Selective CO2 Reduction Catalyzed by Single Cobalt Sites on Carbon Nitride under Visible-Light Irradiation
| Autor: | Anatoly I. Frenkel, Alexander D. Carl, Ronald L. Grimm, Jiahao Huang, Gonghu Li, Christine A. Caputo, Thomas G. Fenton, Sebastian A. Pantovich, Peipei Huang |
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| Rok vydání: | 2018 |
| Předmět: |
Absorption spectroscopy
chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Turnover number chemistry.chemical_compound Colloid and Surface Chemistry chemistry Photocatalysis 0210 nano-technology Selectivity Cobalt Carbon nitride Visible spectrum |
| Zdroj: | Journal of the American Chemical Society. 140:16042-16047 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Framework nitrogen atoms of carbon nitride (C3N4) can coordinate with and activate metal sites for catalysis. In this study, C3N4 was employed to harvest visible light and activate Co2+ sites, without the use of additional ligands, in photochemical CO2 reduction. Photocatalysts containing single Co2+ sites on C3N4 were prepared by a simple deposition method and demonstrated excellent activity and product selectivity toward CO formation. A turnover number of more than 200 was obtained for CO production using the synthesized photocatalyst under visible-light irradiation. Inactive cobalt oxides formed at relatively high cobalt loadings but did not alter product selectivity. Further studies with X-ray absorption spectroscopy confirmed the presence of single Co2+ sites on C3N4 and their important role in achieving selective CO2 reduction. |
| Databáze: | OpenAIRE |
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