Scholarlink

<p>In this work, <i>fcc</i> Pd–B alloy mesoporous nanospheres (MNSs) were synthesized and supported onto alumina (Pd–B/Al<sub>2</sub>O<sub>3</sub>) for catalytic hydrogenation of nitrobenzene to aniline, where Pd–B MNSs were prepared by a co-reduction method using dioctadecyldimethylammonium chloride as the surfactants and borane dimethylamine complex as reducing agents as well as B sources. Compared with alumina supported Pd MNSs, Pd–B/Al<sub>2</sub>O<sub>3</sub> demonstrated a much higher hydrogenation activity. Under a nitrobenzene/Pd molar ratio of 2000/1, 0.1&#xa0;MPa of H<sub>2</sub> and 45&#xa0;°C, the yields of aniline could reach nearly 100% during 70&#xa0;min. The improved catalytic efficiency originates from the synergistic effect between B and Pd, where alloying Pd with B enlarges the Pd–Pd distance and alters the geometric and electronic properties of surface Pd species, resulting in enhanced activities for nitrobenzene hydrogenation.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Supported Pd–B alloy mesoporous nanospheres as efficient catalysts for nitrobenzene hydrogenation

  • 期刊论文

  • 发表日期：

    2025年1月7日

查看全文
  • Yunkai Zhang,
  • Lei Wang,
  • Shenghu Zhou

摘要

In this work, fcc Pd–B alloy mesoporous nanospheres (MNSs) were synthesized and supported onto alumina (Pd–B/Al2O3) for catalytic hydrogenation of nitrobenzene to aniline, where Pd–B MNSs were prepared by a co-reduction method using dioctadecyldimethylammonium chloride as the surfactants and borane dimethylamine complex as reducing agents as well as B sources. Compared with alumina supported Pd MNSs, Pd–B/Al2O3 demonstrated a much higher hydrogenation activity. Under a nitrobenzene/Pd molar ratio of 2000/1, 0.1 MPa of H2 and 45 °C, the yields of aniline could reach nearly 100% during 70 min. The improved catalytic efficiency originates from the synergistic effect between B and Pd, where alloying Pd with B enlarges the Pd–Pd distance and alters the geometric and electronic properties of surface Pd species, resulting in enhanced activities for nitrobenzene hydrogenation.