This review covers the structure of, and chemical reactions on, well-defined cerium oxide surfaces. Ceria, or mixed oxides containing ceria, are critical components in automotive three-way catalysts due to their well-known oxygen storage capacity. Ceria is also emerging as an important material in a number of other catalytic processes, particularly those involving organic oxygenates and the water–gas shift reaction. Ceria׳s acid–base properties, and thus its catalytic behavior, are closely related to its surface structure where different oxygen anion and cerium cation environments are present on the low-index structural faces. The actual structure of these various faces has been the focus of a number of theoretical and experimental investigations. Ceria is also easily reducible from CeO₂ to CeO_2−X. The presence of oxygen vacancies on the surface often dramatically alters the adsorption and subsequent reactions of various adsorbates, either on a clean surface or on metal particles supported on the surface. Most surface science studies have been conducted on the surfaces of thin-films rather than on the surfaces of bulk single crystal oxides. The growth, characterization and properties of these thin-films are also examined.

这篇综述涵盖了明确定义的氧化铈表面的结构和化学反应。二氧化铈或含有二氧化铈的混合氧化物由于其众所周知的储氧能力而成为汽车三效催化剂中的关键组分。在许多其他催化过程中，尤其是涉及有机氧化物和水煤气变换反应的催化过程中，二氧化铈也正在成为重要的材料。二氧化铈的酸碱性质及其催化性能与低折射率结构面上存在不同氧阴离子和铈阳离子环境的表面结构密切相关。这些不同面孔的实际结构一直是许多理论和实验研究的重点。二氧化铈也很容易从CeO ₂还原为CeO _2−X。表面上氧空位的存在通常会显着改变清​​洁表面上或负载在表面上的金属颗粒上各种被吸附物的吸附和随后的反应。大多数表面科学研究是在薄膜表面上进行的，而不是在块状单晶氧化物的表面上进行的。还检查了这些薄膜的生长，特征和性质。