H₂O₂ Production at Low Overpotentials for Electroenzymatic Halogenation Reactions

H₂O₂ Production at Low Overpotentials for Electroenzymatic Halogenation Reactions

Bormann, Sebastian (DECHEMA Forschungsinstitut)
van Schie, M.M.C.H. (TU Delft BT/Biocatalysis)
Pedroso de Almeida, T. (TU Delft BT/Biocatalysis)
Zhang, W. (TU Delft BT/Biocatalysis)
Stöckl, Markus (DECHEMA Forschungsinstitut)
Ulber, Roland (Technische Universität Kaiserslautern)
Hollmann, F. (TU Delft BT/Biocatalysis)
Holtmann, Dirk (DECHEMA Forschungsinstitut)

2019

Various enzymes utilize hydrogen peroxide as an oxidant. Such “peroxizymes” are potentially very attractive catalysts for a broad range of oxidation reactions. Most peroxizymes, however, are inactivated by an excess of H₂O₂. The electrochemical reduction of oxygen can be used as an in situ generation method for hydrogen peroxide to drive the peroxizymes at high operational stabilities. Using conventional electrode materials, however, also necessitates significant overpotentials, thereby reducing the energy efficiency of these systems. This study concerns a method to coat a gas-diffusion electrode with oxidized carbon nanotubes (oCNTs), thereby greatly reducing the overpotential needed to perform an electroenzymatic halogenation reaction. In comparison to the unmodified electrode, with the oCNTs-modified electrode the overpotential can be reduced by approximately 100 mV at comparable product formation rates.

biocatalysis
carbon nanotubes
electrochemistry
enzymes
hydrogen peroxide

http://resolver.tudelft.nl/uuid:ae965a7f-9ba0-4655-850f-640f4fe6e2dc

https://doi.org/10.1002/cssc.201902326

1864-5631

ChemSusChem (Print): chemistry & sustainability, energy & materials, 12 (21), 4759-4763

Institutional Repository

journal article

© 2019 Sebastian Bormann, M.M.C.H. van Schie, T. Pedroso de Almeida, W. Zhang, Markus Stöckl, Roland Ulber, F. Hollmann, Dirk Holtmann