Composite Bifunctional Electrocatalyst for the Oxygen Reduction and Evolution Reactions.

ABSTRACT: Bifunctional oxygen electrocatalysts are subjected to stringent performance and stability criteria. The catalyst must achieve high oxygen evolution reaction (OER) activity while in electrolyzer operation, as well as high oxygen reduction reaction (ORR) activity while in fuel cell operation. Additionally, the catalyst must be stable over a wide potential range and withstand alternating reducing and oxidizing potentials. In this work, a composite Ni_0.95Fe_0.05O_1±δ/NiCo₂O₄ is rigorously tested as a bifunctional catalyst for anion exchange membrane (AEM) fuel cell and electrolyzer operation. An alternating potential stability test is performed, which unveils the areas where the bifunctional catalyst needs improvement. The OER activity of th

SUBMITTER: Beall CE 

PROVIDER: S-EPMC12426780 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature