Unveiling Surface Species Formed on Ni-Fe Spinel Oxides During the Oxygen Evolution Reaction at the Atomic Scale.

ABSTRACT: Optimizing electrocatalyst performance requires an atomic-scale understanding of surface state changes and how those changes affect activity and stability during the reaction. This is particularly important for the oxygen evolution reaction (OER) since the electrocatalytically active surfaces undergo substantial reconstruction and transformation. Herein, a multimodal method is employed that combines X-ray photoemission spectroscopy, transmission electron microscopy, atom probe tomography, operando surface-enhanced Raman spectroscopy with electrochemical measurements to examine the surface species formed on NiFe₂O₄, P-doped NiFe₂O₄ and Ni_1.5Fe_1.5O₄ upon OER cycling. The activated NiFe₂O₄ and P

SUBMITTER: Xiang W 

PROVIDER: S-EPMC12224984 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature