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Heterogeneous aqueous CO2 reduction by rhenium(I) tricarbonyl diimine complexes with a non-chelating pendant pyridyl group.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 6/7/2020, Vol. 49 Issue 21, p7078-7083, 6p
- Publication Year :
- 2020
-
Abstract
- Electrocatalytic CO<subscript>2</subscript> reduction in water using a series of chlorotricarbonylrhenium(I) diimine complexes deposited on pyrolytic graphite electrodes is described. Two known CO<subscript>2</subscript> reduction catalysts (with diimine = 4,4′-di-tert-butyl-2,2′-bipyridine or 2-(2′-quinolyl)benzimidazole), that are highly active in organic solvent, proved to be only weakly active in water. In contrast, Cl(CO)<subscript>3</subscript>Re(L) complexes with tridentate nitrogen-containing ligands (L = 4,4′,4′′-tri-tert-butyl-2,2′:6′,2′′-terpyridine or 2,6-bis(2-benzimidazolyl)pyridine) were better CO<subscript>2</subscript> reduction catalysts. In those Cl(CO)<subscript>3</subscript>Re(L) complexes, only two N-atoms of the ligand are coordinated to the rhenium, leaving the third arm of the ligands to support activated, CO<subscript>2</subscript>-bound intermediates. The 2,6-bis(2-pyridyl)pyridine (terpy) complex was the most active, with substantial activity at alkaline pH. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 49
- Issue :
- 21
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 143550869
- Full Text :
- https://doi.org/10.1039/d0dt01300e