Hydrogenation of Graphene and Hydrogen Diffusion Behavior on Graphene/Graphane Interface

Ao, Zhimin; Li, Sean

doi:10.5772/20676

Cited by 17 publications

(14 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, the hydrogen storage on metal organic framework's (MOFs) [3,[13][14][15], zeolite's [16,17] and carbon nanotubes [18][19][20][21][22][23][24][25], graphene [26][27][28] and activated carbons (ACs) have been reported in the literature by several groups. Among these ACs have proved to be one of the most promising adsorbent material for storage of hydrogen due to their availability, low cost and with tunable surface area.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of activated carbon from jute fibers for hydrogen storage

Ramesh

Rajalakshmi

Dhathathreyan

2017

Renew. Energy Environ. Sustain.

View full text Add to dashboard Cite

Abstract. Activated carbons (ACs) are being used as energy storage material especially for hydrogen storage application. In the present work, AC materials were synthesized from jute fibers, activated and treated using KOH to increase the porosity of samples. These AC samples retained the fibrous structure even after chemical activation at high temperature of 700°C. Channel like structures were formed which helps to increase the hydrogen storage capacity. The surface area of these samples varied from 380 to 1220 m 2 /g due to carbonization and activation treatment. The sample with high surface area of 1224 m 2 /g showed a high hydrogen uptake capacity of 1.2 wt.% at 30°C and 40 bar of H 2 gas pressure. This sample also showed a high pore volume of 0.74 cm 3 /g. These results indicate that the raw material jute fibers can be used as hydrogen storage medium after thermal and chemical treatment which increases the surface area and micropore volume.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of activated carbon from jute fibers for hydrogen storage

Ramesh

Rajalakshmi

Dhathathreyan

2017

Renew. Energy Environ. Sustain.

View full text Add to dashboard Cite

show abstract

“…External electric fields were shown to act as catalysts for this process 71,72 , being able to deform the already perturbed orbitals. This effect is synergetic with that of substitutional doping 73,74,75 promising fast kinetics, large GD (6.73%) at room temperature and the possibility of using electric field for switch uptake/release of molecules.…”

Section: Manipulation Of Reactivitymentioning

confidence: 92%

Morphing Graphene-Based Systems for Applications: Perspectives from Simulations

et al. 2017

View full text Add to dashboard Cite

Graphene, the one-atom-thick sp 2 -hybridized carbon crystal, displays unique electronic, structural and mechanical properties, which promise a large number of interesting applications in diverse high-tech fields. Many of these applications require its functionalization, e.g., with substitution of carbon atoms or adhesion of chemical species, creation of defects, modification of structure or morphology, to open an electronic band gap to use it in electronics, or to create 3D frameworks for volumetric applications. Understanding the morphology-properties relationship is the first step to efficiently functionalize graphene. Therefore, a great theoretical effort has been recently devoted to model graphene in different conditions and with different approaches involving different levels of accuracy and resolution. Here, we review the modeling approaches to graphene systems, with a special focus on atomistic level methods, but extending our analysis onto coarser scales. We illustrate the methods by means of applications with possible potential impact.

show abstract

“…34 N-type doping of graphene has been shown to improve degree of hydrogenation. 35 To better control the deposition of metal and increase reproducibility, 20 nm of either Pt or Au were E-beam evaporated on the graphene surface. Raman spectroscopy was used to confirm no changes to the material quality of the EG had occurred after evaporation of metals.…”

Section: Resultsmentioning

confidence: 99%

Metal Catalyzed Electrochemical Synthesis of Hydrocarbons from Epitaxial Graphene

Daniels

Obe

Daas

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

Pt/Au transition metal catalysts are shown to significantly improve the electrochemical hydrogenation of low defect density epitaxial graphene (EG) layers ∼2ML thick on Si-face 6H-SiC Initial experiments using Pt nanoparticles deposited from aqueous solution showed large increases in hydrogenation, however, this method demonstrated large variability, attributed to the aqueous nature of the catalyst deposition, known to change the conductivity and reactivity of graphene, as well as clustering of Pt nanoparticles. To reduce process variability, 20 nm thick evaporated metals were used. From Raman, the average observed hydrogen cluster density ∼10 11 cm −2 was similar to the average densities of intrinsic defects (10 10,11 cm −2 ) and charge impurities (10 11 cm −2 ) consistent with recent reports that these sites play a crucial role in the hydrogenation of EG. Au catalysts (3.23 ± 0.22%wt) showed slightly better H-incorporation than Pt (2.81 ± 0.03%wt), an observation we attribute to the fact that H 2 dissociation is no longer the rate-limiting step, as H + is readily available in the aqueous state. The electrochemical enablement of these hydrogenation pathways using catalysts offers new routes to carbon chemistries for hydrogen storage, bandgap engineered hydrocarbons as well as EG-based battery electrodes.

show abstract

Hydrogenation of Graphene and Hydrogen Diffusion Behavior on Graphene/Graphane Interface

Cited by 17 publications

References 55 publications

Synthesis and characterization of activated carbon from jute fibers for hydrogen storage

Synthesis and characterization of activated carbon from jute fibers for hydrogen storage

Morphing Graphene-Based Systems for Applications: Perspectives from Simulations

Metal Catalyzed Electrochemical Synthesis of Hydrocarbons from Epitaxial Graphene

Contact Info

Product

Resources

About