Patent ID: 7820868

Claim:
Polyoxometalates represented by the formula I (A n ) m+ [M y (H 2 O) p X z Z 2 W 18 O 66 ] m− (I) or hydrates thereof, wherein A represents a cation selected from the group consisting of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, titanium, vanadium, chromium, lanthanum, lanthanide metal, actinide metal, manganese, iron, cobalt, nickel, copper, zinc, ruthenium, palladium, platinum, tin, antimony, tellurium, phosphonium, ammonium, guanidinium, tetraalkylammonium, protonated aliphatic amines, protonated aromatic amines and combinations thereof, n is the number of the cations A, m is the charge of the polyoxoanion, M represents a transition metal selected from Cu, Zn, Pd, Pt and mixtures thereof, y is the number of transition metals M and is a number from greater than 4 to less than 6, p is the number of water molecules and is a number from 0 to 10, X is a halide selected from the group consisting of F, Cl, Br, I and mixtures thereof, z is the number of halides and is a number from 0 to 6 and Z represents a heteroatom selected from Sb III , Bi III , As III , Se IV and Te IV .