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Updated: Sep 8, 2025

CO2 Photoreduction to CH4 Performance Under Concentrating Solar Light
Published on: June 12, 2019
A coupled system accelerating the photocatalytic reduction of in situ captured CO2 to methane
Shichao Zhang1,2, Xueyuan Wang2, Genheng Li2
1Engineering Research Center of Eco-environment in Three Gorges Reservoir Region of Ministry of Education, China Three Gorges University, Yichang 443002, China. huangdi@ctgu.edu.cn.
Abstract:
Herein, we develop a flow-coupled system using a bifunctional Pd/TiO2-TEPA/SiO2 composite that integrates CO2 capture and photocatalytic reduction. The amine-functionalized SiO2 pores selectively enrich diluted CO2 (10%) near Pd/TiO2 active sites, creating a CO2-rich microenvironment that promotes CO2 adsorption and lowers the energy barrier for *COOH intermediate formation. This system boosts the conversion of diluted CO2 into CH4 with a production rate of up to 5.5 μmol h-1, and the alkane selectivity reaches nearly 100%, representing a fivefold improvement over the standalone Pd/TiO2 system.
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