Long Siyu, Zhang Lingyu, Liu Zhuoyue, Jiao Huibin, Lei Aiwen, Gong Wei, Pei Xianglin
School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China.
Guizhou Key Laboratory of Inorganic Nonmetallic Functional Materials, Guizhou Normal University, Guiyang 550025, China.
Nanomaterials (Basel). 2022 Aug 27;12(17):2968. doi: 10.3390/nano12172968.
The hydrogenation products of aromatic molecules with reducible groups (such as C=C, NO, C=O, etc.) are relatively critical intermediate compounds in fine chemicals, but how to accurately reduce only specific groups is still challenging. In this work, a bimetallic Pt-Ni/Chitin catalyst was prepared for the first time by using renewable biomass resource chitin as support. As the carrier, the chitin was constructed into porous nanofibrous microspheres through the sol-gel strategy, which was favorable for the adhesion of nano-metals and the exchange of reactive substances due to its large surface area, porous structure, and rich functional groups. Then the Pt-Ni/Chitin catalyst was applied to selective hydrogenation with the model substrate of 4-nitrostyrene. As the highly dispersed Pt-Ni NPs with abundant exposed active sites and the synergistic effect of bimetals, the Pt-Ni/Chitin catalyst could efficiently and selectively hydrogenate only NO or C=C with yields of ~99% and TOF of 660 h, as well as good stability. This utilization of biomass resources to build catalyst materials would be important for the green and sustainable chemistry.
含有可还原基团（如C=C、NO、C=O等）的芳香族分子的氢化产物是精细化学品中相对关键的中间化合物，但如何仅精确还原特定基团仍然具有挑战性。在这项工作中，首次以可再生生物质资源几丁质为载体，制备了双金属Pt-Ni/几丁质催化剂。作为载体，几丁质通过溶胶-凝胶策略构建成多孔纳米纤维微球，由于其大表面积、多孔结构和丰富的官能团，有利于纳米金属的附着和反应性物质的交换。然后将Pt-Ni/几丁质催化剂应用于以4-硝基苯乙烯为模型底物的选择性氢化反应。作为具有大量暴露活性位点的高度分散的Pt-Ni纳米颗粒以及双金属的协同作用，Pt-Ni/几丁质催化剂能够高效且选择性地仅将NO或C=C氢化，产率约为99%，TOF为660 h-1，并且具有良好的稳定性。这种利用生物质资源构建催化剂材料的方法对绿色和可持续化学具有重要意义。
