Visible-Light-Driven Photocatalytic CO2 Reduction by a Ni(II) Complex Bearing a Bioinspired Tetradentate Ligand for Selective CO Production: Difference between revisions
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{{ | {{DOI|doi=10.1021/jacs.7b01956}} | ||
=== Abstract === | === Abstract === | ||
==== Summary ==== | ==== Summary ==== | ||
A photochemical reduction of | A photochemical reduction of CO<sub>2</sub> to CO was shown using the nickel complex {{#moleculelink:|link=SOBXSEUOEROXNJ-UHFFFAOYSA-L|image=false|width=300|height=200}} as catalyst in combination with the ruthenium-based photosensitizer {{#moleculelink:|link=SJFYGUKHUNLZTK-UHFFFAOYSA-L|image=false|width=300|height=200}}. Turnover numbers (TONs) over 700 and a selectivity of >99% for CO were reached in dimethylacetamide/water. The experiments were conducted under visible-light irradiation (λ = 450 nm) using BIH as sacrificial reductants (see section SEDs below). | ||
==== Advances and special progress ==== | ==== Advances and special progress ==== | ||
A nickel catalyst inspired by the CODH enzyme (carbon monoxide dehydrogenase) was employed for the photocatalytic reduction of CO<sub>2</sub> with the back then highest reported TON values among nickel complexes in systems with [Ru(bpy)<sub>3</sub>]<sup>2+</sup>. | |||
==== Additional remarks ==== | ==== Additional remarks ==== | ||
The binding of CO<sub>2</sub> to the nickel(0) species was identified as the potential rate-determining step of the reduction. | |||
=== Content of the published article in detail === | === Content of the published article in detail === | ||
The article contains results for the reduction of | The article contains results for the reduction of CO<sub>2</sub> to CO under visible-light catalysis using a nickel complex as a catalyst. The catalytic system performs best (referring to the TON of CO production) in dimethylacetamide/water. | ||
==== Catalyst==== | ==== Catalyst==== | ||
| Line 123: | Line 125: | ||
==== Additives ==== | ==== Additives ==== | ||
In this study, | In this study, no additives were tested. | ||
[[Category:Photocatalytic CO2 conversion to CO]] | [[Category:Photocatalytic CO2 conversion to CO]][[Category:Publication]] | ||
Latest revision as of 10:37, 11 April 2024
Abstract[edit | edit source]
Summary[edit | edit source]
A photochemical reduction of CO2 to CO was shown using the nickel complex [Ni(bpet)(MeCN)2][ClO4]2 as catalyst in combination with the ruthenium-based photosensitizer Ru(bpy)3Cl2. Turnover numbers (TONs) over 700 and a selectivity of >99% for CO were reached in dimethylacetamide/water. The experiments were conducted under visible-light irradiation (λ = 450 nm) using BIH as sacrificial reductants (see section SEDs below).
Advances and special progress[edit | edit source]
A nickel catalyst inspired by the CODH enzyme (carbon monoxide dehydrogenase) was employed for the photocatalytic reduction of CO2 with the back then highest reported TON values among nickel complexes in systems with [Ru(bpy)3]2+.
Additional remarks[edit | edit source]
The binding of CO2 to the nickel(0) species was identified as the potential rate-determining step of the reduction.
Content of the published article in detail[edit | edit source]
The article contains results for the reduction of CO2 to CO under visible-light catalysis using a nickel complex as a catalyst. The catalytic system performs best (referring to the TON of CO production) in dimethylacetamide/water.
Catalyst[edit | edit source]
Photosensitizer[edit | edit source]
Investigation[edit | edit source]
| cat | cat conc [µM] | PS | PS conc [mM] | e-D | e-D conc [M] | solvent A | . | . | . | λexc [nm] | . | TON CO | . | TON H2 | . | . | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 0.03 | 0.5 | 0.1 | 450 | 713 | 6.9 | |||||||||||
| 2. | 0.03 | 0.5 | 0.1 | 450 | 159 | 11 | |||||||||||
| 3. | 0.03 | 0.5 | 0.1 | 450 | 67 | 3.4 | |||||||||||
| 4. | 0.03 | 0.5 | 0.1 | 450 | |||||||||||||
| 5. | 0.03 | 0.5 | 0.1 | 450 | |||||||||||||
| 6. | 0.03 | 0.5 | 0.1 | 450 | 2.6 | 25.5 |
Sacrificial electron donor[edit | edit source]
In this study, the experiments were done with the sacrificial electron donors TEOA (100507), BIH (100508), and TEA (100505).
Additives[edit | edit source]
In this study, no additives were tested.
Investigations
- Table 1 (Molecular process, Photocatalytic CO2 conversion experiments)
