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Water-Soluble Iridium-NHC-Phosphine Complexes as Catalysts for Chemical Hydrogen Batteries Based on Formate

Authors

  • Dr. Henrietta Horváth,

    Corresponding author
    1. MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)
    • MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)

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  • Dr. Gábor Papp,

    Corresponding author
    1. MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)
    • MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)

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  • Roland Szabolcsi,

    1. Department of Physical Chemistry, University of Debrecen, P.O. Box 7, 4010 Debrecen (Hungary)
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  • Dr. Ágnes Kathó,

    1. Department of Physical Chemistry, University of Debrecen, P.O. Box 7, 4010 Debrecen (Hungary)
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  • Prof. Ferenc Joó

    Corresponding author
    1. MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)
    2. Department of Physical Chemistry, University of Debrecen, P.O. Box 7, 4010 Debrecen (Hungary)
    • MTA-DE Homogeneous Catalysis and Reaction Mechanisms Research Group, P.O. Box 7, 4010 Debrecen (Hungary)

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Abstract

Molecular hydrogen, obtained by water electrolysis or photocatalytic water splitting, can be used to store energy obtained from intermittent sources such as wind and solar power. The storage and safe transportation of H2, however, is an open and central question in such a hydrogen economy. Easy-to-synthesize, water-soluble iridium-N-heterocyclic carbene-phosphine (IrI-NHC-phosphine) catalysts show unprecedented high catalytic activity in dehydrogenation of aqueous sodium formate. Fast reversible generation and storage of hydrogen can be achieved with these catalysts by a simple decrease or increase in the hydrogen pressure, respectively.

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