Catalytic oxidation of ticonderoga graphite crystals
1968; Elsevier BV; Volume: 6; Issue: 3 Linguagem: Inglês
10.1016/0008-6223(68)90031-6
ISSN1873-3891
Autores Tópico(s)Graphene research and applications
ResumoAn attempt has been made to correlate the catalytic oxidation of Ticonderoga graphite crystals with the density and type of the active sites accessible to the oxidizing atmosphere. By combining the techniques of optical microscopy and mass-spectrometry it has been established that such active sites are synonymous with lattice imperfections threading the basal planes of a graphite crystal. The distribution of these defects is perhaps best discussed in terms of the mosaic structure of a crystal, insomuch as often almost the entire population of defects (e.g. forest screws and vacancy loops) reside in only one component crystallite. The residual boron content of a surface after catalytic oxidation has been determined and its value correlated with the density of etch pits intersecting the same surface. As a consequence further information regarding the interaction of the catalytic species with lattice imperfections is obtained. Moreover, such determinations yield a lower limit for the catalyst concentration which produces a maximum rate of oxidation for the particular surface under consideration.
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