Short communication: Few-layer graphene-like flakes derived by plasma treatment: A potential material for hydrogen adsorption and storage
Date
2016Author
Kostoglou, NikolaosTarat, Afshin
Walters, Ian
Ryzhkov, Vladislav
Tampaxis, Christos
Charalambopoulou, Georgia
Steriotis, Theodore
Mitterer, Christian
Rebholz, Claus
Source
Microporous and Mesoporous MaterialsVolume
225Pages
482-487Google Scholar check
Metadata
Show full item recordAbstract
A novel, one-step, wet-free, environmental friendly and high-yield method for producing few-layer graphene powders with large surface areas (up to 800 m2/g) and narrow nanopore sizes (0.7–0.8 nm) using plasma-induced exfoliation of natural graphite is presented. Advanced characterization techniques were employed, including scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction and N2 gas adsorption/desorption measurements at 77 K, to investigate the morphological, elemental, structural and textural/porosity properties of these nanomaterials. Fully reversible H2 gas adsorption/desorption isotherms with maximum gravimetric capacities of up to ∼2 wt.% at 77 K and ∼60 bar are reported here. The H2 storage performance at 77 K is well correlated with certain textural features such as specific surface area and microporosity. The results of this work provide a valuable feedback for further research on plasma-processed graphene-based materials towards efficient H2 storage via cryo-adsorption. •Few-layer graphene-like flakes were prepared by plasma-processing of natural graphite.•Demonstrated large surface areas (up to 800 m2/g) and nanopore sizes (below 0.8 nm).•Characterization was performed using SEM, TEM, XPS, XRD and N2 porosimetry methods.•H2 storage behavior was evaluated by adsorption/desorption at 77 K and up to 100 bar.•Reversible H2 adsorption isotherms with maximum uptake of up to ∼2 wt.% at ∼60 bar.