CO₂ conversion into value‐added chemical fuels driven by solar energy is an intriguing approach to address the current and future demand of energy supply. Currently, most reported surface‐sensitized heterogeneous photocatalysts present poor activity and selectivity under visible light irradiation. Here, photosensitized porous metallic and magnetic 1200 CoC composites (PMMCoCC‐1200) are coupled with a [Ru(bpy)₃]Cl₂ photosensitizer to efficiently reduce CO₂ under visible‐light irradiation in a selective and sustainable way. As a result, the CO production reaches a high yield of 1258.30 µL with selectivity of 64.21% in 6 h, superior to most reported heterogeneous photocatalysts. Systematic investigation demonstrates that the central metal cobalt is the active site for activating the adsorbed CO₂ molecules and the surficial graphite carbon coating on cobalt metal is crucial for transferring the electrons from the triplet metal‐to‐ligand charge transfer of the photosensitizer Ru(bpy)₃²⁺, which gives rise to significant enhancement for CO₂ reduction efficiency. The fast electron injection from the excited Ru(bpy)₃²⁺ to PMMCoCC‐1200 and the slow backward charge recombination result in a long‐lived, charge‐separated state for CO₂ reduction. More impressively, the long‐time stability and easy magnetic recycling ability of this metallic photocatalyst offer more benefits to the photocatalytic field.

中文翻译：

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金属钴-碳复合材料作为可回收且坚固的磁性光催化剂，可有效降低CO2排放量

将CO ₂转化为太阳能驱动的增值化学燃料是解决当前和未来能源供应需求的一种有趣方法。当前，大多数报道的表面敏化非均相光催化剂在可见光照射下表现出较差的活性和选择性。在这里，光敏金属多孔和磁1200个钴 C复合材料（PMMCoCC-1200）耦合用的[Ru（联吡啶）₃ ]氯₂光敏剂有效地降低CO ₂在可见光辐射下以选择性和可持续的方式进行。结果，CO的产量在6小时内达到了1258.30 µL的高产率，选择性为64.21％，优于大多数报道的非均相光催化剂。系统研究表明，中心金属钴是激活吸附的CO ₂分子的活性位点，钴金属表面的石墨碳涂层对于光敏剂Ru（bpy ）₃ ²⁺，从而大大提高了CO _2的还原效率。激发Ru（bpy）₃ ²⁺的快速电子注入达到PMMCoCC-1200的水平，缓慢的反向电荷重组导致了CO ₂还原的长寿命，电荷分离状态。更令人印象深刻的是，这种金属光催化剂的长期稳定性和易于磁回收的能力为光催化领域提供了更多好处。