Citation: Zheng Shou-Rong, Qi Hai-Hua, Yan Qi-Jie, Fu Xian-Cai. A Study of the Interaction Between 12-Molybdophosphoric Acid and γ-Alumina[J]. Acta Physico-Chimica Sinica, 1994, 10(06): 521-525. doi: 10.3866/PKU.WHXB19940608
12-钼磷酸与γ-Al2O3载体的相互作用
English
A Study of the Interaction Between 12-Molybdophosphoric Acid and γ-Alumina
12-moybdophosphoric acid (PMo_(12)) supported on γ-alumina has been studied by XRD, LRS EPR and titration methods.
The results reveal that as PMo_(12) loading is lower or equal to the monolayer coverage, there is a strong interaction between PMo_(12) and γ-alumina, PMo_(12) is adsorbed by γ-alumina irreversibly and a tetrahedral coordinatha Mo-O-Al species is observed.
Beyond monolayer coverage, the PMo_(12) is dispersed on γ-alumina as primary structure, and a secondary structure PMo_(12) is observed at more higher loading. The EPR results show that the stability of the supported PMo_(12) is lower than that of the unsupported PMo_(12) and the stability of PMo_(12) in the above three diffrent states is not the same. A model of PMo_(12) dispersed on γ-alumina is suggested.
-
Key words:
-
12-molybdophosphoric acid
- / γ-alumina
- / Dispersion
- / Interaction
扫一扫看文章
计量
- PDF下载量: 2145
- 文章访问数: 3475
- HTML全文浏览量: 47
下载:
