Laboratory for Advanced Carbon Nanomaterials, Chemical Institute, Kazan Federal University, Kremlyovskaya Str. 18, 420008 Kazan, Russia.
Advanced Imaging Core Facility, Skolkovo Institute of Science and Technology, 121205 Moscow, Russia.
Molecules. 2022 Sep 1;27(17):5637. doi: 10.3390/molecules27175637.
The reduction of -nitrophenol to -aminophenol has become a benchmark reaction for testing the efficiency of new catalytic systems. In this study, we use oxidatively modified carbon (OMC) as a structural support to develop a new cost-efficient nickel-based catalytic system. The newly developed material comprises single nickel ions, chemically bound to the oxygen functional groups on the OMC surface. The highly oxidized character of OMC ensures the high lateral density of nickel ions on its surface at relatively low nickel content. We demonstrate excellent catalytic properties of the new material by using it as a stationary phase in a prototype of a continuous flow reactor: the reagent fed into the reactor is -nitrophenol, and the product, exiting the reactor, is the fully converted -aminophenol. The catalytic properties of the new catalyst are associated with its specific morphology, and with high lateral density of active sites on the surface. The reaction can be considered as an example of single-atom catalysis. The resulting material can be used as an inexpensive but efficient catalyst for industrial wastewater treatment. The study opens the doors for the synthesis of a new series of catalytic systems comprising transition metal atoms on the OMC structural support.
-硝基酚还原为-氨基酚已成为测试新型催化体系效率的基准反应。在这项研究中，我们使用氧化改性碳（OMC）作为结构支撑，开发了一种新的具有成本效益的基于镍的催化体系。新开发的材料包含单镍离子，化学结合在 OMC 表面的氧官能团上。OMC 的高度氧化性质确保了在相对较低的镍含量下，其表面上镍离子的高横向密度。我们通过将其用作连续流动反应器原型中的固定相来证明新材料的优异催化性能：进入反应器的试剂是-硝基酚，而离开反应器的产物是完全转化的-氨基酚。新催化剂的催化性能与其特定形态以及表面上高活性位的横向密度有关。该反应可被视为单原子催化的一个例子。所得材料可用作处理工业废水的廉价但高效的催化剂。该研究为在 OMC 结构支撑上合成包含过渡金属原子的新型催化体系开辟了道路。
