Yang Jingyi, Zhang Jingcai, Jiang Qike, Su Yang, Cui Yitao, Li Xianquan, Zhang Shengxin, Li Weizhen, Qiao Botao
CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian 116023, China.
J Chem Phys. 2021 Apr 7;154(13):131105. doi: 10.1063/5.0048565.
Single-atom catalysts (SACs) prepared by the atom trapping method often possess high stability yet have limited advantages regarding catalytic performance due to the strong metal-support interaction. Using these SACs as seeds to develop supported nanoclusters or nanoparticles has, however, been proven to be effective in improving the catalysts' intrinsic activity. Herein, we have prepared extremely stable Ir SACs supported by MgAlO via atomic trapping and used them as seeds to fabricate highly active and stable Ir nanocluster catalysts by high-temperature reduction. The activity toward NO decomposition increased by more than ten times compared with that of the parent Ir SACs. This study provides a new avenue to design and develop highly active and stable catalysts for industrial use.
通过原子捕获法制备的单原子催化剂（SACs）通常具有较高的稳定性，但由于金属-载体相互作用较强，其催化性能方面的优势有限。然而，已证明将这些SACs用作种子来制备负载型纳米团簇或纳米颗粒可有效提高催化剂的本征活性。在此，我们通过原子捕获制备了由MgAlO负载的极其稳定的Ir SACs，并将其用作种子，通过高温还原制备出高活性和高稳定性的Ir纳米团簇催化剂。与母体Ir SACs相比，其对NO分解的活性提高了十多倍。该研究为设计和开发用于工业用途的高活性和稳定催化剂提供了一条新途径。
