Surface acid sites of H3PW12O40 as studied by the adsorption of stable nitroxyl radicals

被引：0
|
作者：
M. N. Timofeeva
A. B. Ayupov
A. M. Volodin
Yu. R. Pak
G. G. Volkova
G. V. Echevskii
机构：
[1] Russian Academy of Sciences,Boreskov Institute of Catalysis, Siberian Division
[2] Novosibirsk State University,undefined
来源：
Kinetics and Catalysis | 2005年 / 46卷 / 1期
关键词：
Physical Chemistry; Catalysis; Acidity; Catalytic Activity; Acid Site;
D O I：
10.1007/PL00021995
中图分类号：
学科分类号：
摘要：
The surface acidity of H3PW12O40 and NaxH3-xPW12O40(x = 1-3) was studied using the adsorption of 2,2′,6,6′-tetramethyl-4-oxopiperidine-1-oxyl (TEMPON) and 2,2′,6,6′-tetramethyl-4-hydroxypiperidine-1-oxyl (TEMPOL) radicals. It was found that the amount of surface proton sites determined from the adsorption of TEMPON decreased with the degree of substitution of Na+ cations for protons. A correlation between amount of strong surface proton sites and catalytic activity of NaxH3-xPW12O40(x = 0-3) in the dealkylation reaction of 2,6-di-tert-butyl-4-methylphenol was found.
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页码：123 / 127
页数：4
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