Oxygen Vacancy Engineering Constructed V ₂ O ₅ ‐NiO Nanosheets Promote 5‐Hydroxymethylfurfural Electrooxidation

Abstract This study presents the synthesis of a V 2 O 5 ‐NiO nanosheets composite catalyst via a straightforward hydrothermal method, aiming to explore the relationship between its microstructural features and its performance in the 5‐hydroxymethylfurfural oxidation reaction (HMFOR). The analysis revealed a notable increase in the concentration of oxygen vacancies in the V 2 O 5 ‐NiO composite compared to pure V 2 O 5 , indicating an enhanced catalytic capacity. The V 2 O 5 ‐NiO electrocatalyst achieved an impressive 2,5‐Furandicarboxylic acid (FDCA) conversion rate of 96.7%, demonstrating excellent electrochemical activity. Moreover, the catalyst exhibited remarkable stability, maintaining high conversion efficiencies for both 5‐Hydroxymethylfurfural (HMF) to FDCA over multiple cycles. These results emphasize the critical role of oxygen vacancies and the synergistic interaction between V 2 O 5 and NiO in optimizing catalyst performance. This work provides important insights into the design of robust, efficient electrocatalysts, advancing the sustainable production of FDCA from HMF.