期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 44, 页码 52193-52201出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c11548
关键词
Boudouard reaction; interstitial carbon; selective hydrogenation; nitro group hydrogenation; hydrodechlorination
资金
- National Key R&D Program of China [2017YFA0207304]
- NNSF of China [21890752, 21731005, 21721001, 21573178, 21773192, 91845102]
- fundamental research funds for central universities [20720180026]
- China Postdoctoral Science Foundation [2021T140394, 2021M691877, 2020M682081]
Treating Pt-based catalysts with CO at elevated temperature promotes the deposition of carbon species on the Pt surface, which inhibits dehalogenation reactions and enhances the hydrogenation activity of nitro groups. This treatment strategy effectively fabricates Pt-based catalysts on different supports for selective hydrogenation of a wide range of halogenated nitroaromatics.
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.
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