摘要
引言近年来,杂多酸及其盐炎在催化领域内受到人们的普遍关注.对以P为杂原子的杂多酸的热稳定性和酸性已有大量研究报道.对以Si为杂原子的12-钼硅酸和12-钨硅酸虽也有过考察,但系统研究改变多原子组成对12-钨钼硅系杂多酸的热稳定性和酸性的影响则尚未见报道.本文考察了H<sub>4</sub>SiMo<sub>12-n</sub>W<sub>n</sub>O<sub>40</sub>（n=0,3,6,9,12）的热稳定性和酸催化性能.
Hctcropolyacids H4SiMo12-nWnO40(n = 0,3,6,9,12) have been prepared. The thermal stabilities of all samples have been determined by use of IR, XRD, LRS, XPSand DTA. With the probe of 2-propanol dehydration reaction, the samples' acid catalytic properties have been studied. It is shown that the thermal stabilities and catalytic activities of hctcropolyacids increase linearly with the number of atom W in the samples. With increasing the calcination temperatures, hctcropolyacids containing W atom decompose to form WO3, but no crystalline MoO3 observed within our experimental temperatures.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1991年第3期366-369,共4页
Chinese Journal of Inorganic Chemistry
关键词
杂多酸
钨钼硅
酸催化
12-tungstomolybdoslllele acid, thermal stability, acid catalytic property
