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A Reversible Nanoconfined Chemical Reaction

På svenska

Author

  • Thomas K. Nielsen
  • Ulrike Boesenberg
  • Rapee Gosalawit
  • Martin Dornheim
  • Yngve Cerenius
  • Flemming Besenbacher
  • Torben R. Jensen

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.

Department/s

Publishing year

2010

Language

English

Pages

3903-3908

Publication/Series

ACS Nano

Volume

4

Issue

7

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Nano Technology

Keywords

  • lithium
  • hydrogen storage
  • nanoconfinement
  • reactive hydride composite
  • borohydride
  • magnesium hydride

Status

Published

ISBN/ISSN/Other

  • ISSN: 1936-086X