Among the common conversion routes of CO2, catalytic hydrogenation is one of the most effective methods. Although most of the reaction pathways have basically no by-products, only the hydrogenation of CO2 to form formic acid has an atomic utilization rate of 100%. At the same time, formic acid is a good hydrogen (H2) storage material with good application prospects. A novel covalent triazine framework CTF-L formed by the polymerization of letrozole was successfully synthesized through ionothermal method. Molecular Ruthenium (Ru) catalysts supported on CTF-L were implemented for heterogeneous catalytic CO2 hydrogenation to formate. By changing the preparation conditions of CTF-L, the carbon dioxide adsorption capacity of the material and its electron-donating effect on ruthenium element can be adjusted. The balance between the two can be harmonized to achieve the best activity of the catalyst. The best catalyst efficiently converted CO2 into formate through hydrogenation with a turnover number of 22000 after 1 h, being the highest reported to date for a heterogeneous catalyst, which makes it attractive toward industrial application. Furthermore, the synthesized catalyst was found to be stable in air and was recycled by simple filtration without significant loss of catalytic activity.

Coordination of CO2 adsorption capacity and metal electron cloud density to facilitate hydrogenation of CO2 to formate

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ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.