Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Abstract Transition metal phosphides (TMPs) nanostructures are considered to be promising pre‐catalysts for electrochemical oxygen evolution reaction (OER). Nonetheless, most TMPs only experience limited surface reconstruction during OER, resulting in fewer active layer, insufficient sites and thus unsatisfactory performance. Thereby, finely control the level is crucial but still challenging. Here, Co 0.7−x Fe 0.3−y P/Co x y OOH nanohybird frameworks with numerous crystalline/amorphous interfaces fabricated by alkali etching of hollow crystalline 0.7 0.3 P nanocubes, leading in‐situ growth amorphous nanosheets subunits. Such nanohybrid own abundant phosphorus vacancies, optimal interface electronic structure, hydrophilic character, which manifest exceptional OER performance overpotential 256 mV reach 10 mA cm −2 current alkaline media, exceeding 1−x OOH, 1−y P/Fe P, IrO 2 , reported unprecious‐metal‐based catalysts. As revealed series ex‐situ spectroscopic analyses, formation anion defects phase promote deep such catalyst, triggering lattice participation synergy adsorbate mechanism toward OER. This work may spur development TMPs‐based catalysts integrating defect, engineering via facile etching, their applications water splitting or other clean energy options.

Language: Английский