Hydrogen-carbon bond on the nanostructured graphite for hydrogen sensor

Yinghe Zhang, David Book

    Research output: Contribution to journalArticlepeer-review


    There is a need to understand the hydrogen sorption mechanism(s). In this work, hydrogenated graphite samples were characterized by TGA-Mass Spectrometry, Raman spectros-copy 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)15-19
    Number of pages5
    JournalUnknown Journal
    Issue number24
    Publication statusPublished - 2013

    ASJC Scopus subject areas

    • Engineering(all)


    Dive into the research topics of 'Hydrogen-carbon bond on the nanostructured graphite for hydrogen sensor'. Together they form a unique fingerprint.

    Cite this