Dataset of "In situ activation mechanisms governing the stabilization through the optimal core-shell formation in bimetallic Ir-Ru catalysts"

Investigates the correlation between the chemical and structural evolution during activation of magnetron-sputtered thin-film Ir-Ru bimetallic catalysts during OER to broaden the understanding of Ir-Ru@IrOx core-shell formation. A wide range of Ir-Ru compositions were studied using Rotating Disk Electrode (RDE) measurements, X-ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), synchrotron-based operando XRD and Scanning Flow Cell Inductively Coupled Plasma Mass Spectrometry (SFC-ICP-MS). The combination of these techniques allowed us to explain why Ir-Ru in atomic ratio 25/75 is the optimal catalyst in terms of both activity and stability and to unravel how the rapid dissolution of its surface leads to the formation of an ideal core-shell structure