Revealing the Role of Defects in Graphene Oxide on Evolution of Magnesium Nanocrystals and the Resulting Effects on Hydrogen Storage

Author(s):  
Dong Ju Han ◽  
Sangtae Kim ◽  
Eun Seon Cho

The hydrogen storage properties of magnesium (Mg) considerably rely on the size and morphology of Mg particles that determine the diffusion path for hydrogen atoms. Despite the intensive research on...

2015 ◽  
Vol 40 (21) ◽  
pp. 6844-6852 ◽  
Author(s):  
Nikolaos Kostoglou ◽  
Vasilios Tzitzios ◽  
Athanassios G. Kontos ◽  
Konstantinos Giannakopoulos ◽  
Christos Tampaxis ◽  
...  

2016 ◽  
Vol 852 ◽  
pp. 835-840 ◽  
Author(s):  
Tian Bao Yang ◽  
Li Xian Sun ◽  
Fen Xu ◽  
Zi Qiang Wang

Metal-organic frameworks (MOFs: copper containing CuBTC)-graphene oxide (GO) composite (CG) was synthesized using microwave heating. The parent material and the composite were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), nitrogen sorption, scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (HRTEM) and Raman spectroscopy. Then their hydrogen storage properties were systematically tested. The composite material CG shows a remarkable H2 capacity up to 2.43 wt% (28.6% increases vs. CuBTC) and higher surface area and pore volume compared to the neat CuBTC. And the particle size of CG is down to nanometer scale.


1998 ◽  
Vol 553 ◽  
Author(s):  
K. F. Kelton

AbstractMost common in Al-3d transition metal(TM) alloys, icosahedral quasicrystals (i-phase) are also found frequently in Ti/Zr-TM alloys. The Ti-TM-Si-O quasicrystals are metastable, produced only by rapid quenching, and are extremely disordered. In contrast, Ti-Zr-Ni i-phases are well ordered and stable, produced by relatively low temperature annealing, nearly 300°C below the melting temperature. Important for both basic and practical reasons, Ti/Zr-based quasicrystals can absorb significant quantities of hydrogen, up to two hydrogen atoms for each metal atom. The formation and structures of these quasicrystals and closely related complex crystal phases are discussed. The hydrogenation properties of these quasicrystals are presented and shown to be competitive with materials in current use for hydrogen storage and battery applications. Results from recent studies using hydrogen as a probe of the local structure of the quasicrystal and crystal approximant are presented.


2015 ◽  
Vol 40 (39) ◽  
pp. 13506-13517 ◽  
Author(s):  
Luisa Fernández Albanesi ◽  
Sebastiano Garroni ◽  
Pierre Arneodo Larochette ◽  
Pau Nolis ◽  
Gabriele Mulas ◽  
...  

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