Hydrogen Adsorption of Alkali Metal Complexes of Polycyclic Aromatic Hydrocarbon and Graphite, and Their Solid State Properties

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Abstract
The hydrogen adsorption in alkali metal complexes of graphite and triphenylene has been investigated by means of ESR and electrical resistivity under hydrogen atmosphere. In the first stage graphite compound C8Rb, hydrogen molecules are dissociated into atoms which are stabilized in graphite gaps. C8K has a two stage hydrogen adsorption process: dissociation and charge transfer. For C8Cs, the catalytic activity for hydrogen comes from the surface. The second stage compounds C24M (M=K, Rb, and Cs) show weaker activities for hydrogen than the first stage ones. Triphenylene-potassium complex has a two stage process for hydrogen adsorption.