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Liquid phase hydrogenation of CO2 to formate using palladium and ruthenium nanoparticles supported on molybdenum carbide

Mitchell, Claire, Terranova, Umberto, AlShibane, Ihfaf, Morgan, David John, Davies, Thomas, He, Qian, Hargreaves, Justin, Sankar, Meenakshisundaram and De Leeuw, Nora Henriette 2019. Liquid phase hydrogenation of CO2 to formate using palladium and ruthenium nanoparticles supported on molybdenum carbide. New Journal of Chemistry 43 , pp. 13985-13997. 10.1039/C9NJ02114K

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Abstract

We report the development of palladium nanoparticles supported on Mo2C as an active catalyst for the liquid-phase hydrogenation of CO2 to formate under mild reaction conditions (100 °C and 2.0 MPa of a 1:1 CO2:H2 mixture). A series of Pd/Mo2C catalysts were synthesised via the modified wet-impregnation (MIm) and sol-immobilization (SIm) techniques and evaluated for CO2 hydrogenation, in an aqueous 1M NaOH solution. MIm catalysts synthesised using PdCl2 dissolved in a 2M HCl solution gave the highest formate yield with turnover numbers of up to 109 after 19 h. We further report the crucial role of base and the pH of the reaction medium for the hydrogenation of CO2 to formate. Based on stability studies, electron microscopic characterisation and density functional theory calculations we found that Ru has a stronger affinity than Pd to Mo2C resulting in the development of a stable bimetallic RuPd/Mo2C catalyst for the hydrogenation of CO2 to formate salt.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Publisher: Royal Society of Chemistry
ISSN: 1144-0546
Funders: EPSRC
Date of First Compliant Deposit: 8 August 2019
Date of Acceptance: 1 August 2019
Last Modified: 30 Nov 2019 06:32
URI: http://orca-mwe.cf.ac.uk/id/eprint/124807

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