Bimetallic metal-organic frameworks for efficient visible-light-driven photocatalytic CO2 reduction and H2 generation
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Bimetallic metal-organic frameworks for efficient visible-light-driven photocatalytic CO2 reduction and H2 generation
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| Creator |
Ezugwu, Chizoba I
Ghosh, Srabanti Bera, Susmita Faraldos, Marisol Mosquera, Marta E G Rosal, Roberto |
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| Subject |
Engineering Materials
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| Description |
A series of robust octahedral bimetallic metal-organic frameworks, NH2-UiO-66(Zr/M), denoted as Zr/M-ATA, (where M is Fe, Co, or Cu) were prepared by solvothermal de novo reaction of 2-aminoterephthalic acid (denoted as H2ATA) and mixed metal salts using benzoic acid as a modulator. Photocatalytic studies revealed that Zr/Fe-ATA, Zr/Cu-ATA and Zr/Co-ATA containing double metals outperformed that of the monometallic Zr-ATA. Zr/Cu-ATA displayed excellent performance for visible-light-driven CO2 reduction with a formate forma-tion rate of 122 mu mol h-1 mmolMOF-1 , which is among the highest performance of NH2-UiO-66 based MOFs. Furthermore, Zr/Cu-ATA is an efficient catalyst that can generate 12.8 mmol of H2 in 2 h under visible light irradiation. The light absorption band of Zr/Cu-ATA shifted to the near-IR region and the presence of Cu-oxo clusters significantly narrowed the bandgap from 2.95 eV (Zr-ATA) to 1.93 eV (Zr/Cu-ATA). Other photo -electrochemical studies further confirmed that the high catalytic performance of Zr/Cu-ATA can be ascribed to optimized bandgap, facile charge transfer and availability of large number of active sites.
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| Publisher |
Elsevier
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| Date |
2023-03
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/5447/1/srabanti.pdf
Ezugwu, Chizoba I and Ghosh, Srabanti and Bera, Susmita and Faraldos, Marisol and Mosquera, Marta E G and Rosal, Roberto (2023) Bimetallic metal-organic frameworks for efficient visible-light-driven photocatalytic CO2 reduction and H2 generation. Separation and Purification Technology , 308. Art No-122868. ISSN 1383-5866 |
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| Relation |
http://cgcri.csircentral.net/5447/
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