Photocatalytic CO2 reduction with aminoanthraquinone organic dyes
publication
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Abstract[edit | edit source]
Summary[edit | edit source]
The photochemical reduction of CO2 to CO was shown using the iron complex Fe(DHPP)Cl in combination with the aminoanthraquinone photosensitizers 1-aminoanthraquinone, 1-amino-4-hydroxyanthraquinone, 1-Amino-2-bromo-4-hydroxyanthraquinone, Bromaminic acid, 1,2-Diaminoanthraquinone and 1,4-Diaminoanthraquinone. Turnover numbers (TONs) of up to 21616 and a selectivity of >99.9% for CO were reached in DMF after 48 h of irradiation. The experiments were conducted under visible-light irradiation (λ > 400 nm) with BIH (see section SEDs below) as sacrificial electron donor.
Advances and special progress[edit | edit source]
The authors present an efficient photocatalytic system with naturally abundant photosensitizers and without rare metals in which both the photosensitizer and catalyst show a high activity.
Additional remarks[edit | edit source]
For the most efficient system investigated in this study, a TON of 21616 per mole of catalyst and a TON of 6012 per mole of photosensitizer was obtained.
Content of the published article in detail[edit | edit source]
The article contains results of a study for the reduction of CO2 to CO using an iron complex and different aminoanthraquinone-based photosensitizers. The catalytic system performs best (referring to the TON of CO production) in DMF with photosensitizer 1-Amino-2-bromo-4-hydroxyanthraquinone.
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 | . | . | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 0.6 | 0.02 | 0.06 | >400 | 2395 | |||||||
| 2. | 0.6 | 0.02 | 0.06 | >400 | 2738 | |||||||
| 3. | 0.6 | 0.02 | 0.06 | >400 | 3551 | |||||||
| 4. | 0.6 | 0.02 | 0.06 | >400 | 8360 | |||||||
| 5. | 0.6 | 0.02 | 0.06 | >400 | 21616 | |||||||
| 6. | 0.6 | 0.02 | 0.06 | >400 | 907 |
| cat | cat conc [µM] | PS | PS conc [mM] | e-D | e-D conc [M] | solvent A | λexc [nm] | TON CO | . | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. | 0.5 | 0.0005 | 0.06 | > 400 | 3174 | |||||
| 2. | 1 | 0.001 | 0.06 | > 400 | 3587 | |||||
| 3. | 2 | 0.002 | 0.06 | > 400 | 3817 | |||||
| 4. | 5 | 0.005 | 0.06 | > 400 | 4978 | |||||
| 5. | 10 | 0.01 | 0.06 | > 400 | 4028 | |||||
| 6. | 0.5 | 0.02 | 0.06 | > 400 | 19158 | |||||
| 7. | 0.6 | 0.02 | 0.06 | > 400 | 21616 | |||||
| 8. | 1 | 0.02 | 0.06 | > 400 | 17020 | |||||
| 9. | 2 | 0.02 | 0.06 | > 400 | 11250 | |||||
| 10. | 10 | 0.02 | 0.06 | > 400 | 3942 | |||||
| 11. | 20 | 0.02 | 0.06 | > 400 | 2134 | |||||
| 12. | 50 | 0.02 | 0.06 | > 400 | 891 | |||||
| 13. | 2 | 0.015 | 0.06 | > 400 | 8772 | |||||
| 14. | 2 | 0.01 | 0.06 | > 400 | 5593 | |||||
| 15. | 5 | 0.01 | 0.06 | > 400 | 4128 | |||||
| 16. | 10 | 0.01 | 0.06 | > 400 | 4028 | |||||
| 17. | 20 | 0.01 | 0.06 | > 400 | 2325 | |||||
| 18. | 2 | 0.005 | 0.06 | > 400 | 8780 | |||||
| 19. | 5 | 0.005 | 0.06 | > 400 | 5258 | |||||
| 20. | 10 | 0.005 | 0.06 | > 400 | 2576 | |||||
| 21. | 20 | 0.005 | 0.06 | > 400 | 1539 |
Sacrificial electron donor[edit | edit source]
In this study, the experiments were done with the sacrificial electron donor BIH (100508).
Additives[edit | edit source]
In this study, the addition of Hg(0) was tested.
Tags: photochemical CO2 reduction, photocatalysis, iron catalyst, Fe(DHPP)Cl, aminoanthraquinone photosensitizer, anthraquinone derivatives, visible-light irradiation, BIH sacrificial donor, homogeneous catalysis, CO evolution, high turnover number, DMF solvent, rare-metal-free system, photoredox catalysis, green chemistry, carbon monoxide production, catalyst screening, concentration effects, mercury poisoning test, sustainable chemistry |
Investigations
- Photocatalytic reduction of CO2 with different photosensitizers (Molecular process, Photocatalytic CO2 conversion experiments)
- Photocatalytic CO2 reduction with varying concentrations of cat and PS (Molecular process, Photocatalytic CO2 conversion experiments)
