Mingoes, CJ;
Schroeder, BC;
Jorge Sobrido, AB;
(2023)
Electron Spin Selective Iridium Electrocatalysts for the Oxygen Evolution Reaction.
ACS Materials Au
10.1021/acsmaterialsau.3c00084.
(In press).
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Abstract
Highly efficient electrocatalysts for water electrolysis are crucial to the widespread commercialization of the technology and an important step forward toward a sustainable energy future. In this study, an alternative method for boosting the electrocatalytic activity toward the oxygen evolution reaction (OER) of a well-known electrocatalyst (iridium) is presented. Iridium nanoparticles (2.1 ± 0.2 nm in diameter) functionalized with chiral molecules were found to markedly enhance the activity of the OER when compared to unfunctionalized and achiral functionalized iridium nanoparticles. At a potential of 1.55 V vs Reference Hydrogen Electrode (RHE), chiral functionalized iridium nanoparticles exhibited an average 85% enhancement in activity with respect to unfunctionalized iridium nanoparticles compared to an average 13% enhancement for the achiral functionalized iridium nanoparticle. This activity enhancement is attributed to a spin-selective electron transfer mechanism taking place on the chiral functionalized catalysts, a characteristic induced by the chirality of the ligand. This alternative path for the OER drastically reduces the production of hydrogen peroxide, which was confirmed via a colorimetric method.
| Type: | Article |
|---|---|
| Title: | Electron Spin Selective Iridium Electrocatalysts for the Oxygen Evolution Reaction |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acsmaterialsau.3c00084 |
| Publisher version: | http://dx.doi.org/10.1021/acsmaterialsau.3c00084 |
| Language: | English |
| Additional information: | © 2023 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0. |
| Keywords: | chirality, chiral-induced spin selectivity (CISS), electrocatalysts, oxygen evolution reaction, iridium nanoparticles, electron spin |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10184625 |
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