| Autor: |
Shengjie Bai, Haoran Qiu, Mengmeng Song, Guiwei He, Feng Wang, Ya Liu, Liejin Guo |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
eScience, Vol 2, Iss 4, Pp 428-437 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2667-1417 |
| DOI: |
10.1016/j.esci.2022.06.006 |
| Popis: |
Solar-driven CO2 conversion to chemical fuels in an aqueous solution is restricted not only by photocatalysts but also by mass transfer. Here, a regulatable three-phase interface on a porous fixed-bed is constructed for efficient C–C coupling in photocatalytic CO2 reduction. The photocatalytic results show that ∼90% selectivity towards C2+ products is obtained by a Cu/Cd0.5Zn0.5S photocatalyst, with a yield of 6.54 μmol/h (an irradiation area of 0.785 cm2), while only 0.94 μmol/h (an irradiation area of 19.625 cm2) is achieved with a commonly used suspension photocatalytic reactor. We find that under the same CO2 feed rate, the local CO2 concentration in this porous fixed-bed photoreactor is obviously higher than in the suspension photoreactor. The larger local CO2 coverage derived from a higher CO2 supply and aggregation enhances the C–C coupling, thereby generating more C2+. Even an observable three-phase interface on the porous fixed-bed can be regulated by adjusting the CO2 supply, for which the optimal gas inlet rate is 5–10 sccm. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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