Insight into the oxygen evolution reaction mechanism catalyzed by phosphate-substituted FeCo2O4 nanosheets: proton-coupled electron transfer assisted adsorbate evolution mechanism investigated by in situ NAP-XPS

This study explores phosphate-substituted FeCo 2 O 4 as catalysts for the oxygen evolution reaction. In situ NAP-XPS analysis elucidates the reaction pathway, with proton-coupled electron transfer identified as a critical mechanistic step.