Optimization of the pore structure of nickel/graphite hybrid materials for hydrogen storage

✍ Scribed by Byung-Joo Kim; Soo-Jin Park

• Book ID: 103832823
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 358 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.09.097

✦ Synopsis

Nickel/graphite hybrid materials were prepared by mixed acid treatment of graphite flakes, following metal nanoparticle deposition. The textural properties were studied by BET surface area measurement and t-plot methods with N 2 /77 K adsorption isotherms. The hydrogen storage characteristics of the nickel/graphite at 298 K and 10 MPa were studied using a pressureecompositionetemperature apparatus. The pore structure of the materials was studied as a function of processing conditions. In the optimum material, the hydrogen storage capacity was as high as 4.48 wt.%. The total amount of storage was not proportional to the specific surface area or metal content of the adsorbate. A dipole-induced model on nickel/carbon surfaces is proposed for the hydrogen storage mechanism.