Biomedical Engineering Reference
In-Depth Information
relevant also to add that one could try to use the technique of the
electrolytic hydrogen charging of materials instead of the atomic
atomizer technique.
Figure 2.24
Arrangement of H
molecules inside a (5, 5) SWNT for
different mass densities of hydrogen [20]: (a) 20, (b) 51, (c)
90, (d) 125, (e) 142 (kg/m
3
).
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2.3.3 On the Hydrogen Intercalation vs. Chemisorption
Mechanisms: Spillover Enhancement of the
Sorption Capacity of Carbonaceous Nanomaterials
with Metals-Catalyst Nanoparticles
Recently, a number of data have been obtained on the spillover
enhancement (of about one order of magnitude; see Fig. 2.25) of
the hydrogen storage capacity by carbonaceous nanomaterials
containing some amount of transition metals nanoparticles, e.g., Pd,
Pt, or Ni, acting as H
dissociation catalysts [27-35].
In this context, a renewed interest for carbonaceous nanostruc-
tures relevant to the on-board storage problem has been empha-
sized [30].
It is supposed [27-35] that the presence of highly dispersed
metal nanoparticles (Pd or others) in carbon nanomaterials facilitates
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