数字农科院2.0

Constructing Oxygen Vacancy-Enriched Ag-Mn(OH)2 via Anionic Leaching and Ag Modification: Inducing High-Valence Mn Active Sites for Efficient Electrocatalytic Oxidation of 5-Hydroxymethylfurfural

文献类型: 外文期刊

作者: Xianan Guo; Maolin Zhang; Wenyang Wang; Zhenyu Xie; Lixin Lin; Pengwei Li; Guanju Li; Zhuo Chen; Shuhui Bo

关键词: 2;5-furandicarboxylic acid; biomass upgrading; electrocatalysis; Manganese-based; materials oxygen vacancies

期刊名称: Advanced Energy Materials

ISSN: 1614-6832

年卷期: 2025 年

页码:

收录情况: SCIE(2025版) ; ; EI(2025版)

摘要: Electrochemical oxidation of 5-hydroxymethylfurfural (HMF) using non-precious transition metal catalysts presents a sustainable pathway for producing high-value 2,5-furandicarboxylic acid (FDCA). Manganese-based materials hold promise for HMF oxidation reactions but suffer from low intrinsic conductivity and sluggish kinetics in the formation of high-valence Mn active species. Herein, a multi-scale engineering strategy to construct a 3D Ag-Mn(OH)2-OV/nickel foam (NF) catalyst by synergistically integrating electrochemical activation-induced MoO42− leaching and Ag nanoparticle modification on a pre-synthesized MnMoO4/NF is proposed. Spectroscopic characterizations reveal that this dual-functional modification strategy collectively generates an Ag-Mn(OH)2-OV/NF heterostructure enriched with oxygen vacancies (OV), thereby facilitating the formation of high-valent Mn3+ active centers. Moreover, the synergistic interplay between OV and Ag nanoparticles not only enhances the adsorption of reactants and reaction intermediates but also optimizes interfacial charge transfer, consequently lowering the overall reaction energy barrier. These cooperative effects collectively drive the superior catalytic performance of the Ag-Mn(OH)2-OV/NF. As a result, the Ag-Mn(OH)2-OV/NF catalyst achieves 100% HMF conversion rate and 98.60% FDCA Faradaic efficiency (FE) at 1.40 V versus. RHE, with its FE significantly higher than those of catalysts Mn(OH)2-OV/NF (70.11%) and Ag/NF (62.02%), and the electrolysis time is approximately halved.

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