Toward Visible-Light Photochemical CO2‑to-CH4 Conversion in Aqueous Solutions Using Sensitized Molecular Catalysis: Difference between revisions
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==== Summary==== | ==== Summary==== | ||
A photochemical reduction of CO<sub>2</sub> was achieved using an iron porphyrin catalyst and an iridium complex as the photosensitizer. Carbon monoxide, produced with a TON of 178 under optimized conditions, was the main product, methane was produced in a substantial amount with the TON of 32, while hydrogen was formed as a minor byproduct. The experiments were performed under irradiation with ''λ >'' 420 nm in acetonitrile and in the presence of various amines as sacrificial electron donors. | |||
==== Advances and special progress==== | ==== Advances and special progress==== | ||
The catalytic reduction of CO<sub>2</sub> could also be realized under aqueous conditions (acetonitrile/water 3:7 v:v), yielding carbon monoxide as the main product while methane was produced with selectivity up to 10% (3 TON). | |||
==== Additional remarks==== | ==== Additional remarks==== | ||
Among the various amines employed as sacrificial electron donors, TEA appeared as the best choice to maximize CO<sub>2</sub> product formation. | |||
=== Content of the published article in detail === | === Content of the published article in detail === | ||
The article contains results for the reduction of CO<sub>2</sub> to CO as the main product under visible-light irradiation using iron porphyrin complex Fe(pTMAPP)Cl<sub>5</sub> ({{#moleculelink:|link=LKNRTBVZMCBYCY-NGWNFTKISA-I|image=false|width=300|height=200}}) as the catalysts, an iridium complex as the photosensitizer and various amines as the sacrificial electron donor. The catalytic system performs best (referring to the TON of CO production) with Ir(ppy)<sub>3</sub> ({{#moleculelink:|link=QKBWDYLFYVXTGE-UHFFFAOYSA-N|image=false|width=300|height=200}}) as the photosensitizer and TEA as the sacrificial electron donor. | |||
==== Catalyst==== | ==== Catalyst==== | ||
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====Sacrificial electron donor==== | ====Sacrificial electron donor==== | ||
{{#moleculelink:|link= | In this study, the experiments were conducted with TEA ({{#moleculelink:|link=ZMANZCXQSJIPKH-UHFFFAOYSA-N|image=false|width=300|height=200}}), TEOA ({{#moleculelink:|link=GSEJCLTVZPLZKY-UHFFFAOYSA-N|image=false|width=300|height=200}}), and DIPEA ({{#moleculelink:|link=JGFZNNIVVJXRND-UHFFFAOYSA-N|image=false|width=300|height=200}}) as sacrificial electron donors. | ||
====Additives==== | ====Additives==== | ||
{{#moleculelink:|link=RHQDFWAXVIIEBN-UHFFFAOYSA-N|image= | In some experiments described in this study, TFE ({{#moleculelink:|link=RHQDFWAXVIIEBN-UHFFFAOYSA-N|image=false|width=300|height=200}}) was used as an additive. | ||
[[Category:Photocatalytic CO2 conversion to CH4]] | [[Category:Photocatalytic CO2 conversion to CH4]] | ||
Revision as of 13:35, 10 January 2024
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Abstract
Summary
A photochemical reduction of CO2 was achieved using an iron porphyrin catalyst and an iridium complex as the photosensitizer. Carbon monoxide, produced with a TON of 178 under optimized conditions, was the main product, methane was produced in a substantial amount with the TON of 32, while hydrogen was formed as a minor byproduct. The experiments were performed under irradiation with λ > 420 nm in acetonitrile and in the presence of various amines as sacrificial electron donors.
Advances and special progress
The catalytic reduction of CO2 could also be realized under aqueous conditions (acetonitrile/water 3:7 v:v), yielding carbon monoxide as the main product while methane was produced with selectivity up to 10% (3 TON).
Additional remarks
Among the various amines employed as sacrificial electron donors, TEA appeared as the best choice to maximize CO2 product formation.
Content of the published article in detail
The article contains results for the reduction of CO2 to CO as the main product under visible-light irradiation using iron porphyrin complex Fe(pTMAPP)Cl5 (Fe(pTMAPP)Cl5) as the catalysts, an iridium complex as the photosensitizer and various amines as the sacrificial electron donor. The catalytic system performs best (referring to the TON of CO production) with Ir(ppy)3 (100934) as the photosensitizer and TEA as the sacrificial electron donor.
Catalyst
Photosensitizer
Investigation
Sacrificial electron donor
In this study, the experiments were conducted with TEA (TEA), TEOA (TEOA), and DIPEA (DIPEA) as sacrificial electron donors.
Additives
In some experiments described in this study, TFE (TFE) was used as an additive.
Investigations
- Cyclic voltammetry in various conditions (Assay, Cyclic Voltammetry experiments)
- Photocatalytic reduction of CO2: conditions optimization (Molecular process, Photocatalytic CO2 conversion experiments)
