NDLI: Preparation of graphene-supported highly dispersed nickel nanoparticles for the improved generation of hydrogen from ball-milled LiBH<sub>4</sub>

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Catalysis Science & Technology Vol - 5 Issue - 2

Catalysis Science & Technology Vol -4

Catalysis Science & Technology Vol -3

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Preparation of graphene-supported highly dispersed nickel nanoparticles for the improved generation of hydrogen from ball-milled LiBH₄

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Wenchang Xu, Juan Meng, Rongrong Chen, Zhidong Li, Yang Cao, Jianyu
Copyright Year	2015
Abstract	Using a hydrogen thermal reduction method, highly dispersed nickel nanoparticles (ca. 9.7 nm) were uniformly supported on graphene (Ni/G), and then ball-milled with LiBH4 to investigate in depth their hydrogen storage behaviour. The Ni/G-doped system exhibited high gravimetric hydrogen capacity, excellent rehydrogenation reversibility and rapid kinetics, due to the synergistic effect of nanoconfinement in graphene and catalysis by Ni nanoparticles, demonstrating a promising strategy for the effective design of hydrogen storage materials using LiBH4. In the case of doping with 20 wt.% Ni/G, thermal dehydrogenation of LiBH4 began around 180 °C, and the main hydrogen release peaks occurred at 275 and 465 °C, with a total weight loss of 15.2 wt.%. At 450 °C, about 12.8 wt.% hydrogen was desorbed in 45 min. More importantly, the hydrogen released during a second dehydrogenation remained at 12.6 wt.%, and a steady hydrogen capacity of ca. 9.8 wt.% was achieved during the thirtieth hydrogen uptake–release cycle under 3 MPa H2 at 400 °C, demonstrating the effectiveness of the Ni/G catalyst in the reversibility of hydrogen uptake of LiBH4 at relatively lower temperatures and pressure. During this process LiBH4 was re-formed and a new product, Li2B12H12, was detected following rehydrogenation.
Starting Page	1821
Ending Page	1828
Page Count	8
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	5
Issue Number	3
Journal	Catalysis Science & Technology
DOI	10.1039/c4cy01276c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Hydrogen storage Graphene Dehydrogenation Dopant Nickel
Content Type	Text
Resource Type	Article
Subject	Catalysis

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