Synthesis and Characterization of a Novel CMK-3 with Fe Species as New Sponge for Hydrogen Storage

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

Izmir

Simposio; International Porous and Powder Materials Symposium and Exhibition (PPM 2017); 2017

PPM

The aim of this work is to synthesize a nanostructured Carbon CMK-3 modified with Fe in order to increase its capacity in hydrogen storage. Ordered mesoporous carbon CMK-3 was synthesized via a two-step impregnation of the SBA-15 with a solution of sucrose using an incipient wetness method. The composite was heated at 1173 K for 4 h under nitrogen flow. The silica template was dissolved with 5 wt% HF. Fe-CMK-3 was prepared by wetness impregnation using FeCl3.6H2O as source of Fe. A solution of FeCl3.6H2O in ethanol was mixed to carbon solution. The solution was placed in a rotary evaporator to remove excess of ethanol at about 333K and 60 rpm. Afterwards, the sample was dried at 373K for 18 h. and was thermally treated in a dynamic inert atmosphere. The percentage of Fe has been 2 wt% with respect to carbon in the final Fe-CMK-3. Porous carbon CMK-3 and the sample modified with Fe were characterized by XRD, FTIR, XPS, BET, TEM and SEM. Measurements of H2 adsorption at cryogenic temperatures and low pressures were performed. The Fe-CMK-3 showed higher hydrogen uptake than CMK-3, (4.5 wt% and 2.2 wt% respectively of H2 sorption at 10 bar and 77 K).