Author： Kazanskii V.
Publisher： MAIK Nauka/Interperiodica
ISSN： 0023-1584
Source： Kinetics and Catalysis, Vol.48, Iss.4, 2007-07, pp. : 479-489
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
The criterion conventionally used to judge bond activation in molecules adsorbed on active sites of heterogeneous catalysts is the bathochromic shift of the corresponding IR absorption bands. The intensity of these bands, which characterizes bond polariability, can be used as an additional bond activation criterion. This new spectral criterion is particularly promising for acid and acid-base catalysis, in which the activation of adsorbed molecules is due to their polarization by active sites. Examples are provided here to illustrate the fruitfulness of the new approach. These examples include judging the strength of Brønsted acid sites from the intensity of the OH stretching band and an analysis of the dissociative adsorption and dehydrogenation of light paraffins on metal cation forms of zeolites and of proton transfer from Brønsted acid sites to adsorbed paraffin molecules.
Related content
New Insights into Heterogeneous Oxidation Catalysis
By Grasselli Robert Trifiro Ferruccio
Topics in Catalysis, Vol. 54, Iss. 10-12, 2011-07 ,pp. :
Access to resources
Recommend
In situ NMR of heterogeneous catalysis: new methods and opportunities
By Haw J.F.
Topics in Catalysis, Vol. 8, Iss. 1-2, 1999-01 ,pp. :
By Salomatina O. Yarovaya O. Korchagina D. Gatilov Yu. Polovinka M. Barkhash V.
Russian Journal of Organic Chemistry, Vol. 41, Iss. 9, 2005-09 ,pp. :