Krassimir Tenchev

Copper-cobalt ferrites as catalysts for methanol decomposition

AbstractCopper-cobalt ferrites with composition Cu1−xCoxFe2O4, where x= 0.2 and 0.8 were prepared by thermal treatment of co-precipitated precursor. The obtained materials were characterized by TG-DSC, XRD, Transmission and Conversion Electron Mössbauer spectroscopy and temperature programmed reduction with hydrogen. The catalytic properties of ferrites were tested in methanol decomposition to CO and hydrogen.

Oscillations during the interaction between carbon monoxide and oxygen on palladium-containing catalysts

Abstract Oscillations in the heat effect of the reaction and in the composition of the reaction products during the oxidation of carbon monoxide over Pd/Al 2 O 3 , Pd-Ce/Al 2 O 3 , and Pd-Co/Al 2 O 3 catalysts under steady-state conditions have been studied. In situ infrared spectroscopy measurements identify the occurrence of different active sites and intermediate surface species during the oxidation reaction both in the oscillatory and non-oscillatory modes. Different types of oscillations, depending on the reaction conditions are described.