Tuning Mg hydriding kinetics with nanocarbons

Efrat Ruse, Matat Buzaglo, Svetlana Pevzner, Ilan Pri-Bar, Vladimir M. Skripnyuk, Eugen Rabkin, Oren Regev

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Mg-nanocarbon composites demonstrate fast reversible hydriding kinetics. The kinetics is strongly correlated with the structure of the added nanocarbon allotrope. We conducted a systematic exploration of the reversible hydriding kinetics of Mg upon addition of nanocarbons with different dimensionalities, namely, 1D carbon nanotubes, 2D graphene nanoplatelets and 3D activated carbon. Our findings showed that the Mg (de)hydriding rate could be tuned by the dimensionality and defect density of the nanocarbon. The resulting kinetic enhancement was explained in terms of the hydrogen spillover mechanism. The use of nanocarbons offers an alternative to the utilization of high concentrations of expensive transition-metal catalysts for hydrogen storage.

Original languageEnglish
Pages (from-to)616-622
Number of pages7
JournalJournal of Alloys and Compounds
Volume725
DOIs
StatePublished - 1 Jan 2017

Keywords

  • Graphene
  • Hydrogen
  • Kinetics
  • Magnesium
  • Nanocarbon
  • Nanotubes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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