贵金属单原子催化剂的制备及其在CO、VOCs完全氧化反应中的应用北大核心CSCD

为有效提高负载型催化剂中贵金属的原子利用效率,贵金属单原子催化剂逐渐成为一个研究热点和前沿课题.我们针对单原子催化剂在催化氧化领域中的应用,综述了几种贵金属单原子催化剂的典型制备方法,包括原子层沉积法、湿法化学法、光化学辅助法、热解法等,并讨论了上述方法的优缺点.此外,对比传统贵金属负载型催化剂,我们重点讨论了贵金属基单原子催化剂在CO催化氧化、挥发性有机化合物(VOCs)催化氧化、催化机理等催化氧化过程中的最新研究进展,尤其是贵金属基单原子催化剂在低温低浓度催化氧化过程中表现出的优异催化活性、抗水性和抗毒性,表明该类催化剂具备极大的工业应用潜力.最后,进一步从大规模工业应用角度探讨了单原子催化剂目前面临的挑战和可能的解决办法,期望可以为应用于催化氧化过程的高效、稳定的单原子催化剂的设计提供思路.

Preparation of Noble Metal Single-Atom Catalyst and Its Applications in Catalytic Oxidation Reaction of CO and VOCs

In order to improve the utilization efficiency of noble metal atoms in supported catalysts, noble metal single-atom catalyst (NM-SAC) is becoming a research hotspot and frontier subject. Aiming at the applications of NM-SACs in the field of catalytic oxidation, this review summarizes several typical synthesis methods of NM-SACs, including atomic layer deposition, wet chemical methods, photochemical assisted methods, and pyrolysis methods, on top of the discussion about their advantages and disadvantages. In addition, this review focuses on the latest research progress of NM-SACs applied in the catalytic oxidation of CO and volatile organic compounds (VOCs), in comparison with traditional noble metal supported catalysts, where the NM-SACs have exhibited excellent catalytic activity, water resistance and anti-toxicity even in presence of low gas concentration and low temperature. And thus, this seemingly corroborates the great industrialization potential of NM-SACs in catalytic oxidation. Finally, this review further discusses the current challenges and possible solutions for single-atom catalysts from the perspective of large-scale industrial applications, hoping to provide insights into the design of efficient and stable NM-SACs for catalytic oxidation processes.