选择性
光热治疗
催化作用
纳米颗粒
光催化
材料科学
甲烷
产量(工程)
光化学
化学工程
纳米技术
化学
有机化学
工程类
冶金
作者
Tianjiao Dong,Xiaoyu Liu,Zhenfei Tang,Haifeng Yuan,Di Jiang,Yijie Wang,Zhen Liu,Xiao Li Zhang,Shifeng Huang,Hong Liu,Lili Zhao,Weijia Zhou
标识
DOI:10.1016/j.apcatb.2022.122176
摘要
The global warming makes us focus on the resource utilization of CO2. Herein, defective TiOx nanoparticles with rich oxygen vacancies are synthesized through laser bombardment, and uniform Ru nanoparticles are loaded on the TiOx (Ru-TiOx) by the assistance of photothermal reduction. Assisted by the high photothermal conversion efficiency of defective TiOx (259.3 °C), the photothermal co-catalytic methane yield of Ru-TiOx reaches 15.84 mmol/g/h with high selectivity (99.99%). After comparing the methane yields in different wavelengths, the synergistic effect between photocatalysis and thermocatalysis of Ru-TiOx is confirmed. The theoretical calculation demonstrates that the deoxidation active sites of TiOx and hydrogenation active sites of Ru are responsible for high activity and selectivity. Furthermore, the excellent photothermal co-catalytic activity (about 1 mmol/g/h for cloudless days) and stability under outdoor sunlight are demonstrated. This work confirms that the Ru-TiOx system synthesized via laser bombardment has practical application value in photothermal co-catalysis of CO2 hydrogenation.
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