Spin-controlled electrochemistry using chiral electrodes: effects on water electrolysis

Francesco Tassinari, Wilbert Mtangi, Koyel Banerjee-Ghosh, Beatrice Adelizzi, Francesca Parenti, Kiran Vankayala, Anja Palmans, Andreas Vargas Jentzsch, Claudio Fontanesi, Adele Mucci, E.W. Meijer, Ron Naaman

Research output: Contribution to journalMeeting AbstractAcademic

Abstract

Hydrogen is the ecologically ideal energy vector. Efficient photo-electrochemical production of hydrogen from water could be the optimal solution to the energy storage problems related to renewable sources. However, in the water splitting reaction the electric potential required to initiate the process significantly exceeds the thermodynamic limit. By controlling the spins of the electrons that are transferred from the solution to the anode, and ensuring that they are coaligned, the threshold voltage for the process can in theory be decreased to that of the thermodynamic voltage. In the present study, by using TiO2 anodes coated with chiral materials, we explore what are the effects of having a spin-polarized current on water electrolysis. The spin-polarization arises from exploiting what is known as Chiral Induced Spin Selectivity effect by using chiral molecules as spin filters.
When using chiral molecules instead of a non-chiral analogue, the hydrogen production from water is enhanced, the threshold voltage is reduced and the by-product formation of hydrogen peroxide is suppressed.
Original languageEnglish
Article number492
JournalAbstracts of Papers of the American Chemical Society
Volume255
Publication statusPublished - 18 Mar 2018
Event

255th ACS National Meeting

- New Orleans Convention Center, New Orleans, United States
Duration: 18 Mar 201822 Mar 2018

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