C-H bond formation at the graphite surface studied with core level spectroscopy
2008 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 602, no 14, 2575-2580 p.Article in journal (Refereed) Published
We studied the formation of C-H bonds at the surface of graphite under atomic hydrogen treatment using X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). We found that the amount of hydrogenation of the graphite surface at saturation coverage measured by C1s XPS coincides with the amount of hydrogen measured by temperature programmed desorption. This directly indicates that C1s XPS measurements provide reliable information about the amount of hydrogen stored in carboneous materials through the formation of C-H bonds. From angle resolved XAS measurements we found that the C-H bonds are not perpendicular to the surface of the graphite and that the hydrogenated carbon atoms are buckled up from the highly oriented pyrolitic graphite surface.
Place, publisher, year, edition, pages
2008. Vol. 602, no 14, 2575-2580 p.
graphite, hydrogenation, core level spectroscopy, hydrogen storage
IdentifiersURN: urn:nbn:se:su:diva-58266DOI: 10.1016/j.susc.2008.06.012ISI: 000259062200042OAI: oai:DiVA.org:su-58266DiVA: diva2:420236
authorCount :42011-05-312011-05-302011-05-31Bibliographically approved