Photochemical catalytic processes can reduce the activation energy so that reactions can occur under milder conditions.However,it is still unknown whether photochemical effects are present in photothermal catalysis ov...Photochemical catalytic processes can reduce the activation energy so that reactions can occur under milder conditions.However,it is still unknown whether photochemical effects are present in photothermal catalysis over conventional transition metal materials.Herein,the representative photothermal CO_(2)hydrogenation catalyst,Ni@p-SiO_(2),is employed as a model system to quantitatively probe the contribution of photochemical effect.Through a series of catalytic and photophysical characterizations,it is found that negligible photochemical effect in the ultraviolet-visible region can be observed for the traditional Ni-based catalyst.The results of photo-electrochemistry(PEC)test further confirm that no apparent photochemical effect is present for the Ni@p-SiO_(2)catalyst in the aqueous-phase environment.It has been further evidenced that the photochemical contributions can be significantly amplified by introducing plasmonic metals,such as Au,into the system.This work provides a guideline for the design and construction of efficient synergetic photothermal-photochemical catalytic systems.展开更多
基金supported by the National Natural Science Foundation of China(52172221,52272229,51920105005)the China Postdoctoral Science Foundation(2022M712304)+4 种基金Jiangsu Funding Program for Excellent Postdoctoral Talent(2022ZB534,2022ZB564)the China Postdoctoral Science Foundation(2021M702388)the Natural Science Foundation of Jiangsu Province(BK20200101)Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices(ZZ2201,ZZ2103)Suzhou Key Laboratory of Functional Nano&Soft Materials,Collaborative Innovation Center of Suzhou Nano Science&Technology.
文摘Photochemical catalytic processes can reduce the activation energy so that reactions can occur under milder conditions.However,it is still unknown whether photochemical effects are present in photothermal catalysis over conventional transition metal materials.Herein,the representative photothermal CO_(2)hydrogenation catalyst,Ni@p-SiO_(2),is employed as a model system to quantitatively probe the contribution of photochemical effect.Through a series of catalytic and photophysical characterizations,it is found that negligible photochemical effect in the ultraviolet-visible region can be observed for the traditional Ni-based catalyst.The results of photo-electrochemistry(PEC)test further confirm that no apparent photochemical effect is present for the Ni@p-SiO_(2)catalyst in the aqueous-phase environment.It has been further evidenced that the photochemical contributions can be significantly amplified by introducing plasmonic metals,such as Au,into the system.This work provides a guideline for the design and construction of efficient synergetic photothermal-photochemical catalytic systems.
