Hydrogen storage of multi-walled carbon nanotubes obtained by decomposition of hydrocarbon over Ni-Li/SiO2.
Hydrogen storage into multi-walled carbon nanotubes obtained by the decomposition of hydrocarbons using Ni-Li/SiO2 was investigated. The optimized reaction conditions for the synthesis of carbon nanotubes were 873K and W/F=40 g-cat.h/mol, and carbon nanotubes obtained by C2H6 decomposition were found to exhibit fairly large H2 storage capacity of 1 wt% at room temperature. The storage capacity increased with decreasing temperature and a capacity of 5 wt% was achieved at 77K, with 66% of adsorbed hydrogen being desorbable. Hydrogen adsorption by pi orbital in C-C bond coordination is proposed, observing both weakened Raman adsorption C-C peaks and the thermal release of CH4 after H2 storage.
Ishihara
Tatsumi
T
Department of Applied Chemistry, Faculty of Engineering, Oita University, Dannoharu, Oita, Japan. ishihara@cstf.kyushu-u.ac.jp
Kamimura
Mitsuhiro
M
Yasuda
Isamu
I
Nishiguchi
Hiroyasu
H
Takita
Yusaku
Y
D000327:Adsorption; D002244:Carbon; D004736:Energy-Generating Resources; D006859:Hydrogen / Q000032:analysis / Q000737:chemistry*; D008094:Lithium / Q000737:chemistry; D036103:Nanotechnology; D009532:Nickel / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry
D002244:Carbon; D012822:Silicon Dioxide; D009532:Nickel; D006859:Hydrogen; D008094:Lithium