Hydrogen-carbon bond on the nanostructured graphite for hydrogen sensor

Yinghe Zhang, David Booka

    Research output: Contribution to journalArticle

    Abstract

    There is a need to understand the hydrogen sorption mechanism(s). In this work, hydrogenated graphite samples were characterized by TGA-Mass Spectrometry, Raman spectroscopy and high resolution TEM. It was found that graphite milled for various times (0-40 h) had different d-spacings and CHx (x≤3) ratios. Graphite milled up to 10 h that was subsequently heated (under argon to 990 °C) desorbed only hydrogen, while above 10 h the amount of desorbed hydrogen decreased and an increasing amount of methane was also evolved. The 10 h sample had no measurable sp3 bonding, and desorbed 5.5 wt% hydrogen when heated. While the 40 h sample had a d-spacing of 0.48 nm, both sp2 and sp 3 bonding, and desorbed 5.1 wt% pure hydrogen. The mechanism of graphite hydrogenation is discussed in terms of hydrogen atoms being predominately trapped at the graphite edges, rather than between graphene layers.

    Original languageEnglish
    Pages (from-to)27-31
    Number of pages5
    JournalUnknown Journal
    Volume58
    Issue number47
    DOIs
    Publication statusPublished - 2013

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    Graphite
    graphite
    Hydrogen
    Carbon
    carbon
    sensors
    Sensors
    hydrogen
    spacing
    sorption
    hydrogenation
    hydrogen atoms
    graphene
    mass spectroscopy
    methane
    Graphene
    Raman spectroscopy
    Hydrogenation
    Mass spectrometry
    argon

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Hydrogen-carbon bond on the nanostructured graphite for hydrogen sensor. / Zhang, Yinghe; Booka, David.

    In: Unknown Journal, Vol. 58, No. 47, 2013, p. 27-31.

    Research output: Contribution to journalArticle

    Zhang, Yinghe ; Booka, David. / Hydrogen-carbon bond on the nanostructured graphite for hydrogen sensor. In: Unknown Journal. 2013 ; Vol. 58, No. 47. pp. 27-31.
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