Artificial photosynthesis of clean fuels shows fascinating prospects for solving the energy crisis and environmental pollution. However, the solar conversion efficiency is too low to fulfill industrialization requirements, which is confined by the poor photon utilization, severe recombination of electrons and holes, and insufficient reactive sites. Fortunately, junction engineering displays outstanding performance in conquering the aforementioned problems. Herein, an updated fundamental understanding of various junction engineering for enhancing the efficiency, selectivity, and stability of solar‐driven CO₂ reduction is provided. The recent progresses of heterojunctions, homojunctions, and multijunctions for photocatalytic (PC) and photoelectrochemical (PEC) CO₂ reduction are focused on, especially their essential roles in facilitating the key PC or PEC processes, including charge separation and transfer, adsorption and activation of CO₂, and desorption of products, which may provide an interactively referential development pathway for CO₂ photoreduction. Finally, an outlook on the current challenges and perspectives of junction engineering design of photocatalysts for solar‐driven CO₂ reduction is provided.

中文翻译：

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用于光催化和光电催化还原CO2的结工程

清洁燃料的人工光合作用显示了解决能源危机和环境污染的迷人前景。然而，太阳能转换效率太低而不能满足工业化要求，这受限于光子利用率差，电子与空穴的严重复合以及反应位点不足。幸运的是，接合点工程在克服上述问题方面显示出卓越的性能。本文提供了对各种结工程技术的最新基础知识，以提高太阳能驱动的CO ₂还原效率，选择性和稳定性。异质结，同质结和多结在光催化（PC）和光电化学（PEC）CO _2中的最新进展减少的重点是，尤其是它们在促进关键PC或PEC过程中的基本作用，包括电荷分离和转移，CO _2的吸附和活化以及产物的解吸，这可能为CO _2的光还原提供交互式的参考发展途径。最后，展望了用于太阳能驱动的CO ₂还原的光催化剂的结工程设计的当前挑战和前景。