Agent-free synthesis of graphene oxide/transition metal oxide composites and its application for hydrogen storage

Won G. Hong, Byung Hoon Kim, Sang Moon Lee, Han Young Yu, Yong Ju Yun, Yongseok Jun, Jin Bae Lee, Hae Jin Kim

Research output: Contribution to journalArticle

63 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)7594-7599
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number9
DOIs
Publication statusPublished - 2012 May
Externally publishedYes

Keywords

  • Dehydration reaction
  • Graphene oxide
  • Hydrogen storage
  • Transition metal oxide
  • Wrapping

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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