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Reversible Interconversion between 2,5‐Dimethylpyrazine and 2,5‐Dimethylpiperazine by Iridium‐Catalyzed Hydrogenation/Dehydrogenation for Efficient Hydrogen Storage


A new hydrogen storage system based on the hydrogenation and dehydrogenation of nitrogen heterocyclic compounds, employing a single iridium catalyst, has been developed. Efficient hydrogen storage using relatively small amounts of solvent compared with previous systems was achieved by this new system. Reversible transformations between 2,5‐dimethylpyrazine and 2,5‐dimethylpiperazine, accompanied by the uptake and release of three equivalents of hydrogen, could be repeated almost quantitatively at least four times without any loss of efficiency. Furthermore, hydrogen storage under solvent‐free conditions was also accomplished.

Speichermodul: Ein neues System für die effiziente Wasserstoffspeicherung basiert auf der reversiblen Hydrierung und Dehydrierung von 2,5‐Dimethylpyrazin und 2,5‐Dimethylpiperazin katalysiert durch einen einzelnen Iridiumkomplex. Die reversible Transformation, die mit der Aufnahme und Freisetzung von drei Äquivalenten Wasserstoff einhergeht, konnte mindestens viermal fast quantitativ ohne Effizienzverlust durchgeführt werden.

Authors:   Ken‐ichi Fujita, Tomokatsu Wada, Takumi Shiraishi
Journal:   Angewandte Chemie
Year:   2017
Pages:   n/a
DOI:   10.1002/ange.201705452
Publication date:   27-Jul-2017
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