Sorption of hydrogen onto titanate nanotubes decorated with a nanostructured Cd 3[Fe(CN) 6] 2 Prussian Blue analogue

A. A. Al-Hajjaj, B. Zamora, D. V. Bavykin, A. A. Shah, F. C. Walsh, E. Reguera

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Nanostructured films of cadmium hexacyanoferrate (III), Cd 3[Fe(CN) 6] 2 have been deposited on the surface of titanate nanotubes (TiNT) by ion exchange with CdSO 4, followed by reaction with K 3[Fe(CN) 6] in an aqueous suspension. The composite demonstrates a significantly higher hydrogen storage uptake than pure Cd 3[Fe(CN) 6] 2 and TiNT. At a temperature of 77 K and a pressure 100 bar, the hydrogen uptake for the composite is approximately 12.5 wt %, whereas only 4.5 wt % and 4 wt % are achieved for the TiNT and Cd 3[Fe(CN) 6] 2 respectively. Electron microscopy and infrared spectroscopy show that Cd 3[Fe(CN) 6] 2 is uniformly distributed on the surface of the nanotubes forming a discontinuous nanostructured film with a well developed interface, which allows efficient interaction with the support. The possible reasons for the high uptake of hydrogen in the composite are discussed.

Original languageEnglish
Pages (from-to)318-326
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number1
DOIs
StatePublished - Jan 2012
Externally publishedYes

Keywords

  • Cadmium hexacyanoferrate
  • Ferricyanide
  • High pressure
  • Hydrogen storage
  • Titanate nanotubes

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