Hybrid Nanostructure Catalyst with Low Loading of Pt for the High-Efficiency Catalytic Hydrogenation of Chloronitrobenzene,Langmuir

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Hybrid Nanostructure Catalyst with Low Loading of Pt for the High-Efficiency Catalytic Hydrogenation of Chloronitrobenzene
Langmuir ( IF 3.7 ) Pub Date : 2022-06-14 , DOI: 10.1021/acs.langmuir.2c00531
Yanji Zhang _{1,

2} , Jicheng Zhou ₂ , Fei Wang ₂ , Xingxing Zhao ₂

Affiliation

Fabrication of low-loading, noble-metal, stable, and high-performance metal catalysts remains a thorny issue. Herein, we demonstrate the successful formation of a hybrid nanostructure Pt/TiO₂/SBA-15 catalyst (denoted as HNSC-P/T/S; Pt, 0.09%; TiO₂, 10%) with satisfactory activity in the hydrogenation of para-chloronitrobenzene (p-CNB). The HNSC-P/T/S showed >99% conversion and a high selectivity of >98%, and the turnover frequency number (TOF) reached 66 766 h^–1, which was impossible to achieve with Pt/TiO₂ (denoted as P/T) or Pt/SBA-15 (denoted as P/S). The success of the catalytic activity of the HNSC-P/T/S mainly relies on its synergistic effect and special structure, which can fully develop the catalytic ability of Pt, thereby reducing the Pt loading in the noble-based catalyst. Furthermore, the HNSC-P/T/S could also achieve an excellent catalytic activity in the hydrogenation of other nitroarenes. Hence, this work proposes a direction to prepare a noble-based catalyst with a low loading of noble metals for diverse applications.

中文翻译：

低负载铂杂化纳米结构催化剂用于氯硝基苯的高效催化加氢

制备低负载、贵金属、稳定和高性能的金属催化剂仍然是一个棘手的问题。在此，我们证明了混合纳米结构 Pt/TiO ₂ /SBA-15 催化剂的成功形成（表示为 HNSC-P/T/S；Pt，0.09%；TiO _{2 ，10%）在对}位加氢中具有令人满意的活性。 -氯硝基苯（对-CNB）。HNSC-P/T/S显示出>99%的转化率和>98%的高选择性，转换频率数（TOF）达到66 766 h ^{–1 ，这是Pt/TiO}₂无法实现的（表示为 P/T）或 Pt/SBA-15（表示为 P/S）。HNSC-P/T/S催化活性的成功主要依靠其协同效应和特殊结构，可以充分发挥Pt的催化能力，从而降低贵金属催化剂中Pt的负载量。此外，HNSC-P/T/S在其他硝基芳烃的加氢反应中也具有优异的催化活性。因此，这项工作提出了一个方向，即制备一种用于多种应用的低负载贵金属的贵金属催化剂。

更新日期：2022-06-14

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