Understanding the oxygen reduction/evolution reactions (ORR/OER) on bimetallic Pt-Ir electrocatalysts using in-situ Raman spectroscopy and DFT

Key Points

• This research aims to explore the catalytic behavior and electronic properties of bimetallic Pt-Ir electrocatalysts during oxygen reactions.
• Utilized in-situ Raman spectroscopy to examine the electrocatalyst behavior under potential changes.
• Performed density functional theory (DFT) calculations to analyze electronic structure and reactivity.
• Focused on the formation of active Pt-Ir species and their effects on reaction pathways.
• Identified key changes in the electronic structure of Pt-Ir species during the reactions.
• Demonstrated enhanced catalytic activity attributed to the unique properties of bimetallic compositions.
• Showed that potential-dependent transformations play a critical role in electrocatalysis.