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<p>Mo-doped mesoporous tin phosphate (Mo–SnP) was synthesized via a hydrothermal method and evaluated for its catalytic activity and recyclability in the liquid-phase alkylation of toluene with benzyl chloride. XRD, FT-IR, TEM, and N<sub>2</sub> physisorption characterizations confirmed the uniform incorporation of Mo species into the tin phosphate framework without forming segregated phases. NH<sub>3</sub>-TPD and DRIFT analyses revealed that Mo doping modulated acidity by reducing strong acid site strength and introducing Lewis acid sites. The optimized 0.2Mo-SnP catalyst demonstrated high activity (119.2&#xa0;mmol&#xa0;g<sup>−1</sup>&#xa0;h<sup>−1</sup>) in the alkylation of toluene with benzyl chloride, notably maintaining undiminished activity over three cycles, in contrast to undoped SnP, which exhibited over 50% conversion decline within three cycles.&#xa0;TG-DSC and N<sub>2</sub> physisorption studies demonstrated that Mo doping mitigated strong adsorption of reaction products, preventing pore blockage during regeneration and preserving structural integrity.</p> Graphical abstract <p></p>

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Mo-doping induced acidity modulation in mesoporous tin phosphate with enhanced recyclability for catalyzing toluene alkylation with benzyl chloride

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Tingting Wang,
  • Mengwei Han,
  • Jiahui Xie,
  • Longxue Miao,
  • Wancheng Zhu,
  • Heng Zhang

摘要

Mo-doped mesoporous tin phosphate (Mo–SnP) was synthesized via a hydrothermal method and evaluated for its catalytic activity and recyclability in the liquid-phase alkylation of toluene with benzyl chloride. XRD, FT-IR, TEM, and N2 physisorption characterizations confirmed the uniform incorporation of Mo species into the tin phosphate framework without forming segregated phases. NH3-TPD and DRIFT analyses revealed that Mo doping modulated acidity by reducing strong acid site strength and introducing Lewis acid sites. The optimized 0.2Mo-SnP catalyst demonstrated high activity (119.2 mmol g−1 h−1) in the alkylation of toluene with benzyl chloride, notably maintaining undiminished activity over three cycles, in contrast to undoped SnP, which exhibited over 50% conversion decline within three cycles. TG-DSC and N2 physisorption studies demonstrated that Mo doping mitigated strong adsorption of reaction products, preventing pore blockage during regeneration and preserving structural integrity.

Graphical abstract