What question did this study set out to answer?

This study aims to elucidate the mechanisms behind the oxygen evolution reaction (OER) in specific electrocatalysts.

Surface Reconstruction in Alkaline Electrolyte of Co–Ni–Fe Oxy(hydroxy)fluorides: Formation of Efficient OER Catalysts Involving Lattice Oxygen Mechanisms

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Randomized trial investigates OER catalysis in alkaline electrolyte using Co–Ni–Fe oxy(hydroxy)fluorides, highlighting performance implications.

This study aims to elucidate the mechanisms behind the oxygen evolution reaction (OER) in specific electrocatalysts.
Comprehensive mechanistic investigation of Co–Ni–Fe oxy(hydroxy)fluorides with varied compositions.
Use of in situ and ex situ electrochemical and analytical techniques to observe surface chemical reconstruction.
Isotope labeling study to demonstrate the lattice oxygen mechanism.
The composition Co 0.25 Ni 0.25 Fe 3+ 0.5 O 0.5 F 1.3 (OH) 0.2 shows the highest catalytic activity within the series.
Significant surface reconstruction occurs, transforming into a MOOH phase that enhances OER performance.
Cobalt and nickel act as main active sites, demonstrating synergy that leads to the lowest apparent activation energy.

Terry et al. (2026) studied this question.

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Randomized trial investigates OER catalysis in alkaline electrolyte using Co–Ni–Fe oxy(hydroxy)fluorides, highlighting performance implications.