Electro-oxidation of 5-hydroxymethylfurfural in a low-concentrated alkaline electrolyte by enhancing hydroxyl adsorption over a single-atom supported catalyst  

负载型单原子催化剂促进氢氧根吸附用于低浓度碱性电解液中的5-羟甲基糠醛电氧化

作　　者：Xiaoxia Xia Jingyi Xu Xinru Yu Jing Yang An-Zhen Li Kaiyue Ji Lei Li Min Ma Qian Shao Ruixiang Ge Haohong Duan 夏晓霞;徐静怡;于欣茹;杨静;李岸臻;纪凯悦;李磊;马敏;邵谦;葛瑞翔;段昊泓

机构地区：[1]College of Chemical and Biological Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]Department of Chemistry,Tsinghua University,Beijing 100084,China [3]Hefei National Research Center for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China [4]College of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China

出　　处：《Science Bulletin》2024年第18期2870-2880,共11页科学通报（英文版）

基　　金：supported by the National Key R&D Program of China(2023YFA1507400);Natural Science Foundation of Shandong Province(ZR2023QB094);Young Science and Technology,the National Natural Science Foundation of China(22325805 and 21935001);Beijing Natural Science Foundation(JQ22003)。

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^(-1)KOH)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^(-1)KOH),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-Co3O4catalyst,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.

关 键 词：Biomass upgrading Electro-oxidation Single-atom catalyst Low-alkaline medium 

分 类 号：TK6[动力工程及工程热物理—生物能] TQ251.1[化学工程—有机化工] O643.36[理学—物理化学]