Highly Selective Hydrogenation of Nitroaromatics over Pt/TiO2@S‐1 catalyst with Inlaid Strong Metal‐Support Interaction. Issue 10 (31st August 2022) - Liu, Mengmeng
Abstract: The encapsulation of metal nanoparticles (NPs)‐based active sites and homogeneous catalysts in nanoporous materials has been of highly research focus for tuning their catalytic activity, selectivity and stability. Although the catalysts with strong metal‐support interaction (SMSI) hold the reversible encapsulation feature in a certain atmosphere, there is still a lack of systematic research on them in a real confined environment. Herein, we present a highly selective and stable Pt/TiO2 @S‐1 catalyst, which is prepared by in‐situ growth of classical silicalite‐1 on the external surface of Pt/TiO2 ‐450H pre‐catalyst with SMSI effect. Encouragingly, the encapsulated 20Pt/TiO2 @S‐1 catalyst demonstrates unprecedented catalytic performance for various nitroaromatics and without any degradation in selectivity after 7 cycles (>99%) for the hydrogenation of 1‐chloro‐4‐nitrobenzene. Such situation is attributed to the high surface area, SMSI effect in confined space as well as the pore structure of silicalite‐1 with selective adsorption of substrates. Abstract : The encapsulation of Pt/TiO2 ‐450H catalyst with SMSI into zeolite silicalite‐1 (S‐1) is reported. The resulting Pt/TiO2 @S‐1 catalyst dispalyed superior catalytic performance especially for halogenated nitroaromatics and without degradation in selectivity after 7 cycles. It is attributed to the high surface area, SMSI effect in confined space and the pore structure of S‐1 with selective adsorption of substrates.