Publication date: 26th March 2026
Electrocatalysis has emerged as a promising process to store renewable energy into fuels, such as green H2, and high added-value chemicals to decarbonise the energy and fine chemical sectors. In the H2 evolution, the oxygen evolution reaction (OER) is the process bottleneck due to its slow reaction kinetics, especially when using Earth-abundant metal oxide catalysts. The efficiency of these catalysts does not only depend on the nature of the metal oxide, but also on their physical characteristics such as composition, magnetic susceptibility, and chirality, as well as the transient behaviour and cooperativity between active sites. However, the influence of some of these catalysts characteristics in the OER mechanism and kinetics remains elusive. Obtaining such detailed mechanistic and kinetic knowledge requires the use of in-situ and operando spectroscopic techniques that can probe the system under operating conditions.
In this talk, I will discuss cooperativity between active sites in different NiFeOx anodes for OER and glycerol oxidation.1 Such cooperativity effects have recently been reported to lead to different surface coverage of active sites,2 leading to changes in the OER mechanism. I will also be discussing how external magnetic fields3 or the intrinsic chiral nature,4 taking advantage of the chiral induced spin selectivity effect, of a NiFeOx anode influence such cooperativity and lead to enhanced OER kinetics.
C.A.M. acknowledges the Ramón y Cajal program (RYC2023-045597-I) funded by MICIU/AEI/10.13039/501100011033 and FSE+.
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