On the mechanism of the oxidation of graphite by molecular oxygen

Schlögl, Robert; Loose, Gisela; Wesemann, Michael

doi:/10.1016/0167-2738(90)90483-8

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On the mechanism of the oxidation of graphite by molecular oxygen

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Loose, Gisela
Fritz Haber Institute, Max Planck Society;

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Wesemann, Michael
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Schlögl, R., Loose, G., & Wesemann, M. (1990). On the mechanism of the oxidation of graphite by molecular oxygen. Solid State Ionics, 43, 183-192. doi:/10.1016/0167-2738(90)90483-8.

Cite as: https://hdl.handle.net/21.11116/0000-0008-7999-4

Abstract

The reaction of oxygen with (0001) faces of graphite was investigated at 940 K under in situ conditions and after reaction experiments at atmospheric pressure. High resolution SEM revealed significant differences in the morphology of the reacting surfaces. STM showed at near atomic resolution the lateral inhomogeneity of the reacted surfaces and revealed direct evidence for the layer by layer oxidation of the anisotropic graphite coexisting with mechanisms leading to rough surfaces. Electron spectroscopy as XPS and UPS was used in combination with TPRS to establish a variety of oxygen species at reacting surfaces. The formation of water or hydroxyl groups involving hydrogen from the carbon surface seems to be an important step in the oxidation reaction.