Ammonia-free infiltration of NaBH4 into highly-ordered mesoporous silica and carbon matrices for hydrogen storage

• Published in: Journal of alloys and compounds Vol. 580; pp. S309 - S312
• Main Authors: Peru, F., Garroni, S., Campesi, R., Milanese, C., Marini, A., Pellicer, E., Baró, M.D., Mulas, G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier B.V 15.12.2013; Elsevier
• Subjects: Adsorbents; Chemistry; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; General and physical chemistry; Hydrogen absorbin materials; Materials science; Materials synthesis; materials processing; Methods of nanofabrication; Nanofabrications; Nanostructured materials; Physics; Sol-gel processes; Solubility, segregation, and mixing; phase separation; Surface physical chemistry; Transmission Electron Microscopy, TEM; X-ray diffraction; Sol-gel processes; X-ray diffraction; Nanofabrications; Nanostructured materials; Transmission Electron Microscopy, TEM; Hydrogen absorbin materials; Hydrogen storage; TDS; Solubility; Desorption; Inorganic adsorbent; Carbon; X ray diffraction; Porous material; Mesoporosity; Ammonia; Nanofabrication; Transmission electron microscopy; Sol gel process; Infiltration; Nanotechnology; Nanomaterial synthesis
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.02.141

► Highly ordered mesoporous SBA-15 and CMK3 matrices were prepared. ► Confinement of NaBH4 into SBA-15 and CMK3 was performed by NH3-free wet infiltration. ► Success in the confinement of NaBH4 was proved by XRD and TEM. ► Confined NaBH4 shows lower H2 desorption temperature with respect to literature data. In this work we focused on nanoconfinement of NaBH4 into highly-ordered Si-based mesoporous scaffold and its carbon replica by ammonia-free wet chemical impregnation. Structural and morphological characterization, performed by X-ray diffraction and transmission electron microscopy enabled us to confirm the effectiveness infiltration procedure. Desorption properties tested by temperature programmed desorption analyses highlighted a noticeable shift towards lower temperature compared to both bulk material and samples of similar systems referred to in the bibliographical data.