Unitized regenerative fuel cell (IMAGE) Washington University in St. Louis Caption Unitized regenerative fuel cell with highly active and highly stable bifunctional oxygen electrocatalyst with low bifunctionality: Pt-Pb2Ru2O7-x. Credit Vijay Ramani/Washington University in St. Louis Usage Restrictions Use allowed with proper attribution License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.