| 简介 |
A layered multimetallic mixed oxide (LMMO) is characterized by one or more diffraction peaks at 5<2θ<15, preferably between 10<2θ<15. The catalysts can be represented by the general formula :
[in-line-formulae]M1 M2 M3 Oδ[/in-line-formulae]wherein M1 is selected from the group of Ag, Au, Zn, Sn, Rh, Pd, Pt, Cu, Ni, Fe, Co, an alkaline metal, an alkaline earth metal, a rare earth metal, or mixtures thereof.M2 is selected from the group of Ti, Hf, Zr, Sn, Bi, Sb, V, Nb, Ta and P, or mixtures thereof.M3 is selected from the group of Mo, W and Cr, or mixtures thereof.δ depends on the amount and oxidation state or valence of the other components, also it depends on the starting materials, preparation method and the activation process, and where the catalyst exhibits at least one X-ray diffraction peak between 5<2θ<15. |
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