Energy shortages and global warming are two main problems the world is currently facing. Photocatalytic CO₂ reduction is one of the most promising solutions to the above issues. Among the various photocatalysts, faceted TiO₂ crystals have attracted wide attention due to their excellent photocatalytic performance for CO₂ reduction. This review encompasses the recent advances in the application of facet-engineered TiO₂-based catalysts for CO₂ photocatalytic reduction. The review begins with the fundamentals of CO₂ photocatalytic reduction over TiO₂. In the following section, we discuss the surface atom structure and electronic structure of faceted TiO₂ crystals and the related the CO₂/water adsorption and charge transfer/separation properties. Then, we outline the modification strategies for faceted TiO₂ and their influence on the CO₂ photocatalytic reduction performance. Finally, a summary and the future perspectives of facet-engineered TiO₂ photocatalysts for CO₂ photoreduction are presented.

能源短缺和全球变暖是世界目前面临的两个主要问题。光催化CO ₂还原是解决上述问题的最有希望的解决方案之一。在各种光催化剂中，多面的TiO ₂晶体由于其优异的用于还原CO _2的光催化性能而引起了广泛的关注。这篇综述涵盖了面工程化的基于TiO ₂的催化剂在CO ₂光催化还原中的最新进展。综述从CO ₂光催化还原TiO ₂的基本原理开始。在以下部分中，我们讨论了刻面TiO的表面原子结构和电子结构_2种晶体及其相关的CO ₂ /水吸附和电荷转移/分离特性。然后，我们概述了刻面TiO ₂的改性策略及其对CO ₂光催化还原性能的影响。最后，概述了面向面设计的用于CO ₂光还原的TiO ₂光催化剂。