CeO₂ nanomaterials, known for the abundant oxygen vacancies, strong interaction with metals, and controllable synthesis with different exposed crystal facets, serve as one of the most important catalyst supports in heterogeneous catalysis. The CeO₂-supported catalysts, especially noble-metal catalysts, have drawn intensive research interests because of their huge significance in both basic academic studies and practical applications. In this review, we summarize the recent progress of highly efficient catalysts where noble-metal single atoms or nanoclusters are supported on CeO₂. The catalysts are categorized in terms of the supported noble metals. The uniqueness of applying CeO₂ supports for noble-metal sites is discussed, as well as the synthetic strategies. The extraordinary catalytic performances of highly dispersed noble-metal sites on CeO₂ are summarized for many reactions, including CO oxidation, water-gas shift reaction, hydroformylation, CH₄ conversion, and NH₃ synthesis/decomposition. Lastly, perspectives and challenges are concluded as guidance for the future development in this field.

CeO ₂纳米材料以其丰富的氧空位、与金属的强相互作用以及具有不同暴露晶面的可控合成而闻名，是多相催化中最重要的催化剂载体之一。CeO ₂负载催化剂，尤其是贵金属催化剂，因其在基础学术研究和实际应用中的巨大意义而引起了广泛的研究兴趣。_{在这篇综述中，我们总结了在 CeO 2}上负载贵金属单原子或纳米团簇的高效催化剂的最新进展。催化剂按负载的贵金属分类。应用CeO _{2的独特性}讨论了贵金属位点的载体以及合成策略。_{总结了CeO 2}上高度分散的贵金属位点对许多反应的非凡催化性能，包括CO 氧化、水煤气变换反应、加氢甲酰化、CH ₄转化和NH ₃合成/分解。最后，总结了观点和挑战，作为该领域未来发展的指导。