Evaluation of the state of Ru in IrRu and IrRuTi alloys for oxygen evolution reaction in water electrolysers using tender XAS/XES

Ir-based catalysts are state-of-the-art materials for oxygen evolution reaction in proton exchange membrane water electrolyzers. The addition of Ru leads to higher activity of these electrocatalysts. Here, we propose to compare IrRu and IrRuTi alloys before and after the anodic polarization in order to evaluate the changes in the state of Ru after the oxygen evolution reaction as well as to define the role of Ti additives onto Ru oxidation state. The obtained results will be correlated with electrochemical activity-stability data.