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.
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