SYNTHESIS AND CHARACTERIZATION OF CMK-3 WITH V AND Ni SPECIES AS NEW SPONGE FOR HYDROGEN STORAGE

JULIANA M. JUÁREZ; MARCOS B. GÓMEZ COSTA; OSCAR A. ANUNZIATA

Cesme

Congreso; International Porous and Powder Materials Symposium and Exhibition (PPM 2015); 2015

Ordered porous carbon designated as CMK-3 was synthesized by replication from SBA-15 silica, and then was modified with metals in order to gain a higher hydrogen storage capacity. Our goal was to evaluate the hydrogen storage capacities of CMK-3 replica modified with Ni and V nanospecies. The approach includes synthesis and characterization of carbon modified nanostructures along with experimental study of their adsorption capacity and storage properties. The samples were characterized by XRD, FTIR, SEM, TEM, XPS, NMR-MAS and BET methods. V-CMK-3 was prepared by wetness impregnation using VCl3 as Vanadium source and Ni-CMK-3 was prepared by the same method using NiCl2 as Nickel source. Measurements of hydrogen adsorption at cryogenic temperatures (77K) and different pressures (0- 10bar) were performed. The nanoparticles of V incorporated onto the nanostructured carbon CMK-3 showed higher hydrogen uptake at low and high pressures than CMK-3. (3.4 wt% and 2.2 wt% respectively of H2 sorption at 10 bar and 77 K). In the case of Ni-CMK-3 showed higher hydrogen uptake the CMK-3 pristine, but lower than V-CMK-3. (2.5 wt% H2 sorption at 10 bar and 77 K). We can conclude this work indicating that CMK-3 hydrogen storage capacity was increase by addition of metal clusters.