Electrocatalytic oxidation of 5-hydroxymethylfurfural by MnO2 with tunable surface oxidation states†

IF 4.2 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Science & Technology Pub Date : 2025-05-27 DOI:10.1039/D5CY00341E

Yongle Zhang, Yingyi Tu, Yunying Huo, Guang Pan, Qiao Zhang, Zhiting Liu, Guangxing Yang and Feng Peng

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Abstract

The electrochemical catalytic oxidation of 5-hydroxymethylfurfural (HMF) to generate high-value products like 2,5-furandicarboxylic acid (FDCA) has become a prominent research interest. In this work, an economical and efficient transition metal ε-MnO₂ catalyst was used to electrocatalyze the oxidation of HMF in acidic environments. The results revealed a highly efficient HMF conversion rate of 92.95% and a FDCA yield of 23.03% under the specific conditions of 60 °C, 0.5 M H₂SO₄ and 1.6 V (vs. RHE). Furthermore, the study outlined the oxidation pathway for HMF, which progresses through the following sequence: HMF → DFF → FFCA → FDCA. The apparent activation energies associated with each oxidation stage were found to be 25.52, 22.12 and 16.21 kJ mol⁻¹, respectively. Moreover, the findings indicated a favorable relationship between the electrocatalytic oxidation activity of HMF and the average surface oxidation state of ε-MnO₂.

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表面氧化态可调的MnO2电催化氧化5-羟甲基糠醛

电化学催化氧化5-羟甲基糠醛（HMF）生成2,5-呋喃二羧酸（FDCA）等高价值产品已成为研究热点。本文采用经济高效的过渡金属ε-MnO2催化剂，在酸性环境下电催化HMF氧化。结果表明，在60°C、0.5 M H2SO4、1.6 V （vs. RHE）条件下，HMF转化率为92.95%，FDCA收率为23.03%。此外，研究概述了HMF的氧化途径，其过程顺序为：HMF→DFF→FFCA→FDCA。各氧化阶段的表观活化能分别为25.52、22.12和16.21 kJ mol−1。此外，研究结果表明，HMF的电催化氧化活性与ε-MnO2的平均表面氧化态之间存在良好的关系。

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来源期刊

Catalysis Science & Technology CHEMISTRY, PHYSICAL-

CiteScore

8.70

自引率

6.00%

发文量

587

审稿时长

1.5 months

期刊介绍： A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days