Journal of Materials Science

, Volume 42, Issue 10, pp 3367–3372 | Cite as

Effects of nickel foam dimensions on catalytic activity of supported Co–Mn–B nanocomposites for hydrogen generation from stabilized borohydride solutions

  • Mario MitovEmail author
  • Rashko Rashkov
  • Nikolay Atanassov
  • Andreas Zielonka
Size-Dependent Effects


In the present work, the catalytic activity of electrodeposited Co–Mn–B nanocomposites towards controllable hydrolysis of sodium borohydride was studied. Deposition was performed on two types of Ni-foam (RECEMAT Int.) with different pore size, specific surface area and thickness. Higher deposit loading, as well as bigger real surface area, was obtained with foam samples possessing bigger pore size. The catalyst deposited on bigger pore foam promoted hydrogen generation with higher rates than the other one when contacted with a base-stabilized NaBH4 solution. The same activation energy value, however, was determined for both supported catalysts. On the base of the obtained results, it may be concluded that the geometric factor plays predominant role for the catalytic activity of studied catalysts.


Foam Sodium Borohydride Hydrogen Generation Metal Foam Hydrogen Release 



This work is supported by the Research Fund of South-West University “Neofit Rilsky”—Blagoevgrad and the Deutsche Forschungsgemeinschaft (DFG) within a joint research project between the Institute of Physical Chemistry of BAS, Bulgaria and the Forschungsinstitut fűr Edelmetalle und Metallchemie, Germany.


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Mario Mitov
    • 1
    Email author
  • Rashko Rashkov
    • 2
  • Nikolay Atanassov
    • 2
  • Andreas Zielonka
    • 3
  1. 1.Department of ChemistrySouth-West University “Neofit Rilsky”BlagoevgradBulgaria
  2. 2.Institute of Physical Chemistry – BASSofiaBulgaria
  3. 3.Research Institute for Noble Metals and Chemistry of MetalsSchwaebisch GmuendGermany

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