Ordered mesoporous carbons (OMC) type CMK-3 modified with Vandium for improvement H2 storage

Abstract

Some previous studies probed that H2 adsorption can be improved for mesoporous carbons introducing into the framework of the nanomaterial some metals or oxides, like platinum, Zn, ZnO, Ni, NiO, or TiO2. Some other authors have made several efforts in the same direction, for instance, incorporated iron and copper nanoparticles into multiwalled carbon nanotubes and studied their hydrogen adsorption. In this work we studied the influence of the incorporation of vanadium nanoparticles inside the channels of mesoporous carbon CMK-3. This research includes the synthesis of the mesoporous silicate, (hard Template) and the synthesis of the CMK-3 by nanocasting strategy and the incorporation of the vanadium nanoclusters by wetness impregnation. This kind of materials are synthesize by nanocasting strategy using mesoporous silicates as templates and have high surface area (from 1000 to 2000 m2/g) and pore volumes in the range of 0.5 to 1 ml.g-1. Accordingly, CMK-3 was chosen as a support material for hydrogen storage due to its large surface area, high chemical stability, uniform pore diameter, accessible porosity and threedimensional conducting network. The characterization of these nanomaterials was obtained by XRD, N2 adsorption, XPS, TPR and Uv-Vis, TEM, and finally the study of the improvement in the hydrogen adsorption. V5+ cation in V2O5 is an active species to uptake and store hydrogen by a physisorption process and the support plays an important role in metal cluster dispersion and size.