Enhancement of electrocatalysis through magnetic field effects on mass transport

This study investigates the impact of magnetic fields on electrocatalysis, focusing on the distinction between kinetic and mass transport effects. Using a specialized magneto-electrochemical system and non-magnetic electrodes, the researchers quantified magnetic field effects on various reactions. Results show a minor enhancement in reactions with high reactant availability (like the oxygen evolution reaction, OER), while diffusion-limited reactions (like the oxygen reduction reaction, ORR) experience substantial boosts exceeding 50%. Direct visualization confirms the pivotal role of Lorentz forces on electrolyte ions, with bubble movement being a secondary phenomenon. These findings offer crucial insights into magnetic field influences on electrocatalysis and suggest pathways for improving sustainable energy technologies.

Priscila Vensaus, Yunchang Liang, Jean-Philippe Ansermet, Galo J. A. A. Soler-Illia, Magali Lingenfelder