Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.206
Publication date: 11th July 2022
A sustainable future requires highly efficient energy conversion processes. I will discuss two unconventional strategies to reach significant boosts in the electrocatalytic activity of Earth-abundant materials using spin control:
-At the interfacial level, magnetic fields affect the mass transfer of charged reactants (to) and products (from) the electrolyte. This effect is universal on both magnetic and non-magnetic electrodes. I will demonstrate this phenomenon operando using Pt and transition metal oxides as catalysts for the oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER).
-At the local level, we use chiral molecules to induce spin selective pathways on the catalyst’s surface. As a case study, I will show the use of functionalized helicenes to boost the oxygen evolution reaction (OER) by ca. 131 % (at the potential of 1.65 V vs. RHE) at state-of-the-art 2D catalysts via a spin-polarization mechanism) [1].
By decoupling the effects involved in interfacial vs local spin control, we provide a versatile strategy that can be easily implemented to boost electrocatalytic reactions on different materials.
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