Hard X‑ray Photoelectron Spectroscopy Probing Fe Segregation during the Oxygen Evolution Reaction

• Published in: ACS applied materials & interfaces Vol. 16; no. 43; pp. 59516 - 59527
• Main Authors: Longo, Filippo, Lloreda-Jurado, Pedro Javier, Gil-Rostra, Jorge, Gonzalez-Elipe, Agustin R., Yubero, Francisco, Thomä, Sabrina L. J., Neels, Antonia, Borgschulte, Andreas
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 30.10.2024
• Subjects: catalysts; electrochemistry; electrodes; electrolytes; oxygen production; porosity; species; Surfaces, Interfaces, and Applications; X-ray photoelectron spectroscopy; NiFe-oxyhydroxide; oxygen evolution reaction; HAXPES; Fe surface segregation; nondestructive in-depth chemical profiles; nanostructured thin film catalysts

NiFe electrocatalysts are among the most active phases for water splitting with regard to the alkaline oxygen evolution reaction (OER). The interplay between Ni and Fe, both at the surface and in the subsurface of the catalyst, is crucial to understanding such outstanding properties and remains a su...