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Jun, Yongseok
Lab for Solar innovation
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Agent-free synthesis of graphene oxide/transition metal oxide composites and its application for hydrogen storage

Cited 18 times inthomson ciCited 14 times inthomson ci
Title
Agent-free synthesis of graphene oxide/transition metal oxide composites and its application for hydrogen storage
Author
Hong, Won G.Kim, Byung HoonLee, Sang MoonYu, Han YoungYun, Yong JuJun, YongseokLee, Jin BaeKim, Hae Jin
Keywords
Dehydration reactions; Graphene oxides; Hydrogen adsorption; Hydrogen storage capacities; Liquid nitrogen temperature; Metal oxide composite; TiO; Transition-metal oxides; Transmission electron microscopy (TEM)
Issue Date
201205
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.9, pp.7594 - 7599
Abstract
Graphene oxide (GO) wrapped transition metal oxide composite materials were synthesized by a very simple route without any additional agents and the hydrogen adsorption properties of the materials were investigated. The morphologies of GO/V2O5 and GO/TiO2 were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that single- or few-layered GO sheets wrapped throughout the V2O5 and TiO2 particles. According to X-ray photoelectron spectroscopy (XPS), the C-OH species of GO and the surface-adsorbed oxygen of the transition metal oxide bond together via a dehydration reaction. The wrapping phenomenon of GO causes the enhancement of hydrogen storage capacity at liquid nitrogen temperature (77 K) compared with those of the pristine transition metal oxides and GO. The enhancement of hydrogen storage capacity of GO-wrapped transition metal oxide composite materials results from the existence of interspaces between the transition metal oxide particles and the thin GO layers.
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DOI
http://dx.doi.org/10.1016/j.ijhydene.2012.02.010
ISSN
0360-3199
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