskite material represented by Formula 1:
Li.sub.xA.sub.yM.sub.zO.sub.3-?Formula 1 wherein in Formula 1, 0<x?1, 0<y?1, 0<x+y<1, 0<z?1.5, 0???1, A is H, Na, K, Rb, Cs, Ca, Sr, Ba, Y, La, Ce, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, or a combination thereof, and M is Ni, Pd, Pb, Fe, Ir, Co, Rh, Mn, Cr, Ru, Re, Sn, V, Ge, W, Zr, Mo, Hf, U, Nb, Th, Ta, Bi, Li, H, Na, K, Rb, Cs, Ca, Sr, Ba, Y, La, Ce, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Mg, Al, Si, Sc, Zn, Ga, Ag, Cd, In, Sb, Pt, Au, or a combination thereof.

A sodium-containing oxide positive electrode material and a preparation method therefor and use thereof are disclosed. Also disclosed are a positive electrode plate and uses thereof.

The invention relates to polyoxometalates represented by the formula (A.sub.n).sup.m+{M.sub.s[MM.sub.12X.sub.8O.sub.yR.sub.zH.sub.q]}.sup.m or solvates thereof, corresponding supported polyoxometalates, and processes for their preparation, as well as corresponding metal-clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate.

A method for preparing a nano-titanate, a nano-titanic acid and a nano-TiO.sub.2 containing embedded A nanoparticles is provided respectively. In this method, a Ti-T alloy with a A-group element solidly dissolved therein is used as a titanium source, and reacted with an alkali solution under a certain condition. In combination with subsequent treatment, the preparation of a titanate nanotube, a titanic acid nanotube, and a TiO.sub.2 nanotube/rod containing embedded A nanoparticles, respectively, is further achieved with high efficiency and low cost. Moreover, a method for preparing metal nanoparticles is also provided by removing the matrix of the composites. The present preparation methods is characterized by simple process, easy operation, high efficiency, low cost. The product is of promising application in polymer-based nanocomposites, ceramic materials, catalytic materials, photocatalytic materials, hydrophobic materials, effluent degrading materials, bactericidal coatings, anticorrosive coatings, marine coatings.

The invention relates to poly oxometalates represented by the formula (A.sub.n).sup.m+{M.sub.s[MM.sub.15X.sub.10O.sub.yR.sub.zH.sub.q]}.sup.m or solvates thereof, corresponding supported poly-oxometalates, and processes for their preparation, as well as corresponding metal-clusters, optionally in the form of a dispersion in a liquid carrier medium or immobilized on a solid support, and processes for their preparation, as well as their use in reductive conversion of organic substrate.

A ruthenium compound exhibits large negative thermal expansion. The ruthenium oxide is represented by the formula (1) Ca.sub.2xR.sub.xRu.sub.1yM.sub.yO.sub.4+z (wherein R represents at least one element selected from among alkaline earth metals and rare earth elements; M represents at least one element selected from among Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, and Ga; and the following relations are satisfied: 0x<0.2, 0y<0.3, and 1<z<0.02).

Disclosed herein are a positive electrode active material including at least one selected from among compounds represented by Formula 1 below and a lithium secondary battery including the same that is capable of improving lifetime characteristics and rate characteristics while exhibiting excellent safety: xLi.sub.2M.sub.yMn.sub.(1-y)O.sub.3-zA.sub.z*(1x)LiMO.sub.2-zA.sub.z (1), where M is at least one element selected from a group consisting of Ru, Mo, Nb, Te, Re, Ir, Pt, Cr, S, W, Os, and Po, M is at least one element selected from a group consisting of Ni, Ti, Co, Al, Mn, Fe, Mg, B, Cr, Zr, Zn, and second row transition metals, A and A are each independently a negative monovalent or divalent anion, and 0<x<1, 0.3<y<1, 0z<0.5, and 0z<0.5.

The present invention relates to a method of making a mercury based compound, to a mercury based compound and to methods of using the mercury based compound and to uses of the mercury based compound.

A metal bronze compound is provided. The metal bronze compound is a compound represented by formula (1) below. In formula (1), A represents at least one type of cation. M represents at least two types of ions selected from a transition metal and a metalloid. x represents the sum of the number of the at least one type of cation used as A. y represents the sum of the number of the at least two types of ions selected from the transition metal and the metalloid used as M. z represents the number of oxygen ion. The values of x, y and z balance the charge number of formula (1).

A.sub.xM.sub.yO.sub.z (1)

The disclosure provides a metal catalyst having a structure as shown in the Formula (1) or Formula (2), wherein M is palladium, copper, platinum, nickel or silver ions; X is fluorine, chlorine, bromine or iodine; and L is a chelator ligand of nitrogen-containing aromatic ring. The disclosure also provides a manufacturing method and applications of the metal catalyst.

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