The interfacial electron modulation of electrocatalyst is an effective strategy to realize the oxidation of organic chemicals. Here, a heterojunction (CoP-CoOOH) is prepared via a modulating electron density between interfaces for 5-hydroxymethylfurfural (HMF) oxidation to 2,5-furanedioic acid (FDCA) in high concentration. Density Functional Theory (DFT) shows that heterojunction increased efficient charged active centers, enhanced the adsorption of the reactant on the surface of electrocatalyst, and improved the HMF oxidation reaction (HMFOR) activity. The electrolyzer using CoP-CoOOH as cathodic evolution H₂ and anodic HMFOR requires only voltage of 1.42 V. Additionally, the diffusion limitation of the reaction is overcome via coupling with the flow reactor, which further improved the HMFOR efficiency. Although the HMF concentration is 150 mM, the Faraday efficiency of HMF and the selectivity of FDCA in the flow reactor are 98.2 % and 99.4 %, respectively.

电催化剂的界面电子调制是实现有机化学品氧化的有效策略。在这里，通过调节界面之间的电子密度来制备异质结 (CoP-CoOOH)，以将 5-羟​​甲基糠醛 (HMF) 氧化成高浓度的 2,5-呋喃二酸 (FDCA)。密度泛函理论（DFT）表明，异质结增加了有效的带电活性中心，增强了反应物在电催化剂表面的吸附，提高了HMF氧化反应（HMFOR）的活性。以CoP-CoOOH为阴极析出H _{2的电解槽}阳极 HMFOR 只需要 1.42 V 的电压。此外，通过与流动反应器的耦合克服了反应的扩散限制，进一步提高了 HMFOR 效率。尽管 HMF 浓度为 150 mM，但 HMF 的法拉第效率和 FDCA 在流动反应器中的选择性分别为 98.2 % 和 99.4 %。