A TPD-MS study of glassy carbon surfaces oxidized by CO2 and O-2
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The temperature-programmed desorption (TPD) method combined with mass spectrometric (MS) analysis has been applied to investigate the surface properties of carbon materials. The apparatus consisting of a temperature-programmed furnace and a quadrupole Mass spectrometer was constructed in order to characterize the surface of differently treated glassy carbon samples. In this work, samples of glassy carbon exposed to air, CO2 and O-2 were examined. The desorption of H2O, CO and CO2, as major products, indicated the presence of different oxide groups. The amount of these groups for all samples was calculated. It is concluded that oxidation affects the nature and the amount of die surface oxide groups and contributes to their increased stability.
Кључне речи:glassy carbon / oxidation / mass spectra / temperature-programmed desorption
Извор:Journal of the Serbian Chemical Society, 2002, 67, 11, 761-768
ISSN: 0352-5139 (print)