A TPD-MS study of glassy carbon surfaces oxidized by CO2 and O2

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 ch...

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Published inJournal of the Serbian Chemical Society Vol. 67; no. 11; pp. 761 - 768
Main Authors MILA D. LAUSEVIC, ZORAN V. LAUSEVIC, MIOMIR V. VELJKOVIC, OLIVERA M. NESKOVIC, ALEKSANDRA A. PERIC-GRUJIC
Format Journal Article
LanguageEnglish
Published Serbian Chemical Society 01.11.2002
Subjects
glassy carbon
mass spectra
oxidation
temperature-programmed desorption
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Summary: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 O2 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 the surface oxide groups and contributes to their increased stability.
ISSN:0352-5139