数字农科院2.0

Carbon-regulated MnxOy catalysts from Mn-MOF-74: Synergistic effects on glucose oxidation to formic acid

文献类型： 外文期刊

作者： Hongrui Guo;Chengjie Sun;Mo Qiu;Hejuan Wu;Zhihui Ma;Jirui Yang;Feng Shen

作者机构：

关键词： Biomass upgrading;Composite materials;Metal-organic frameworks;Organic acid;Sustainability

期刊名称： Biomass and Bioenergy

ISSN： 1873-2909

年卷期： 2025 年 204 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： The catalytic oxidation of glucose to formic acid (FA) represents a crucial route for biomass valorization. Metal–organic framework (MOF)-derived carbon composites offer exceptional tunability for catalyst design. Herein, a series of carbon-regulated MnxOy/C catalysts from Mn-MOF-74 precursors via controlled calcination atmospheres and temperatures, achieving satisfactory performance in glucose-to-FA conversion. Comprehensive characterization reveals that the carbon matrix plays a synergistic effect: dispersing MnxOy nanoparticles to enhance substrate accessibility, and preventing Mn leaching to improve stability. The FA yield is determined by fine-tuning key parameters: the (Mn2++Mn3+)/Mn valence ratio and MnxOy particle size. Combined DFT and experimental analyses demonstrate that Mn valence states determine reaction kinetics: Mn3O4 exhibits elevated glucose adsorption energy and reduced formic acid (FA) desorption energy, while MnO displays an opposing trend, rationalizing the activity differences. This work establishes a carbon-mediated synergy strategy for designing efficient Mn-based catalysts in biomass oxidation upgrading.

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