离子液体
光化学
丙烷
乙炔
碳氢化合物
丙烯
等离子体子
纳米颗粒
甲烷
化学
人工光合作用
离子键合
化学物理
材料科学
化学工程
纳米技术
有机化学
催化作用
光催化
离子
光电子学
工程类
作者
Sungju Yu,Prashant K. Jain
标识
DOI:10.1038/s41467-019-10084-5
摘要
Abstract Photochemical conversion of CO 2 into fuels has promise as a strategy for storage of intermittent solar energy in the form of chemical bonds. However, higher-energy-value hydrocarbons are rarely produced by this strategy, because of kinetic challenges. Here we demonstrate a strategy for green-light-driven synthesis of C 1 –C 3 hydrocarbons from CO 2 and H 2 O. In this approach, plasmonic excitation of Au nanoparticles produces a charge-rich environment at the nanoparticle/solution interface conducive for CO 2 activation, while an ionic liquid stabilizes charged intermediates formed at this interface, facilitating multi-step reduction and C–C coupling. Methane, ethylene, acetylene, propane, and propene are photosynthesized with a C 2+ selectivity of ~50% under the most optimal conditions. Hydrocarbon turnover exhibits a volcano relationship as a function of the ionic liquid concentration, the kinetic analysis of which coupled with density functional theory simulations provides mechanistic insights into the synergy between plasmonic excitation and the ionic liquid.
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