Development of a practical formate/bicarbonate energy system

Rui Sang, Carolin Amber Martina Stein, Thomas Schareina, Yuya Hu, Alexander Léval, Jonas Massa, Volkan Turan, Peter Sponholz, Duo Wei (), Ralf Jackstell (), Henrik Junge () and Matthias Beller ()
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Rui Sang: Leibniz-Institut für Katalyse e.V.
Carolin Amber Martina Stein: Leibniz-Institut für Katalyse e.V.
Thomas Schareina: Leibniz-Institut für Katalyse e.V.
Yuya Hu: Leibniz-Institut für Katalyse e.V.
Alexander Léval: Leibniz-Institut für Katalyse e.V.
Jonas Massa: APEX Energy GmbH
Volkan Turan: APEX Energy GmbH
Peter Sponholz: APEX Energy GmbH
Duo Wei: Leibniz-Institut für Katalyse e.V.
Ralf Jackstell: Leibniz-Institut für Katalyse e.V.
Henrik Junge: Leibniz-Institut für Katalyse e.V.
Matthias Beller: Leibniz-Institut für Katalyse e.V.

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Liquid (organic) hydrogen carriers ([18H]-dibenzyltoluene, MeOH, formic acid, etc.) form a toolbox for the storage and transport of green hydrogen, which is crucial for the implementation of renewable energy technologies. Simple organic salts have been scarcely investigated for this purpose, despite many advantages such as low cost and minor toxicity, as well as easy handling. Here, we present a potassium formate/potassium bicarbonate hydrogen storage and release energy system, that is applicable and shows high stability (6 months). Utilizing ppm amounts of the molecularly defined Ru-5 complex, hydrogen release rates of up to 9.3 L h−1 were achieved. The same catalyst system promoted the hydrogenation of KHCO3 to HCOOK with a TON of 9650. In this way, combined hydrogen storage-release cycles can be performed for 40 times.

Date: 2024
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DOI: 10.1038/s41467-024-51658-2

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