Jump to main content
Jump to site search

Issue 20, 2014
Previous Article Next Article

Synthesis and exceptional thermal stability of Mg-based bimetallic nanoparticles during hydrogenation

Author affiliations

Abstract

Here we report the extraordinary thermal stability of Mg rich bimetallic nanoparticles (NPs), which is important for hydrogen storage technology. The enhanced NP stability is accomplished because of two critical improvements: (i) no void development within NPs (nanoscale Kirkendall effect) during their formation and (ii) suppressed Mg evaporation and NP hollowing during Mg hydrogenation at elevated temperature. The mechanism leading to the improved thermal stability of Mg-based bimetallic NPs is shown to be due to MgH2 hydride formation before evaporation can take place. These findings were tested for various compositions of Mg with Ni, Cu, and Ti, which are interesting combinations of materials for hydrogen storage systems. To achieve this we first demonstrate the synthesis mechanism of Mg–Ni and Mg–Cu NPs, which is well controlled at the single particle level, in order to accomplish multi-shell, alloy and intermetallic structures of interest for hydrogen storage tests. Aberration corrected transmission electron microscopy was carried out to unravel the detailed atomic structure and composition of the bimetallic NPs after production, processing, and hydrogenation. Finally, a simple and effective methodology is proposed for tuning the composition of the Mg-based bimetallic NPs based on the temperature-dependent nucleation behavior of NPs in the gas-phase.

Graphical abstract: Synthesis and exceptional thermal stability of Mg-based bimetallic nanoparticles during hydrogenation

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Jul 2014, accepted on 07 Aug 2014 and first published on 11 Aug 2014


Article type: Paper
DOI: 10.1039/C4NR03885A
Author version
available:
Download author version (PDF)
Citation: Nanoscale, 2014,6, 11963-11970
  • Open access: Creative Commons BY license
  •   Request permissions

    Synthesis and exceptional thermal stability of Mg-based bimetallic nanoparticles during hydrogenation

    G. Krishnan, R. F. Negrea, C. Ghica, G. H. ten Brink, B. J. Kooi and G. Palasantzas, Nanoscale, 2014, 6, 11963
    DOI: 10.1039/C4NR03885A

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements