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


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2005-01

AUTHORS

M. N. Timofeeva, A. B. Ayupov, A. M. Volodin, Yu. R. Pak, G. G. Volkova, G. V. Echevskii

ABSTRACT

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. More... »

PAGES

123-127

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10975-005-0061-4

DOI

http://dx.doi.org/10.1007/s10975-005-0061-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1003793355


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