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Re(tBu-bpy)(CO) 3 Cl Supported on Multi-Walled Carbon Nanotubes Selectively Reduces CO 2 in Water.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2019 Oct 30; Vol. 141 (43), pp. 17270-17277. Date of Electronic Publication: 2019 Oct 18. - Publication Year :
- 2019
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Abstract
- The selective electrochemical reduction of CO <subscript>2</subscript> to CO in water by a Re(tBu-bpy)(CO) <subscript>3</subscript> Cl catalyst incorporated into multi-walled carbon nanotubes (MWCNT) was investigated. Current densities of ∼4 mA/cm <superscript>2</superscript> and selectivities (FE <subscript>CO</subscript> ) of 99% were achieved at -0.56 V vs RHE in CO <subscript>2</subscript> -saturated aqueous KHCO <subscript>3</subscript> solutions. The Re(tBu-bpy)(CO) <subscript>3</subscript> Cl catalyst has been widely studied as a homogeneous catalyst in organic solvents. Supporting Re(tBu-bpy)(CO) <subscript>3</subscript> Cl on MWCNTs increases current densities, decreases overpotential, retains selectivity for reduction of CO <subscript>2</subscript> to CO, and allows operation in water at pH = 7.3 compared to the molecular catalyst in acetonitrile solution. The Re/MWCNT electrocatalysts achieve TON > 5600 and TOF > 1.6 s <superscript>-1</superscript> . This electrocatalyst material is efficient, robust, simple to prepare, and scalable.
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 141
- Issue :
- 43
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 31580669
- Full Text :
- https://doi.org/10.1021/jacs.9b08445