Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 24, Issue 6, Pages 1363-1370Publisher
SPRINGER
DOI: 10.1007/s10008-020-04642-x
Keywords
Graphite intercalation compound; Perrhenic acid; Electrochemical oxidation; Exfoliation; Rhenium oxide
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Funding
- National Science Centre, Poland [2018/02/X/ST5/02765]
- Ministry of Science and Higher Education
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In present work, we describe the synthesis of graphite intercalation compounds with perrhenic acid (HReO4-GIC) through the anodic oxidation of graphite in aqueous perrhenic acid solution and their thermal exfoliation. Due to electrochemical treatment of graphite in perrhenic acid solution, ReO4- ions are intercalated into interlayer spaces of graphite. Anodic oxidation of graphite in HReO4 solution leads to the formation of 3-stage GIC. Simultaneously, some amount of perrhenic acid becomes deposited on the graphite surface and edges. In the next step, thermal treatment of the previously synthesized GIC was performed, causing both the exfoliation of graphitic structure and transformation of perrhenic acid into rhenium oxides on the surface of graphene layers. The yielded product was exfoliated graphite-ReO2/ReO3 composite. The obtained composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. Additionally, specific surface area of the exfoliated materials was measured.
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