The multimetal oxide materials essentially consisting of
Mo12BiaX1bFecX2dX3eOy (I)
where:
X1 is Co and/or Ni,
X2 is Si and/or Al,
X3 is an alkali metal,
0.3≦a≦1,
2≦b≦10,
0.5≦c≦10,
0≦d≦10,
0≦e≦0.5 and
y is the absolute value of the number which, assuming charge neutrality, is obtained from the sum of the valences and the stoichiometric coefficients of the other elements, the crystalline fractions containing, in addition to &bgr;-X1MoO4 as the main component, Fe2(MoO4)3 as a secondary component and no MoO3.
多金属氧化物材料基本上由Mo12BiaX1bFecX2dX3eOy组成(I),其中:
X1是Co和/或Ni,
X2是Si和/或Al,
X3是一种碱
金属,
0.3≤a≤1,2≤b≤10,0.5≤c≤10,0≤d≤10,0≤e≤0.5,
y是一个绝对值,假设电荷中性,由其他元素的价和
化学计量系数的和得出,结晶分数除了主要成分为β-X1 外,还包含Fe2(
MoO4)3作为次要成分,不含
MoO3。