Improvement of carbon dioxide electroreduction by crystal surface modification of ZIF-8
Metal-organic frameworks (MOFs) possess high CO adsorption properties and are considered to be a promising candidate for the electrochemical carbon dioxide reduction reaction (eCORR). However, their insufficient selectivity and current density constrain their further exploration in the eCORR. In thi...
| Authors: | , , , , , , , , , |
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| Format: | article |
| Publication Date: | 2023 |
| Country: | España |
| Institution: | Universitat Autònoma de Barcelona |
| Repository: | Dipòsit Digital de Documents de la UAB |
| Language: | English |
| OAI Identifier: | oai:ddd.uab.cat:283463 |
| Online Access: | https://ddd.uab.cat/record/283463 https://dx.doi.org/urn:doi:10.1039/d3dt00185g |
| Access Level: | Open access |
| Keyword: | Adsorption properties Carbon dioxide reduction Crystal surfaces Electro reduction Electrochemicals Metalorganic frameworks (MOFs) Reduction reaction Surface-modification Surface-modified ]+ catalyst |
| Summary: | Metal-organic frameworks (MOFs) possess high CO adsorption properties and are considered to be a promising candidate for the electrochemical carbon dioxide reduction reaction (eCORR). However, their insufficient selectivity and current density constrain their further exploration in the eCORR. In this work, by introducing a very small proportion of 2,5-dihydroxyterephthalic acid (DOBDC) into ZIF-8, a surface modified ZIF-8-5% catalyst was synthesized by a post-modification method, exhibiting enhanced selectivity (from 56% to 79%) and current density (from -4 mA cm to -10 mA m) compared to ZIF-8. Density functional theory (DFT) calculations further demonstrate that the boosted eCORR performance on ZIF-8-5% could be attributed to the improved formation of the *COOH intermediate stemming from successful DOBDC surface modification. This work opens a new path for improving the catalytic properties of MOFs via their surface modification. |
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