Abstract
Thermodynamic stimuli and energetics of intercalation of H 2 nanophase of a high density into carbon-based nanostructures are considered. The physics of the extraordinary manifestation of the Kurdjumov-like effect and the hydrogen spillover-like one, relevance to the problem of the efficient hydrogen storage in graphite nanofibers are discussed.
Highlights
Over the past 20 years, many scientists have reported that hydrogen spillover is a viable technique to achieve more hydrogen storage on different carbon-based materials and nanomaterials, even at ambient conditions [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]
The present study is related to the extraordinary data on molecular gaseous hydrogen interactions with graphite nanofibers, when, as is shown in this study, a unique manifestation of both the spillover effect [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25] and the Kurdjumov-like [28, 29] extraordinary effect occur
In the light of analysis [26, 27], both the spillover effect and the Kurjumov-like effect are obviously manifested in the extraordinary data {Gupta et al (2001, 2004)} (Fig. 24 in [27]) and the extraordinary data {Park et al (1999)} considered in [27]
Summary
Over the past 20 years, many scientists have reported that hydrogen spillover is a viable technique to achieve more hydrogen storage on different carbon-based materials and nanomaterials, even at ambient conditions [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25]. The spillover mechanism and energetics of molecular hydrogen on different carbonbased materials and nanomaterials, in the presence of metallic catalysts, has not been satisfactory understood up to nowadays [1]. These open questions are considered in the present study, which is a further development of results [26] and the previous results [27] (of an open access). The mechanism and energetics of such two effects are revealed, by comparing with data on atomic gaseous hydrogen interactions with highly oriented pyrolytic graphites (without any catalysts) and epitaxial graphenes ( without any catalysts)
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