^*OH Adsorption-Mediated Electrochemical Oxidation of 5-Hydroxymethylfurfural to Selective 2,5-Furandicarboxylic Acid at pH 12.

ABSTRACT: Strongly alkaline electrolytes are typically used for electrochemical 5-hydroxymethylfurfural oxidation (HMFOR) to selective 2,5-furandicarboxylic acid (FDCA) production, despite HMF degradation. Although HMF remains stable in weakly alkaline media, slow kinetics due to limited OH^- concentration hinder active FDCA formation. Herein, unlike the CuO or NiOOH catalyst, significantly improved direct aldehyde oxidation is demonstrated via the utilization of adsorbed OH (^*OH) on the CuO/NiOOH interface surface, enabling complete conversion to FDCA even at mild pH. Operando measurements reveal that the CuO/NiOOH interface serves as a synergistic active site: Cu sites enhance ^*OH adsorption and utilization, while Ni sites promote HMF dehydrogenation through rapid N

SUBMITTER: Lee E 

PROVIDER: S-EPMC12915199 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature