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<p>Pt/SDB is one of the promising catalysts used in liquid-phase catalytic exchange (LPCE) reaction to treat the tritium-containing wastewater produced by nuclear power generation. Mesoporous polystyrene-divinylbenzene (SDB) was prepared by suspension polymerization. With ethylene glycol and formaldehyde as reducing agents, a mild reduction method was developed to prepare the SDB-supported platinum (Pt) active particles, which was given as Pt/SDB-EG-PA. The structural morphology and catalytic activity were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption desorption, and hydrogen-water catalytic exchange experiments. The results show that the Pt/SDB-EG-PA hydrophobic catalyst has outstanding performance and excellent catalytic activity: The average particle size of platinum nanoparticles is about 2.5&#xa0;nm, the proportion of Pt<sup>0</sup> components is 61.5%, and the catalytic exchange column efficiency reaches about 82.0% and remains stable within 160&#xa0;min. This study provides a new strategy for the preparation of Pt/SDB hydrophobic catalysts by low temperature reduction.</p>

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Ethylene glycol-assisted formaldehyde reduction of styrene-divinylbenzene loaded with Pt as an efficient catalyst for liquid-phase hydrogen isotopes catalytic exchange

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • Kun Fu,
  • Xilongju Xu,
  • Lei Zhu,
  • Cailin Liu,
  • Xianyan Ren,
  • Haijun Yang,
  • Shudong Lin

摘要

Pt/SDB is one of the promising catalysts used in liquid-phase catalytic exchange (LPCE) reaction to treat the tritium-containing wastewater produced by nuclear power generation. Mesoporous polystyrene-divinylbenzene (SDB) was prepared by suspension polymerization. With ethylene glycol and formaldehyde as reducing agents, a mild reduction method was developed to prepare the SDB-supported platinum (Pt) active particles, which was given as Pt/SDB-EG-PA. The structural morphology and catalytic activity were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption desorption, and hydrogen-water catalytic exchange experiments. The results show that the Pt/SDB-EG-PA hydrophobic catalyst has outstanding performance and excellent catalytic activity: The average particle size of platinum nanoparticles is about 2.5 nm, the proportion of Pt0 components is 61.5%, and the catalytic exchange column efficiency reaches about 82.0% and remains stable within 160 min. This study provides a new strategy for the preparation of Pt/SDB hydrophobic catalysts by low temperature reduction.