Enhancement of electrocatalytic oxygen evolution by chiral molecular functionalization of hybrid 2D electrodes

Yunchang Liang (), Karla Banjac, Kévin Martin, Nicolas Zigon, Seunghwa Lee, Nicolas Vanthuyne, Felipe Andrés Garcés-Pineda, José R. Galán-Mascarós, Xile Hu, Narcis Avarvari () and Magalí Lingenfelder ()
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Yunchang Liang: École Polytechnique Fédérale de Lausanne (EPFL)
Karla Banjac: École Polytechnique Fédérale de Lausanne (EPFL)
Kévin Martin: Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX
Nicolas Zigon: Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX
Seunghwa Lee: École Polytechnique Fédérale de Lausanne (EPFL)
Nicolas Vanthuyne: Aix Marseille Université, CNRS, Centrale Marseille, iSm2
Felipe Andrés Garcés-Pineda: The Barcelona Institute of Science and Technology (BIST)
José R. Galán-Mascarós: The Barcelona Institute of Science and Technology (BIST)
Xile Hu: École Polytechnique Fédérale de Lausanne (EPFL)
Narcis Avarvari: Univ Angers, CNRS, MOLTECH-Anjou, SFR MATRIX
Magalí Lingenfelder: École Polytechnique Fédérale de Lausanne (EPFL)

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract A sustainable future requires highly efficient energy conversion and storage processes, where electrocatalysis plays a crucial role. The activity of an electrocatalyst is governed by the binding energy towards the reaction intermediates, while the scaling relationships prevent the improvement of a catalytic system over its volcano-plot limits. To overcome these limitations, unconventional methods that are not fully determined by the surface binding energy can be helpful. Here, we use organic chiral molecules, i.e., hetero-helicenes such as thiadiazole-[7]helicene and bis(thiadiazole)-[8]helicene, to boost the oxygen evolution reaction (OER) by up to ca. 130 % (at the potential of 1.65 V vs. RHE) at state-of-the-art 2D Ni- and NiFe-based catalysts via a spin-polarization mechanism. Our results show that chiral molecule-functionalization is able to increase the OER activity of catalysts beyond the volcano limits. A guideline for optimizing the catalytic activity via chiral molecular functionalization of hybrid 2D electrodes is given.

Date: 2022
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DOI: 10.1038/s41467-022-31096-8

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