Carbon Deposition on Heterogeneous Pt Catalysts Promotes the Selective Hydrogenation of Halogenated Nitroaromatics,ACS Applied Materials & Interfaces

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Carbon Deposition on Heterogeneous Pt Catalysts Promotes the Selective Hydrogenation of Halogenated Nitroaromatics
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-08-09 , DOI: 10.1021/acsami.1c11548
Kaijia Li ₁ , Ruixuan Qin ₁ , Kunlong Liu ₁ , Wenting Zhou ₁ , Ning Liu ₁ , Yazhou Zhang ₁ , Shengjie Liu ₁ , Jie Chen ₁ , Gang Fu ₁ , Nanfeng Zheng ₁

Affiliation

Pt-based heterogeneous metal catalysts are commonly used in the hydrogenation of nitro groups. However, the continuous large metal domain size and the complex interaction between the substrates and metal surface usually inevitably result in side reactions, such as dehalogenation of halogenated nitroaromatics. In this work, by simply treating the Pt-based catalysts with CO at elevated temperature, the Boudouard reaction taking place on Pt surface results in the deposition of carbon species thereon. The carbon deposition not only inhibits the dehalogenation by restricting the planar interaction of the aromatic group with the Pt surface that is segmented by C, the hydrogenation activity of the nitro group is also enhanced on the partially positively charged surface Pt sites created by the electron-withdrawing interstitial C. Such a simple treatment strategy is effective for fabricating Pt-based catalysts on different supports toward the selective hydrogenation of a wide range of halogenated nitroaromatics.

中文翻译：

多相铂催化剂上的碳沉积促进卤代硝基芳烃的选择性加氢

Pt 基多相金属催化剂常用于硝基的加氢。然而，连续的大金属畴尺寸以及基材与金属表面之间复杂的相互作用通常不可避免地会导致副反应，例如卤代硝基芳烃的脱卤。在这项工作中，通过在升高的温度下用 CO 简单地处理 Pt 基催化剂，Pt 表面发生的 Boudouard 反应导致碳物质在其上沉积。碳沉积不仅通过限制芳基与被 C 分段的 Pt 表面的平面相互作用来抑制脱卤，而且硝基的氢化活性也在由电子产生的部分带正电的 Pt 位点上增强。撤回间隙 C.

更新日期：2021-08-09

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