| Autor: |
Liang, Yunchang, Banjac, Karla, Martin, Kévin, Zigon, Nicolas, Lee, Seunghwa, Vanthuyne, Nicolas, Garcés-Pineda, Felipe Andrés, Galán-Mascarós, José R., Hu, Xile, Avarvari, Narcis, Lingenfelder, Magalí |
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| Zdroj: |
Nature Communications; 6/10/2022, Vol. 13 Issue 1, p1-9, 9p |
| Abstrakt: |
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. While solar-to-fuel catalysis requires the careful transfer of electrons, there are still challenges understanding how electron spin contributes to reactivity. Here, authors employ chiral fused thiadiazole-helicenes to control spin polarization in oxygen evolution electrocatalysts. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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