【摘要】 Electrocatalytic oxidation of 5-hydroxymethylfurfural （HMF） to 2,5-furandicarboxylic acid （FDCA）,a sustainable strategy to produce bio-based plastic monomer,is always conducted in a high-concentration alkaline solution (1.0 mol L^-1KOH) for high activity.However,such high concentration of alkali poses challenges including HMF degradation and high operation costs associated with product separation.Herein,we report a single-atom-ruthenium supported on Co₃O₄（Ru₁-Co₃O₄） as a catalyst that works efficiently in a low-concentration alkaline electrolyte (0.1 mol L^-1KOH),exhibiting a low potential of 1.191 V versus a reversible hydrogen electrode to achieve 10 m A cm^-2 in 0.1 mol L^-1 KOH,which outperforms previous catalysts.Electrochemical studies demonstrate that single-atom-Ru significantly enhances hydroxyl （OH^-） adsorption with insufficient OH^- supply,thus improving HMF oxidation.To showcase the potential of Ru₁-Co₃O₄ catalyst,we demonstrate its high efficiency in a flow reactor under industrially relevant conditions.Eventually,techno-economic analysis shows that substitution of the conventional1.0 mol L^-1 KOH with 0.1 mol L^-1 KOH electrolyte may significantly reduce the minimum selling price of FDCA by 21.0%.This work demonstrates an efficient catalyst design for electrooxidation of biomass working without using strong alkaline electrolyte that may contribute to more economic biomass electro-valorization.更多还原

【Abstract】 Electrocatalytic oxidation of 5-hydroxymethylfurfural （HMF） to 2,5-furandicarboxylic acid （FDCA）,a sustainable strategy to produce bio-based plastic monomer,is always conducted in a high-concentration alkaline solution (1.0 mol L^-1KOH) for high activity.However,such high concentration of alkali poses challenges including HMF degradation and high operation costs associated with product separation.Herein,we report a single-atom-ruthenium supported on Co₃O₄（Ru₁-Co₃O₄） as a catalyst that works efficiently in a low-concentration alkaline electrolyte (0.1 mol L^-1KOH),exhibiting a low potential of 1.191 V versus a reversible hydrogen electrode to achieve 10 m A cm^-2 in 0.1 mol L^-1 KOH,which outperforms previous catalysts.Electrochemical studies demonstrate that single-atom-Ru significantly enhances hydroxyl （OH^-） adsorption with insufficient OH^- supply,thus improving HMF oxidation.To showcase the potential of Ru₁-Co₃O₄ catalyst,we demonstrate its high efficiency in a flow reactor under industrially relevant conditions.Eventually,techno-economic analysis shows that substitution of the conventional1.0 mol L^-1 KOH with 0.1 mol L^-1 KOH electrolyte may significantly reduce the minimum selling price of FDCA by 21.0%.This work demonstrates an efficient catalyst design for electrooxidation of biomass working without using strong alkaline electrolyte that may contribute to more economic biomass electro-valorization.更多还原