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学者姓名：陈嘉彬
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Abstract ：
Transition metal-based electrocatalysts are a promising alternative to noble metal catalysts for electrochemical upgrading of biomass-derived 5-hydroxymethylfurfural (HMF) into high-value 2,5-furandicarboxylic acid (FDCA). However, the rational design of efficient electrocatalysts with precisely tailored structure–activity correlations remains a critical challenge. Herein, we report a hierarchically structured self-supporting electrode (Vo-NiCo(OH)2-NF) synthesized through in situ electrochemical reconstruction of NiCo-Prussian blue analogue (NiCo-PBA) precursor, in which oxygen vacancy (Vo)-rich Co-doped Ni(OH)2 nanosheet arrays are vertically aligned on nickel foam (NF), creating an interconnected conductive network. When evaluated for the HMF oxidation reaction (HMFOR), Vo-NiCo(OH)2-NF exhibits exceptional electrochemical performance, achieving near-complete HMF conversion (99%), ultrahigh FDCA Faradaic efficiency (97.5%), and remarkable product yield (96.2%) at 1.45 V, outperforming conventional Co-doped Ni(OH)2 (NiCo(OH)2-NF) and pristine Ni(OH)2 (Ni(OH)2-NF) electrodes. By combining in situ spectroscopic characterization and theoretical calculations, we elucidate that the synergistic effects of Co-doping and oxygen vacancy engineering effectively modulate the electronic structure of Ni active centers, favor the formation of high-valent Ni3+ species, and optimize HMF adsorption, thereby improving the HMFOR performance. This work provides valuable mechanistic insights for catalyst design and may inspire the development of advanced transition metal-based electrodes for efficient biomass conversion systems. © 2025 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.
Keyword ：
Coated wire electrodes Coated wire electrodes Electrolytic reduction Electrolytic reduction Nanosheets Nanosheets Reconstruction (structural) Reconstruction (structural) Structural analysis Structural analysis Structural dynamics Structural dynamics
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| GB/T 7714 | Xie, Diexin , Chen, Jiabin , Hou, Jingxin et al. Rational design of oxygen vacancy-rich self-supporting NiCo(OH)2 electrode for efficient biomass upgrading [J]. | Journal of Energy Chemistry , 2025 , 108 : 558-566 . |
| MLA | Xie, Diexin et al. "Rational design of oxygen vacancy-rich self-supporting NiCo(OH)2 electrode for efficient biomass upgrading" . | Journal of Energy Chemistry 108 (2025) : 558-566 . |
| APA | Xie, Diexin , Chen, Jiabin , Hou, Jingxin , Yang, Fangfang , Feng, Runping , Cao, Changsheng et al. Rational design of oxygen vacancy-rich self-supporting NiCo(OH)2 electrode for efficient biomass upgrading . | Journal of Energy Chemistry , 2025 , 108 , 558-566 . |
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