Modified carbon nanotubes for hydrogen storage at moderate pressure and room temperature

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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Room Temperature Electrochemical Opening of Carbon Nanotubes Followed by Hydrogen Storage

Advanced Materials ◽

10.1002/adma.200390010 ◽

2003 ◽

Vol 15 (1) ◽

pp. 55-57 ◽

Cited By ~ 45

Author(s):

J.M. Skowroński ◽

P. Scharff ◽

N. Pfänder ◽

S. Cui

Keyword(s):

Carbon Nanotubes ◽

Hydrogen Storage ◽

Room Temperature

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Room temperature hydrogen storage in defective single-walled carbon nanotubes: a molecular dynamics study

Letters on Materials ◽

10.22226/2410-3535-2021-3-321-326 ◽

2021 ◽

Vol 11 (3) ◽

pp. 321-326

Author(s):

Mohit Garg ◽

Sarbani Ghosh ◽

Venkat Padmanabhan

Keyword(s):

Carbon Nanotubes ◽

Molecular Dynamics ◽

Hydrogen Storage ◽

Room Temperature ◽

Single Walled Carbon Nanotubes ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

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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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Surface-Modified Carbon Nanotubes for Enhanced Ammonia Gas Sensitivity at Room Temperature

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2019.16725 ◽

2019 ◽

Vol 19 (11) ◽

pp. 7447-7451 ◽

Cited By ~ 1

Author(s):

Truong Duong Vu ◽

Tu Nguyen Cong ◽

Bac Luong Huu ◽

Chien Nguyen Duc ◽

Lam Nguyen Huu

Keyword(s):

Carbon Nanotubes ◽

Noble Metals ◽

Room Temperature ◽

Chemical Vapor ◽

Electron Beam Evaporation ◽

Metallic Surface ◽

Gas Sensitivity ◽

Ammonia Gas ◽

Surface Modified ◽

Modified Carbon Nanotubes

By electron beam evaporation, noble metals (Au, Co, Pt, and Ag) with 2 and 4 nm nominal thicknesses were coated onto multi-walled carbon nanotube layers. The metals were in the form of nanoparticles mounted onto the side walls of carbon nanotubes (CNTs) to create a metal/CNT junction. The CNTs were directly grown on patterned Pt-electrode alumina substrates through chemical vapor deposition to produce a resistivity-based ammonia gas sensor. The metallic surface-modified CNT-based sensors were found sensitive to NH3 gas at room temperature. Compared with pristine CNT sensor, the response of Au/CNTs sensor increased slightly, whereas the responses of the Pt/CNTs, Co/CNTs, and Ag/CNTs increased by two, three, and more than four times, respectively.

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