Reversible hydrogenation of deuterium-intercalated quasi-free-standing graphene on SiC(0001)

Bocquet, François C.; Bisson, Régis; Themlin, J.‐M.; Layet, J. M.; Angot, Thierry

doi:10.1103/physrevb.85.201401

Cited by 16 publications

(28 citation statements)

References 37 publications

(51 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In [55], hydrogenation of deuterium-intercalated quasifree-standing monolayer graphene on SiC(0001) was obtained and studied with low-energy electron diffraction (LEED) and high-resolution electron energy loss spectroscopy (HREELS). While the carbon honeycomb structure remained intact, it has shown a significant band gap opening in the hydrogenated material.…”

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

“…According to a private communication from R. Bisson, the temperature indicated at each point of data [55] corresponds to successive temperature ramp (not linear) of 5 minutes. Within a formal kinetics approach for the first order reactions [14,46], one can treat the above noted points at T i = 543 K, 611 K and 686 K, by using Eq.…”

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

“…Within a formal kinetics approach for the first order reactions [14,46], one can treat the above noted points at T i = 543 K, 611 K and 686 K, by using Eq. (8) transformed to a more suitable form (8′): K i  -(ln(C/C 0i )/t), where t = 300 s, and the corresponding quantities C 0i and C are determined from [55]. It resulted in finding values of the reaction (hydrogen desorption from SiC-D/QFMLG-H samples) rate constant K i for 3 temperatures T i = 543, 611 and 686 K. The temperature dependence is described by Eq.…”

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

“…In the same way, one can treat the points from data [55] at T i = 1010, 1120 and 1200 K, which one are related to the intercalated deuterium desorption from SiC-D/QFMLG samples. This results in finding the desired quantities ( Table 2) .…”

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

“…This results in finding the desired quantities ( Table 2) . The authors supposed that it may be related to hydrogen chemisorbed on the silicon atoms of the SiC substrate below the graphene plane [55]. Formally, this desorption process (of a diffusion-limiting character) may be described similarly to TDS process (peak) III in [14,[18][19][20][21], and the apparent diffusion activation energy may be close to the break-down energy of the Si-H bonds.…”

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

See 4 more Smart Citations

On Thermodynamic Stability of Hydrogenated Graphene Layers, Relevance to the Hydrogen on-board Storage

Nechaev

Везироглу²

2013

TOFCJ

View full text Add to dashboard Cite

The present analytical study using thermodynamic methods for analysis of data from a number of theoretical and experimental works, devoted to the current problem of thermodynamic stability and related thermodynamic characteristics of the following graphene layers systems: 1) double-side hydrogenated graphene of composition CH -theoretical graphane (Sofo et al. 2007) and experimental graphane (Elias et al. 2009); 2) theoretical single-side hydrogenated graphene of composition CH; 3) theoretical single-side hydrogenated graphene of composition C 2 H -graphone; 4) experimental hydrogenated epitaxial graphene, bilayer graphene and a few layers of graphene on SiO 2 or other substrates; 5) experimental and theoretical single-external side hydrogenated single-walled carbon nanotubes, and experimental hydrofullerene C 60 H 36 ; 6) experimental single-internal side hydrogenated (up to C 2 H or CH composition) graphene nanoblisters with intercalated high pressure H 2 gas inside them, formed on a surface of highly oriented pyrolytic graphite or epitaxial graphene under the atomic hydrogen treatment; and 7) experimental hydrogenated graphite (multigraphene) nanofibers with intercalated solid H 2 nano-regions inside them. The main target of the present study is to show a possible breakthrough in solving the problem of hydrogen on-board storage in fuel cell powered vehicles (Nechaev -2012.

show abstract

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

Section: Analysis Of the Hreels/leed Data On Thermal Desorption Of Hymentioning

confidence: 99%

See 3 more Smart Citations

On Thermodynamic Stability of Hydrogenated Graphene Layers, Relevance to the Hydrogen on-board Storage

Nechaev

Везироглу²

2013

TOFCJ

View full text Add to dashboard Cite

show abstract

First-principles study of H adsorption on graphene/SiC(0001)

Sclauzero

Pasquarello

2013

Phys. Status Solidi B

View full text Add to dashboard Cite

The adsorption of atomic H above the carbon buffer layer in the graphene/SiC(0001) interface system is investigated within density functional theory through a set of realistic interface models that do not impose large artificial strains on the graphene. We find that hydrogen binding energies above the buffer layer are two to four times higher than on free-standing graphene and display important spatial variations across the unit cell. Adsorption on Si-bonded, fourfold-coordinated C atoms is strongly unfavorable (unstable, or metastable with very low barriers), while all threefold-coordinated C sites lead to stable configurations often showing H binding energies larger than in H 2 . We identify the origin of these large binding energies in the local strengthening of the graphene/SiC interface bonding around the adsorption site due to the H-induced deformation of the graphene buffer layer. The most stable adsorption sites are those having two or three C nearest neighbors (almost) atop the underlying surface Si atoms, because the presence of the adsorbed H atom favors the formation of a local sp 3 arrangement of the graphene.

show abstract

Hydrogenation of the buffer-layer graphene on 6H-SiC (0001): A possible route for the engineering of graphene-based devices

2014

View full text Add to dashboard Cite

Reversible hydrogenation of deuterium-intercalated quasi-free-standing graphene on SiC(0001)

Cited by 16 publications

References 37 publications

On Thermodynamic Stability of Hydrogenated Graphene Layers, Relevance to the Hydrogen on-board Storage

On Thermodynamic Stability of Hydrogenated Graphene Layers, Relevance to the Hydrogen on-board Storage

First-principles study of H adsorption on graphene/SiC(0001)

Hydrogenation of the buffer-layer graphene on 6H-SiC (0001): A possible route for the engineering of graphene-based devices

Contact Info

Product

Resources

About