A DRIFT spectroscopic study of acetylene adsorbed on metal oxides

A DRIFT spectroscopic study of acetylene adsorbed on metal oxides Full article

Journal

Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084

Output data

Year: 2003, Volume: 5, Number: 20, Pages: 4718–4723 Pages count : DOI: 10.1039/b307138c

Authors

Ivanov Alexander V. ¹ , Koklin Alexei E. ¹ , Uvarova Elena B. ¹ , Kustov Leonid M. ¹

Affiliations

1	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., Moscow, Russia

The interaction of acetylene with surface sites of SiO2, TiO2, CaO, MgO, Al2O3, Ga2O3, La2O3, and ZrO2 oxides was studied. Two main types of acetylene adsorption complexes were found: first, complexes formed by weak reversible adsorption at O2− sites and basic OH groups and, second, stable complexes formed by the dissociative adsorption of acetylene at Meδ+–Oδ− pairs with the formation of acetylide species. The position of the C–H band in weakly adsorbed complexes and C[triple bond, length as m-dash]C bands in strongly adsorbed complexes can be used for the sensitive characterization of oxide basicity. The measurements performed at elevated acetylene pressures (10–20 Torr) give information on the total basicity of oxides, whereas the analysis of the complexes formed at low pressures (∼0.2 Torr) characterizes the properties of specific absorption sites. The interaction of acetylene with surface sites was mainly reversible; however, the products of acetylene oligomerization could be observed in the long-term experiments.

Ivanov A.V. , Koklin A.E. , Uvarova E.B. , Kustov L.M.
A DRIFT spectroscopic study of acetylene adsorbed on metal oxides
Physical Chemistry Chemical Physics. 2003. V.5. N20. P.4718–4723. DOI: 10.1039/b307138c WOS Scopus OpenAlex

≡ Web of science:	WOS:000185960200055
≡ Scopus:	2-s2.0-0142185161
≡ OpenAlex:	W1981562568