E. Guglielminotti et F. Boccuzzi, A FTIR STUDY OF ETHYLENE OXIDATION ON AN RU ZNO SYSTEM/, Spectrochimica acta. Part A: Molecular spectroscopy, 49(9), 1993, pp. 1423-1431
The interaction of ethylene with a highly dispersed and oxidized Ru/Zn
O catalyst has been studied at room temperature (RT) by FTIR spectrosc
opy. A fast oxidative reaction at RT produces a glycolate-like species
strongly adsorbed on the surface, and at the same time the depletion
of a strong and narrow band assigned to an Ru=O surface group. The ass
ignment of the spectrum of a C2H4O2 complex, characterized by two inte
nse bands at 1035 and 890 cm-1 and by 10 other bands in the range 3000
-700 cm-1, is performed on the basis of a C2nu symmetry and confirmed
by C2D4 oxidation data; this assignment is performed by comparison of
our spectra with the literature data for ethylene glycol and related c
omplexes. A long oxidative reaction at RT with formation of formate an
d carboxylate-like species at the expense of the glycolate was also ob
served.