Near-infrared-featured broadband CO 2 reduction with water to hydrocarbons by surface plasmon

Nature Communications(2023)

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Imitating the natural photosynthesis to synthesize hydrocarbon fuels represents a viable strategy for solar-to-chemical energy conversion, where utilizing low-energy photons, especially near-infrared photons, has been the ultimate yet challenging aim to further improving conversion efficiency. Plasmonic metals have proven their ability in absorbing low-energy photons, however, it remains an obstacle in effectively coupling this energy into reactant molecules. Here we report the broadband plasmon-induced CO 2 reduction reaction with water, which achieves a CH 4 production rate of 0.55 mmol g −1 h −1 with 100% selectivity to hydrocarbon products under 400 mW cm −2 full-spectrum light illumination and an apparent quantum efficiency of 0.38% at 800 nm illumination. We find that the enhanced local electric field plays an irreplaceable role in efficient multiphoton absorption and selective energy transfer for such an excellent light-driven catalytic performance. This work paves the way to the technique for low-energy photon utilization.
Artificial photosynthesis,Catalytic mechanisms,Characterization and analytical techniques,Photocatalysis,Science,Humanities and Social Sciences,multidisciplinary
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