Catalytic mechanism of transition-metal compounds on Mg hydrogen sorption reaction.
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Catalytic mechanism of transition-metal compounds on Mg hydrogen sorption reaction.
J Phys Chem B Condens Matter Mater Surf Interfaces Biophys. 2006 Jun 8;110(22):11020-4
Authors: Barkhordarian G, Klassen T, Bormann R
The catalytic mechanisms of transition-metal compounds during the hydrogen sorption reaction of magnesium-based hydrides were investigated through relevant experiments. Catalytic activity was found to be influenced by four distinct physico-thermodynamic properties of the transition-metal compound: a high number of structural defects, a low stability of the compound, which however has to be high enough to avoid complete reduction of the transition metal under operating conditions, a high valence state of the transition-metal ion within the compound, and a high affinity of the transition-metal ion to hydrogen. On the basis of these results, further optimization of the selection of catalysts for improving sorption properties of magnesium-based hydrides is possible. In addition, utilization of transition-metal compounds as catalysts for other hydrogen storage materials is considered.
PMID: 16771356 [PubMed - in process]
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