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<p>Hydrodeoxygenation (HDO) of phenolics is crucial for lignin-to-fuel production via fast pyrolysis. The reaction under atmospheric H<sub>2</sub> pressure offers compatibility with pyrolysis conditions, high aromatic selectivity and low H<sub>2</sub> consumption, but suffers from coking-induced catalyst deactivation. In this work, we report a TiO<sub>x</sub>-decorated NiSn/SiO<sub>2</sub> catalyst (Ti-NiSn/SiO<sub>2</sub>), achieving 100% deoxygenation selectivity and enhanced stability in <i>m</i>-cresol HDO. The superior performance stems from: (i) the interfacial synergy between TiO<sub>x</sub> and NiSn alloy that facilitates C-O bond cleavage with a reduced energy barrier; (ii) the geometric isolation and electron-donating properties of Sn, which suppress undesirable side reactions and mitigate coke formation; and (iii) the inverse TiO<sub>x</sub> decoration strategy, which enables effective interface chemistry while minimizing acidic sites that could otherwise accelerate coking. This study presents a design strategy for constructing inverse oxide–alloy interface catalysts, offering multi-faceted advantages for HDO and other complex catalytic transformations.</p>

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Inverse decoration of TiOx to NiSn alloy nanoparticles for efficient hydrodeoxygenation of m-cresol

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月19日

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  • Feifei Yang,
  • Chengyu Li,
  • Maolin Wang,
  • Shixiang Yu,
  • Jiankang Zhao,
  • Yao Xu,
  • Wei Zhou,
  • Xiaodong Yi,
  • Ding Ma

摘要

Hydrodeoxygenation (HDO) of phenolics is crucial for lignin-to-fuel production via fast pyrolysis. The reaction under atmospheric H2 pressure offers compatibility with pyrolysis conditions, high aromatic selectivity and low H2 consumption, but suffers from coking-induced catalyst deactivation. In this work, we report a TiOx-decorated NiSn/SiO2 catalyst (Ti-NiSn/SiO2), achieving 100% deoxygenation selectivity and enhanced stability in m-cresol HDO. The superior performance stems from: (i) the interfacial synergy between TiOx and NiSn alloy that facilitates C-O bond cleavage with a reduced energy barrier; (ii) the geometric isolation and electron-donating properties of Sn, which suppress undesirable side reactions and mitigate coke formation; and (iii) the inverse TiOx decoration strategy, which enables effective interface chemistry while minimizing acidic sites that could otherwise accelerate coking. This study presents a design strategy for constructing inverse oxide–alloy interface catalysts, offering multi-faceted advantages for HDO and other complex catalytic transformations.