New palladium phosphine catalysts for aqueous electrochemical carbon dioxide reduction
- National Renewable Energy Laboratory, Golden, CO (United States)
The complexes [RP(CH{sub 2}CH{sub 2}Pr`{sub 2}){sub 2}Pd(CH{sub 3}Cn)(BF{sub 4}){sub 2}] (R,R`=alkyl or aryl) have been previously shown to catalyze the electrochemical reduction of CO{sub 2} to CO in organic solvents. Recent efforts to extend this catalysis to aqueous systems, but attachment of polar groups to the triphospine framework, will be described. The syntheses of the new functionalized ligands and their corresponding palladium complexes will be described. Many of the new complexes synthesized show no catalysis of carbon dioxide reduction, however the complex where R = Ph and R` = CH{sub 2}CH{sub 2}OEt does react with carbon dioxide, although it is not water soluble. These results will be contrasted with the more interesting behavior of the complex(1) where R = CH{sub 2}CH{sub 2}CH{sub 2}OH and R` = ethyl. Complex(1) does catalyze the electrochemical reduction of carbon dioxide in a variety of solvents and is water soluble even when the acetonitrile ligand is replaced with triethylphosphine.
- OSTI ID:
- 141022
- Report Number(s):
- CONF-930304--
- Country of Publication:
- United States
- Language:
- English
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