Research Article
Characterization and Hydrogen Storage of Surface-Modified Multiwalled Carbon Nanotubes for Fuel Cell Application
Table 1
Comparison of literatures and the present work on the hydrogen adsorption capacity of Ti-doped NaAlH4 or Ti-NaAlH4-doped CNTs composites.
| | Samples | Adsorption conditions | H2 adsorption capacity (wt%) |
| | NaAlH4 + 3 mol% Ti + 1 mol% Fe [29] | 473 K and 1 atm | 4.3 | | NaAlH4 + 4 mol% Ti [25] | 423 K and 1 atm | 3.5 | | NaAlH4 + 2 mol% Ti + 5 wt% Al + 10 wt% MWCNTs (SWCNTs) [54] | 473 K and 1 atm | 3.9 (4.2) | | NaAlH4 + 8 mol% MWCNTs [31] | 433 K and 1 atm | 4.2 | | TiO2-doped MWCNTs [51] | 298 K and 18 atm | 0.4 | | Ti-coated SWCNTs [55] (first-principle total-energy calculations) | 200–900 K and 1 atm | 5.0–8.0 | | 4 wt% Ti-NaAlH4 + 5 wt% MWCNTs (this work) | 425 K and 30 atm | 3.8 |
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