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Fe species anchored on N-doped carbon for depolymerization of lignin model compound oxidized by peroxymonosulfate

Author

Listed:
  • Ma, Qiao
  • Zhang, Jingze
  • Teng, Zhilin
  • Chen, Xiaoyu
  • Song, Feng
  • Jia, Yun
  • Xie, Yujiao
  • Zhang, Yuan
  • Tan, Hongzi
  • Yin, Xiaoyan
  • Cui, Hongyou

Abstract

The performance of the catalyst is crucial in the catalytic oxidative depolymerization of lignin. This study developed a novel synthetic strategy of the monolayer iron-anchored N-doped carbon catalyst for efficient catalytic oxidative depolymerization of lignin model compounds using potassium peroxymonosulfate (PMS) at ambient temperature. Iron species anchored on the N-doped carbon significantly enhanced depolymerization efficiency. Catalyst performance was optimized by tuning calcination temperature and iron doping level. HRTEM, XRD, XPS, HAADF-STEM, XANES, and EXAFS characterizations definitively identified the O-Fe-(NCN) unit as the active site. Synergy between the catalyst and solvent enhanced depolymerization and modulated product distribution. Substrate depolymerization proceeded via two pathways: a dominant non-radical reaction on the catalyst surface and a secondary radical pathway in aqueous solution.

Suggested Citation

  • Ma, Qiao & Zhang, Jingze & Teng, Zhilin & Chen, Xiaoyu & Song, Feng & Jia, Yun & Xie, Yujiao & Zhang, Yuan & Tan, Hongzi & Yin, Xiaoyan & Cui, Hongyou, 2026. "Fe species anchored on N-doped carbon for depolymerization of lignin model compound oxidized by peroxymonosulfate," Renewable Energy, Elsevier, vol. 256(PC).
    • Handle: RePEc:eee:renene:v:256:y:2026:i:pc:s0960148125018415
    DOI: 10.1016/j.renene.2025.124177
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