Fluorine-Induced Synergistic Surface Reconstruction and LOM Activation in FeVO4 for Enhanced Water Oxidation
Xiaogang Liu1, Mengyu Chen1, Shuangying Li1
1College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, China.
None:
The development of highly efficient oxygen evolution reaction (OER) catalysts, considering both structural reconstruction and reaction mechanism, is of paramount importance for electrochemical water splitting. Herein, we demonstrate a substantial improvement in the OER performance of iron vanadate (FeVO4) nanorods achieved through the fluorine-anion occupancy of oxygen vacancies. The structural modification markedly enhances metal-oxygen covalency, thereby facilitating rapid charge transfer at the catalyst-electrolyte interface and optimizing the dissolution kinetics of vanadium species. Importantly, the accumulation of charge density at lattice oxygen sites activates the lattice oxygen-mediated (LOM) pathway, thereby promoting the efficient incorporation of OH- ions and triggering in situ surface reconstruction into catalytically active FeOOH phases during operation. The synergistic effects of LOM activation and favorable surface reconstruction collectively result in enhanced electrochemical activity and improved operational stability. This study successfully illustrates a novel and intriguing concept for regulating local lattice oxygen activity for the development of high-performance OER electrocatalysts.
Related Concept Videos
Cycloaddition Reactions: MO Requirements for Photochemical Activation
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Halogens
Interfacial Electrochemical Methods: Overview
Valence Bond Theory
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide


