A Reversible Nanoconfined Chemical Reaction

Summary, in English

Hydrogen is recognized as a potential, extremely interesting energy carrier system, which can facilitate efficient utilization of unevenly distributed renewable energy. A major challenge in a future "hydrogen economy" is the development of a safe, compact, robust, and efficient means of hydrogen storage, in particular, for mobile applications. Here we report on a new concept for hydrogen storage using nanoconfined reversible chemical reactions. LiBH4 and MgH2 nanoparticles are embedded in a nanoporous carbon aerogel scaffold with pore size D-max similar to 21 nm and react during release of hydrogen and form MgB2. The hydrogen desorption kinetics is significantly improved compared to bulk conditions, and the nanoconfined system has a high degree of reversibility and stability and possibly also improved thermodynamic properties. This new scheme of nanoconfined chemistry may have a wide range of interesting applications in the future, for example, within the merging area of chemical storage of renewable energy.

• Författare: Thomas K. Nielsen; Ulrike Boesenberg; Rapee Gosalawit; Martin Dornheim; Yngve Cerenius; Flemming Besenbacher; Torben R. Jensen
• Avdelning/ar: MAX IV-laboratoriet
• Publiceringsår: 2010
• Språk: Engelska
• Sidor: 3903-3908
• Publikation/Tidskrift/Serie: ACS Nano
• Volym: 4
• Issue: 7
• Länkar: http://dx.doi.org/10.1021/nn1006946
• Dokumenttyp: Artikel i tidskrift
• Förlag: The American Chemical Society (ACS)
• Ämne: Nano Technology
• Nyckelord: lithium; hydrogen storage; nanoconfinement; reactive hydride composite; borohydride; magnesium hydride
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 1936-086X