Zheng Yaru, Zhang Ling, Jiang Hao, Li Chunzhong, Hu Yanjie
Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Environmental Friendly Materials Technical Service Platform, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China.
Small. 2024 Jul;20(28):e2311346. doi: 10.1002/smll.202311346. Epub 2024 Feb 2.
Single-atom catalysts (SACs) exhibit remarkable catalytic activity at each metal site. However, conventionally synthesized single-atom catalysts often possess low metal loading, thereby constraining their overall catalytic performance. Here, a flame spray pyrolysis (FSP) method for the synthesis of a single-atom catalyst with a high loading capacity of up to 1.4 wt.% in practice is reported. CeZrO acts as a carrier and provides a large number of anchoring sites, which promotes the high-density generation of Pd, and the strong interaction between the metal and the support avoids atom aggregation. Pd-CeZrO series catalysts have excellent CO oxidation performance. When 0.97 wt.% Pd is added, the catalytic activity is the highest, and the temperature can be reduced to 120 °C. This work presented here demonstrates that FSP, as an inherently scalable technique, allows for elevating the single-atom loading to achieve an increase in its catalytic performance. The method presented here more options for the preparation of SACs.
单原子催化剂（SACs）在每个金属位点都表现出卓越的催化活性。然而，传统合成的单原子催化剂通常金属负载量较低，从而限制了它们的整体催化性能。在此，报道了一种火焰喷雾热解（FSP）方法，用于实际合成负载量高达1.4 wt.%的高负载单原子催化剂。CeZrO用作载体并提供大量锚定位点，这促进了Pd的高密度生成，并且金属与载体之间的强相互作用避免了原子聚集。Pd-CeZrO系列催化剂具有优异的CO氧化性能。当添加0.97 wt.%的Pd时，催化活性最高，温度可降至120°C。本文介绍的这项工作表明，FSP作为一种本质上可扩展的技术，能够提高单原子负载量以实现其催化性能的提升。本文提出的方法为单原子催化剂的制备提供了更多选择。
