Using renewable solar energy to CO₂ conversion to chemical fuels has been widely perceived as an alternative solution for simultaneously tackling the energy crisis and the greenhouse effect. Herein, the selectivity of the photothermocataltytic CO₂ reduction with H₂O vapor by single‐atom dispersed‐Ru loaded CdS is regulated. Under full solar spectrum irradiation, CO as the main product with 97.2% selectivity is observed on bare CdS, whereas the intentional introduction of optimized amount of Ru metal enables CO₂ reduction to CH₄ with 97.6% selectivity. A series of experiments and characterizations reveal that the single‐atom dispersed Ru serves as adsorption and active sites of CO₂ molecules as well as electron traps, resulting in great improvement in CO₂ uptake capability of the catalyst and the effective suppression in the recombination of photogenerated carriers. Moreover, the thermal effect synchronously induced by light has a positive influence on photocatalysis, which can prominently enhance the catalytic activity without altering the product selectivity.

中文翻译：

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将单原子Ru固定在CdS上，具有增强的CO2捕集和电荷积累功能，以高选择性地将光热催化CO2还原为太阳能燃料

使用可再生太阳能将CO ₂转换为化学燃料已被广泛认为是同时解决能源危机和温室效应的替代解决方案。在此，通过单原子分散Ru负载的CdS的H ₂ O蒸气还原光热催化CO ₂的选择性受到调节。在完整的太阳光谱辐射下，在裸露的CdS上观察到以97.2％的选择性为主要产物的CO，而有意引入优化量的Ru金属可使CO ₂以97.6％的选择性还原为CH ₄。一系列实验和表征表明，单原子分散的Ru充当CO _2的吸附和活性位点分子以及电子陷阱，从而大大提高了催化剂对CO _2的吸收能力，并有效抑制了光生载流子的重组。此外，由光同步引发的热效应对光催化具有积极影响，可以显着提高催化活性，而不会改变产物的选择性。