An integrated Re(I) photocatalyst and sensitizer that activates the formation of formic acid from reduction of CO2
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Abstract
Summary
A photochemical reduction of CO2 to formic acid was shown using the rhenium catalyst and sensitizer [Re(bpy)2(CO)2][OTf] in combination with the supplemental photosensitizer [Ru(bpy)3][PF6]. Turnover numbers (TONs) up to 428 for formic acid were reached in dimethylacetamide. The experiments were conducted under visible-light irradiation (λ = 405 nm) with TEOA (see section SEDs below) as sacrificial electron donor.
Advances and special progress
A unprecedented rhenium complex was used as an integrated photosensitizer/catalyst to generate formic acid from CO2; other rhenium catalysts only allow for the formation of CO as the reduction product.
Additional remarks
Content of the published article in detail
Catalyst
Photosensitizer
Investigation
Investigation-Name: Table 1
Sacrificial electron donor
In this study, the experiments were done with the sacrificial electron donor TEOA (100507).
Additives
Investigations
- Effect of proton donor (Molecular process, Photocatalytic CO2 conversion experiments)
- Solvent effect study between DMA DMF and acetonitrile (Molecular process, Photocatalytic CO2 conversion experiments)
- Study on the concentration of catalyst (Molecular process, Photocatalytic CO2 conversion experiments)
- Time profile in DMF (Molecular process, Photocatalytic CO2 conversion experiments)
