1. Full-spectrum synergistic mechanism of photothermal catalytic CO2 hydrogenation.
- Author
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Li, Qiaoli, Zhu, Xuan, Li, Changqi, Hong, Jianan, Liu, Yan, Wang, Menglin, Xu, Chenyu, and Zhang, Yanwei
- Subjects
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TEMPERATURE distribution , *FOURIER transform infrared spectroscopy , *CATALYTIC hydrogenation , *CARBON dioxide , *CHEMICAL reactions - Abstract
Solar-driven CO 2 hydrogenation reactions are an attractive approach for the production of chemicals in the CO 2 utilization. We emphasize the importance of reliable temperature measurements for assessing catalyst performance and report the effect of uneven temperature distribution on the product selectivity of the CO 2 hydrogenation reaction of Ru/TiO 2 catalysts, as well as the CO 2 hydrogenation reaction of Ru/TiO 2 catalysts in dark and under UV, visible IR, and full-spectrum light conditions. Full-spectrum utilization exhibits higher activity at the same temperature. In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and density functional theory (DFT) calculations clarify the reaction pathway of CO 2 hydrogenation to methane, revealing that UV and visible infrared light promote the adsorption and activation processes at different stages along the chemical reaction pathway, respectively. These findings can facilitate additional innovative ideas for the mechanism study and future development of next-generation photothermal catalysts based on full-spectrum utilization. • Uncovering the misclassification of product selectivity due to heterogeneous temperature distribution on the catalyst. • Revealing the mechanism of action of different spectral light on the CO 2 hydrogenation reaction on Ru/TiO 2 catalysts. • This work provides a rigorous means of measuring catalyst temperature. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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