Uphill production of dihydrogen by enzymatic oxidation of glucose without an external energy source

Emmanuel Suraniti, Pascal Merzeau, Jérôme Roche, Sébastien Gounel, Andrew G. Mark, Peer Fischer, Nicolas Mano and Alexander Kuhn ()
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Emmanuel Suraniti: Max Planck Institute for Intelligent Systems
Pascal Merzeau: Univ. Bordeaux
Jérôme Roche: Université de Toulouse, UPS-INP-CNRS
Sébastien Gounel: Univ. Bordeaux
Andrew G. Mark: Max Planck Institute for Intelligent Systems
Peer Fischer: Max Planck Institute for Intelligent Systems
Nicolas Mano: Univ. Bordeaux
Alexander Kuhn: ENSCBP

Nature Communications, 2018, vol. 9, issue 1, 1-9

Abstract: Abstract Chemical systems do not allow the coupling of energy from several simple reactions to drive a subsequent reaction, which takes place in the same medium and leads to a product with a higher energy than the one released during the first reaction. Gibbs energy considerations thus are not favorable to drive e.g., water splitting by the direct oxidation of glucose as a model reaction. Here, we show that it is nevertheless possible to carry out such an energetically uphill reaction, if the electrons released in the oxidation reaction are temporarily stored in an electromagnetic system, which is then used to raise the electrons’ potential energy so that they can power the electrolysis of water in a second step. We thereby demonstrate the general concept that lower energy delivering chemical reactions can be used to enable the formation of higher energy consuming reaction products in a closed system.

Date: 2018
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DOI: 10.1038/s41467-018-05704-5

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