Influence of nickel nanoparticles on hydrogen storage behaviors of MWCNTs

• Published in: Applied surface science Vol. 415; pp. 85 - 89
• Main Authors: Han, Ye-Ji, Park, Soo-Jin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2017
• Subjects: Hydrogen storage; Multiwalled carbon nanotube; Nickel; Spillover; Hydrogen storage; Nickel; Spillover; Multiwalled carbon nanotube
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2016.12.108

[Display omitted] •The hydrogen adsorbents were prepared using nickel impregnation from MWCNTs for hydrogen storage.•The hydrogen storage capacities were improved through the spillover effect of nickel nanoparticles.•The hydrogen storage capacity of CNT/Ni-10 (0.87wt.%) is comparable to other hydrogen adsorbent at 298K and 100bar. In this study, multiwalled carbon nanotube (CNT)-nickel hybrid materials were prepared from CNTs by the impregnation of nickel at various CNT/nickel mass ratios. The presence of nickel nanoparticles on CNTs influences the spillover effect on hydrogen storage capacity. A thermal reduction method was employed to increase the contacts between the nickel metal particles and the carbon support, thus facilitating hydrogen spillover. The as-obtained nickel-decorated CNTs exhibited a high hydrogen storage capacity of 0.87wt.% at 298K and 100bar, resulting in an enhancement factor of 2.5 relative to the untreated CNTs. These experimental results demonstrate that the presence of nickel creates hydrogen-favorable sites that can lead to improved hydrogen storage capacities based on the spillover effect.