Designing an efficient catalyst for the selective oxidation of biomass-derived platform chemical to value-added chemicals has always been an emerging field in the scientific community as well as for the industrial applications. Here, in the present study, the efforts were directed towards the development of catalyst based on non-precious metals for the selective oxidation of platform chemical, 5-hydroxymethylfurfural (5-HMF) to value-added chemical, 5-Formyl Furan-2-Carboxylic Acid (FFCA). Mixed metal oxide-based catalysts-containing manganese (Mn) and iron (Fe) with different wt% (Mn_xFe_y; x: y = 9:1, 7:3, 5:5, 3:7, 1:9) were successfully synthesized via hydrothermal route. The catalytic results showed the best yield of 37.7 % FFCA with 83.0 % conversion of 5-HMF using Mn₃Fe₇ under optimised reaction conditions (0.5 mmol Na₂CO₃, 140 °C, 90 min and 30 bar O₂). The characterizations through various techniques such as X-ray Diffractometer (XRD), Scanning Electron Microscope (SEM) and Energy-Dispersive X-ray Spectroscopy (EDS) suggested that the synthesised mixed oxides catalysts are composed of MnO₂, MnCO₃ and Fe₂O₃ phases with uniform distribution throughout the catalyst. Thus, the synergic effect of these mixed phases might play a role in selective oxidation of 5-HMF to FFCA. The influence of other reaction parameters such as time, temperature, pressure, the basicity and catalyst loading was also optimized for enhancing the yield of the oxidised product. The recyclability study revealed that Mn₃Fe₇ was stable for at least four runs in terms of FFCA yield.

设计用于将生物质衍生的平台化学品选择性氧化成增值化学品的有效催化剂一直是科学界以及工业应用中的新兴领域。在本文中，本研究致力于开发基于非贵金属的催化剂，用于将平台化学物质5-羟甲基糠醛（5-HMF）选择性氧化为增值化学物质5-甲酰基呋喃-2 -羧酸（FFCA）。包含不同重量百分比的锰（Mn）和铁（Fe）的混合金属氧化物基催化剂（Mn _x Fe _y ; x：y = 9：1、7：3、5：5、3：7、1：9通过水热途径成功合成。催化结果表明，最佳收率是37.7％FFCA，Mn转化5-HMF的转化率为83.0％₃的Fe ₇优化的反应条件下（0.5毫摩尔的Na ₂ CO ₃，140℃，90分钟和30巴Ò ₂）。通过X射线衍射仪（XRD），扫描电子显微镜（SEM）和能量色散X射线光谱仪（EDS）等多种技术表征表明，合成的混合氧化物催化剂由MnO ₂，MnCO ₃和Fe _2组成。 Ø ₃相均匀分布在整个催化剂中。因此，这些混合相的协同作用可能在5-HMF选择性氧化为FFCA中起作用。还优化了其他反应参数（如时间，温度，压力，碱度和催化剂负载量）的影响，以提高氧化产物的收率。可回收性研究表明，就FFCA产量而言，Mn ₃ Fe ₇至少可稳定运行四次。