The catalytic behaviour of ceria (cerium (IV) Oxide; CeO₂) incorporated with trace metals, metallic particles or mixed support systems has been studied extensively for various heterogeneous reactions. Moreover, unique redox properties and structural defects have made ceria a desirable choice for selective hydrogenation reactions. This paper provides the first review of studies focusing on the performance of ceria in selective catalytic hydrogenation. The review covers the fundamentals, economic benefits, and application of ceria in the aforementioned reaction, highlighting the theoretical basis and importance of non-stoichiometric forms of ceria (CeO_2-x). We have contrasted the effect of operational parameters and molecular alterations as documented in the literature, and constructed the mechanistic and kinetic insights on the heterogeneous hydrogenation over ceria. The remarks in this review provide necessary future outlooks, recommendations, and plausaible improvements on the catalytic performance of ceria.

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中文翻译：

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基于二氧化铈的选择性加氢反应催化剂的评论

掺有痕量金属，金属颗粒或混合载体体系的二氧化铈（氧化铈（CeO ₂）； CeO ₂）的催化行为已被广泛研究用于各种非均相反应。而且，独特的氧化还原特性和结构缺陷使二氧化铈成为选择性氢化反应的理想选择。本文提供了有关二氧化铈在选择性催化加氢中的性能研究的第一篇综述。审查涵盖了二氧化铈在上述反应中的基本原理，经济利益和应用，强调了非化学计量形式的二氧化铈（CeO _{2- x}）。我们已经对比了文献中记录的操作参数和分子改变的影响，并构建了关于二氧化铈异质氢化的机理和动力学见解。本文的评论为二氧化铈的催化性能提供了必要的未来前景，建议和合理的改进。

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