Oxygen Vacancy Engineering Constructed V2O5-NiO Nanosheets Promote 5-Hydroxymethylfurfural Electrooxidation

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. Graphical A V 2 O 5 -NiO nanosheet electrocatalyst, synthesized through a hydrothermal process, demonstrates a remarkable 96.7% yield of FDCA in the electrocatalytic oxidation of HMF. This result underscores the significance of oxygen vacancies and the synergistic interaction between V 2 O 5 and NiO in improving the catalyst's performance, making it a promising candidate for sustainable biomass conversion.