Anisotropic reactivity, role

PG and HOPG materials play an important role in understanding carbon electrode structure and reactivity due to their anisotropic nature [2]. In some special cases, basal plane HOPG and EPG electrodes are of particular value in electroanalytical applications for both fundamental and pragmatic reasons. Examples are shown in Figures 10.7 to 10.9. Figure 10.7 shows the voltammetry... 

Although the great majority of petroleum and coal-based pitch materials, as well as model compounds such as polyvinyl chloride, acenaphthylene, decacyclene and polynuclear aromatic hydrocarbons, form anisotropic graphitizable carbons, it is an almost impossible task to predict the type of optical texture of a coke from an elemental analysis of the pitch. The size, shape and reactivity of peri-condensed polynuclear aromatic molecules in the products of pyrolysis of a pitch play a more important role in determining optical texture. 

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