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On the nature of the so-called iron-graphite

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Herein,  Daniel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Braun,  Thomas
Fritz Haber Institute, Max Planck Society;

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Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Herein, D., Braun, T., & Schlögl, R. (1997). On the nature of the so-called iron-graphite. Carbon, 35(1), 17-29. doi:10.1016/S0008-6223(96)00078-4.


Cite as: https://hdl.handle.net/21.11116/0000-0008-E295-0
Abstract
Searching for the chemical and catalytic properties of iron-graphite, we reduced stage-1 FeCl3-graphite intercalation compounds (GIC) with K-naphthalenide/THF solutions, methyl-Li/THF solutions and hydrogen under various conditions. In addition, stage-1 K-GIC and K(THF)x-GIC were allowed to react with different iron compounds such as FeCl3, Fe(acac)3, Fe(AcO)2 and Fe(CO)2(NO)2. The reduction of stage-1 FeCl3-GIC by solutions resulted in graphite, three-dimensional iron platelets, iron oxides and residual FeCl2-GIC encapsulated by carbon. In some cases, intercalation of the reducing agent was observed. The samples reduced at high temperatures with hydrogen consist of graphite and three-dimensional iron platelets on the surface of the graphite flakes with a small amount of residual FeCl2-GIC. In contrast to the reduction of FeCl3-GIC, the reaction of K-GIC and K(THF)x-GIC with iron compounds resulted in the formation of graphite, isotropic three-dimensional particles of metallic and oxidic iron supported on graphite, and residual K-GIC. No lamellar two-dimensional Fe-graphite structure was found in any of these samples.