Publication: Oxidation of carbon monoxide on rare earth cobaltites - Role of spin state equilibrium
Abstract
The catalytic oxidation of CO on a series of LnCoO3 compounds (where Ln=La, Pr, Nd, Sm, Eu, Gd, Dy or Ho) has been studied. The Arrhenius plots show gradient changes around 180-200 °C which is the temperature range wherein ordering of low spin and high spin states starts. The activation energy for CO oxidation in the low temperature region varies linearly with oxygen deficiency. IR-Spectra of the adsorbed species in both the high and low temperature regions show the presence of carbonate species. © 1985 Akadémiai Kiadó.