Neutron Scattering Methodology for Absolute Measurement of Room-Temperature Hydrogen Storage Capacity and Evidence for Spillover Effect in a Pt-Doped Activated Carbon

AbstractThe hydrogen adsorption capacity of various carbon nanostructures including single-wall carbon nanotubes, graphitic nanofibers, activated carbon, and graphite has been measured as a function of pressure and temperature. Our results show that at room temperature and a pressure of 80 bar the hydrogen storage capacity is less than 1 wt.% for all samples. Upon cooling, the capacity of hydrogen adsorption increases with decreasing temperature and the highest value was observed to be 2.9 wt. % at 50 bar and 77 K. The correlation between hydrogen storage capacity and specific surface area is discussed.

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Hydrogen Storage Behaviors of Ni-Loaded Activated Carbon Nanotubes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.695 ◽

2010 ◽

Vol 123-125 ◽

pp. 695-698 ◽

Cited By ~ 3

Author(s):

Seul Yi Lee ◽

Soo Jin Park

Keyword(s):

Carbon Nanotubes ◽

Activated Carbon ◽

Hydrogen Storage ◽

Storage Capacity ◽

Chemical Activation ◽

Spillover Effect ◽

Textural Properties ◽

Hydrogen Storage Capacity ◽

Ni Content ◽

Storage Characteristics

In this work, nickel (Ni)-loaded activated carbon nanotubes (ACNTs) were prepared for hydrogen storage applications. The process was conducted by chemical activation method at 900oC with KOH:CNTs ratios (4:1, g/g). And then, Ni-loaded ACNTs were also formulated to investigate the hydrogen storage characteristics as a function of Ni content. The microstructures of the Ni-loaded ACNTs were characterized by XRD and TEM measurements. The textural properties of the samples were analyzed using N2 adsorption isotherms at 77 K. The BET, D-R, and BJH equations were used to observe the specific surface areas, the micropore, and mesopore structures, respectively. The hydrogen storage capacity of the Ni-loaded ACNTs was measured at 298 K at a pressure of 100 bar. It was found that the hydrogen storage capacity of Ni-loaded ACNTs was enhanced in proportion to the Ni content, with Ni-5-ACNTs exhibiting the largest hydrogen storage capacity. Therefore, it could be concluded that the significantly created micropores on CNTs by chemical activation had an effect on hydrogen storage behaviors as well as the Ni particles played an important role in hydrogen storage characteristics due to the hydrogen spillover effect.

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High Hydrogen Storage Capacity of Porous Carbons Prepared by Using Activated Carbon

Journal of the American Chemical Society ◽

10.1021/ja8083225 ◽

2009 ◽

Vol 131 (20) ◽

pp. 7016-7022 ◽

Cited By ~ 354

Author(s):

Huanlei Wang ◽

Qiuming Gao ◽

Juan Hu

Keyword(s):

Activated Carbon ◽

Hydrogen Storage ◽

Storage Capacity ◽

Porous Carbons ◽

Hydrogen Storage Capacity ◽

High Hydrogen

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Enhanced room-temperature hydrogen storage capacity in Pt-loaded graphene oxide/HKUST-1 composites

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2013.11.109 ◽

2014 ◽

Vol 39 (5) ◽

pp. 2160-2167 ◽

Cited By ~ 69

Author(s):

Hu Zhou ◽

Xiaoqing Liu ◽

Jun Zhang ◽

Xiufen Yan ◽

Yuanjun Liu ◽

...

Keyword(s):

Graphene Oxide ◽

Hydrogen Storage ◽

Room Temperature ◽

Storage Capacity ◽

Hydrogen Storage Capacity

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Hydrogen storage capacity of selected activated carbon electrodes made from brown coal

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2016.10.112 ◽

2016 ◽

Vol 41 (48) ◽

pp. 23099-23108 ◽

Cited By ~ 11

Author(s):

Amandeep Singh Oberoi ◽

John Andrews ◽

Alan L. Chaffee ◽

Lachlan Ciddor

Keyword(s):

Activated Carbon ◽

Hydrogen Storage ◽

Brown Coal ◽

Storage Capacity ◽

Carbon Electrodes ◽

Hydrogen Storage Capacity

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Hydrogen Storage in Carbon Nanotubes Prepared by Using Copper Nanoparticles as Catalyst

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.251.342 ◽

2012 ◽

Vol 251 ◽

pp. 342-345 ◽

Cited By ~ 5

Author(s):

Jin Chen ◽

Xiao Gang Wang ◽

Hai Yan Zhang

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Storage ◽

Copper Nanoparticles ◽

Room Temperature ◽

Storage Capacity ◽

Dissociative Adsorption ◽

Electrochemical System ◽

Hydrogen Storage Capacity ◽

Structure Phase ◽

Fundamental Understanding

carbon nanotubes were synthesized by pyroysis method using copper nanoparticles as catalyst. The structure, phase composition and hydrogen storage capacity were investigated by TEM, XRD spectra and Electrochemical System. The results show that the diameter of carbon nanotubes is 200-500nm, The P-C-T curve of adsorbing hydrogen of samples was measured in the pressure up to 12 MPa at room temperature. we show that a SWNT can strongly adsorb up to 8-wt% hydrogen. These results advance our fundamental understanding of dissociative adsorption of hydrogen in nanostructures and suggest new routes to better storage and catalyst materials.

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