Abstracts Book - IMRC 2018

• SC2-P006
NANOCLUSTERS OF VANADIUM OXIDE INCLUDED IN HYBRID
NANOSTRUCTURED MATERIALS USE AS HYDROGEN STORAGE
MATERIAL
Juliana Maria Juarez 1 , Marcos B. Gómez Costa 1 , M. Laura Martinez 1 , Oscar Anunziata 1
1 Universidad Tecnológica Nacional, Nanotec, Argentina.
In this work we studied the influence of the incorporation of vanadium oxide
nanoparticles inside the channels of two different supports such as the
mesoporous silicate SBA-15 and into the mesoporous carbon CMK-3. This
research includes synthesis of the mesoporous silicate and synthesis of CMK-3
by nanocasting strategy, incorporation of the vanadium nanoclusters by
wetness impregnation, characterization of these nanomaterials by XRD, N2
adsorption, XPS, TPR and UV-Vis, TEM, and study of the improvement in
hydrogen adsorption. This material is promising in hydrogen adsorption and
storage application for energy harvesting.
The materials with vanadium oxide nanoclusters (VxOy-SBA-15 and VxOy-CMK-
3) were successfully synthesized and characterized by X-ray diffraction, Textural
properties, UV–Vis–DRS, X-Ray Photoelectron Spectroscopy, Temperature
Programmed Reduction and Transmission Electron Microscopy analyses. VxOy-
SBA-15 and VxOy-CMK-3 improved significantly the H2 storage behavior (1.33
wt.% and 3.43 wt.% at 77K and 10 bar) compared with their respective supports
SBA-15 and CMK-3.
The hydrogen sorption onto SBA-15 was smaller than vanadium oxide samples
in a close factor by two; when vanadium was added, hydrogen uptake increased.
A similar behavior was found with carbon materials; yet, the amount of H2
adsorption molecules was more important than that found in siliceous
materials.
V2O5 nanoclusters increased the capacity of hydrogen adsorption in pristine
materials. The importance lies in the V 5+ metal cation is the main component
that increased the adsorption capacity of these materials.
Supposing that weakly orbital interactions occur between H2 and the metal
nanocluster, physisorption is the main interaction, all cases have the potential
to uptake H2 weakly as physisorption process and the last interaction achieves