X-RAY PHOTOELECTRON SPECTROSCOPIC STUDY OF THE SURFACE OF CARBON DOPED WITH POTASSIUM CARBONATE

Abstract
The X-ray photoelectron spectra of K and O peaks of the carbon impregnated with potassium carbonate were dramatically decreased by evacuation at 650 °C. When oxygen was introduced onto this surface, remarkable growth of these peaks was observed at room temperature, however, in case of contact with carbon dioxide, temperature as high as 650 °C was required to cause the same effect. These results support the reaction mechanism of a redox cycle of catalyst for the reduction of carbon dioxide with carbon.