Operando X-ray spectroscopic tracking of self-reconstruction for anchored nanoparticles as high-performance electrocatalysts towards oxygen evolution

Operando X-ray absorption spectroscopy (XAS) technique unravels that the CoFe nanoparticles in a new type of lanthana-anchored CoFe catalyst are nearly transformed into unique (Co/Fe)O(OH) under the electrochemical condition, as real active species for oxygen evolution reaction.