Single-phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm2geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.
- oxygen evolution reaction
- water splitting
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Energy Engineering and Power Technology
- Materials Chemistry
- Electrical and Electronic Engineering