Metal element doping or loading on cerium dioxide (ceria, CeO₂) to form metal/CeO₂ heterogeneous catalysts, in which CeO₂ acts as the active component, support and promoter, has proven to be an excellent catalytic system with a wide range of applications. Over the past few decades, many metal/CeO₂ catalysts composed of different metals and CeO₂ have been prepared for air pollution control. Moreover, the structure–activity relationship and catalytic mechanism of metal/CeO₂ were scrutinized through theoretical calculation based on density functional theory (DFT) and various advanced physicochemical analysis methods. Thus, a timely review of the recent advances is necessary to inspire further research. The main aim of this review is to summarize the recent research progress of metal/CeO₂ catalysts in the field of air pollution control, especially the removal of volatile organic compounds (VOCs), particulate matter (soot), NO_x, elemental mercury (Hg⁰), and hydrocarbons. The important role of interfacial interactions and oxygen vacancies (OVs) in the catalytic process is emphasized. In addition, the mechanism of the metal/CeO₂ catalytic system is concisely presented based on the simulated properties of theoretical calculations as well as scientific design guidance for scenario-specific applications of metal/CeO₂ catalysts. Finally, perspectives based on the research status of metal/CeO₂ catalysts are proposed to provide reference and inspiration for the application of metal/CeO₂ catalysts in air pollution control.

中文翻译：

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用于空气污染控制的金属/二氧化铈催化剂的最新进展：机理洞察与应用

在二氧化铈（二氧化铈，CeO ₂）上掺杂或负载金属元素形成金属/CeO ₂多相催化剂，其中CeO ₂作为活性组分、载体和促进剂，已被证明是一种优异的催化体系，具有广泛的催化活性。应用程序。在过去的几十年里，许多由不同金属和CeO ₂组成的金属/CeO ₂催化剂已被制备用于空气污染控制。此外，金属/CeO ₂的构效关系和催化机理通过基于密度泛函理论 (DFT) 的理论计算和各种先进的理化分析方法来仔细检查。因此，有必要及时回顾最近的进展，以激发进一步的研究。本综述的主要目的是总结近年来金属/CeO ₂催化剂在空气污染控制领域的研究进展，特别是去除挥发性有机化合物（VOCs）、颗粒物（烟尘）、NO _x、元素汞（ Hg ⁰ ) 和碳氢化合物。强调了界面相互作用和氧空位（OVs）在催化过程中的重要作用。此外，金属/CeO ₂的机理基于理论计算的模拟性能以及金属/CeO ₂催化剂特定场景应用的科学设计指导，简明地介绍了催化体系。最后，基于金属/CeO ₂催化剂的研究现状提出展望，为金属/CeO ₂催化剂在大气污染治理中的应用提供参考和启示。