4.6 Article

Hydrogenation of CO2 into Formates by Ligand-Capped Palladium Heterogeneous Catalysts

Journal

CHEMCATCHEM
Volume 15, Issue 6, Pages -

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.202201408

Keywords

CO2 hydrogenation; ligand stabilizer; nanoparticles; palladium; supported catalyst

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A simple procedure was used to synthesize two series of ligand-capped supported Pd nanoparticles catalysts, which were tested in formate synthesis. Among these series, PPh3 showed the most appropriate stabilizing ligand, while TiO2 was the most efficient support for these catalysts. The hydrogenation of CO2 was conducted under mild reaction conditions (1.8 MPa CO2, 1.8 MPa H-2, 60 degrees C) using water as a solvent and a base, resulting in excellent selectivity towards formates with a TON of 1032 (TOF of 69 h(-1), [HCOOK]=1.1 mol/l).
The synthesis of two series of catalysts based on ligand-capped supported Pd nanoparticles was carried out using a simple procedure and the resulting materials were tested in the formate synthesis. Within these series, PPh3 revealed the most appropriate stabilizing ligand while TiO2 was the most efficient support for these catalysts. The hydrogenation of CO2 was carried out under mild reaction conditions (1.8 MPa CO2, 1.8 MPa H-2, 60 degrees C) using water as solvent and in the presence of a base, providing excellent selectivity towards formates with a TON of 1032 (TOF of 69 h(-1), [HCOOK]=1.1 mol/l).

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