Photothermal catalysis represents an emerging technology for solar energy conversion that combines the principles and advantages of photoand thermal catalytic mechanisms[1–5].Driven by the inter/intra-band transition...Photothermal catalysis represents an emerging technology for solar energy conversion that combines the principles and advantages of photoand thermal catalytic mechanisms[1–5].Driven by the inter/intra-band transitions and subsequent electron-phonon scattering processes,photothermal catalysts can achieve rapid and highly localized heating,providing thermal activation to the chemical conversions.Besides,direct participation of photo-generated charge carriers could also drastically reduce the activation energy barriers and modulate the catalytic pathways.However,distinction between thermal and non-thermal contributions remains a key challenge for both fundamental understandings and large-scale applications of photothermal catalysis[6,7].This issue is largely due to a lack of precise in-situ surface-temperature measurement techniques that accurately quantify the light-to-heat conversion under reaction conditions at the nanoscale.Conventional macroscopic temperature measurement techniques,such as infrared cameras and thermocouples,suffer from the lack of spatiotemporal resolutions required for the localized photothermal conversion.They are,thus,measuring an average temperature of the ambient medium.Besides,they typically cannot be applied in in-situ temperature measurements,which is crucial since inaccurate heat dissipation rates may be predicted by ex-situ temperature measurement techniques.For instance,differences in gas pressure,composition and flow rate could lead to significantly different convective heat fluxes.展开更多
基金support from the National Natural Science Foundation of China(22302137,52172221,52272229,51920105005)the Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices(ZZ2201)+1 种基金the Suzhou Key Laboratory of Advanced Photonic Materialsthe Collaborative Innovation Center of Suzhou Nano Science&Technology.
文摘Photothermal catalysis represents an emerging technology for solar energy conversion that combines the principles and advantages of photoand thermal catalytic mechanisms[1–5].Driven by the inter/intra-band transitions and subsequent electron-phonon scattering processes,photothermal catalysts can achieve rapid and highly localized heating,providing thermal activation to the chemical conversions.Besides,direct participation of photo-generated charge carriers could also drastically reduce the activation energy barriers and modulate the catalytic pathways.However,distinction between thermal and non-thermal contributions remains a key challenge for both fundamental understandings and large-scale applications of photothermal catalysis[6,7].This issue is largely due to a lack of precise in-situ surface-temperature measurement techniques that accurately quantify the light-to-heat conversion under reaction conditions at the nanoscale.Conventional macroscopic temperature measurement techniques,such as infrared cameras and thermocouples,suffer from the lack of spatiotemporal resolutions required for the localized photothermal conversion.They are,thus,measuring an average temperature of the ambient medium.Besides,they typically cannot be applied in in-situ temperature measurements,which is crucial since inaccurate heat dissipation rates may be predicted by ex-situ temperature measurement techniques.For instance,differences in gas pressure,composition and flow rate could lead to significantly different convective heat fluxes.
