Photothermal CO2 conversion to ethanol through photothermal heterojunction-nanosheet arrays

作者：Xiaodong Li, Li Li, Xingyuan Chu, Xiaohui Liu, Guangbo Chen, Quanquan Guo, Zhen Zhang, Mingchao Wang, Shuming Wang, Alexander Tahn, Yongfu Sun, Xinliang Feng · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-49928-0 · 被引用次数：83 · 研究领域：Advanced Photocatalysis Techniques、CO2 Reduction Techniques and Catalysts、Catalytic Processes in Materials Science

Abstract Photothermal CO 2 conversion to ethanol offers a sustainable solution for achieving net-zero carbon management. However, serious carrier recombination and high C-C coupling energy barrier cause poor performance in ethanol generation. Here, we report a Cu/Cu 2 Se-Cu 2 O heterojunction-nanosheet array, showcasing a good ethanol yield under visible–near-infrared light without external heating. The Z-scheme Cu 2 Se-Cu 2 O heterostructure provides spatially separated sites for CO 2 reduction and water oxidation with boosted carrier transport efficiency. The microreactors induced by Cu 2 Se nanosheets improve the local concentration of intermediates (CH 3 * and CO*), thereby promoting C-C coupling process. Photothermal effect of Cu 2 Se nanosheets elevates system’s temperature to around 200 ° C. Through synergizing electron and heat flows, we achieve an ethanol generation rate of 149.45 µmol g −1 h −1 , with an electron selectivity of 48.75% and an apparent quantum yield of 0.286%. Our work can serve as inspiration for developing photothermal catalysts for CO 2 conversion into multi-carbon chemicals using solar energy.