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Metal organic frameworks as electrocatalysts for CO2 reduction
Dissertation (MSc (Chemistry))--University of Pretoria, 2024.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2025
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| _version_ | 1867613529834520576 |
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| access_status_str | Open Access |
| author2 | Nombona, Nolwazi |
| author_browse | Nombona, Nolwazi |
| author_facet | Nombona, Nolwazi |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc (Chemistry))--University of Pretoria, 2024. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/100394 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:36.202Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/100394 Metal organic frameworks as electrocatalysts for CO2 reduction Nombona, Nolwazi saraswati.sharma23@gmail.com Sharma, Saraswati UCTD Sustainable development goals (SDGs) Metal organic framework (MOF) Electrocatalysis Carbon dioxide Natural and agricultural sciences theses SDG-13 SDG-13: Climate action Dissertation (MSc (Chemistry))--University of Pretoria, 2024. Metal-Organic Frameworks (MOFs) have received significant attention as porous and crystalline materials with potential in gas storage, catalysis, and separation due to their high surface area, tuneable porosity, and various structural characteristics. MOFs have recently emerged as potential candidates for the electrochemical reduction of CO2, an essential process in mitigating the negative consequences of increasing atmospheric CO2 levels, which contribute to global warming, desertification, and ocean acidification. Electrochemical CO2 reduction offers an environmentally friendly approach to converting CO2 into valuable compounds such as methanol, hydrocarbons, and formic acid. In this study three MOF electrocatalysts were synthesised using a solvothermal method, these were MOF-5, Cu-BTC MOF, and Ir(III)CpCl@COMOC-4 MOF. The synthesized MOFs were characterized using various techniques; including Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and Brunauer-Emmett-Teller (BET) analysis. The XRD results revealed diffractogram patterns consistent with previously reported results for the MOFs. SEM analysis showed distinct morphologies for the MOFs. MOF-5 had a cubic morphology, Cu-BTC MOF had an octahedral morphology and Ir(III)CpCl@COMOC-4 MOF displayed irregular structure characterized by visible pores on the surface. The Cu-BTC MOF had the highest specific surface area of 634 m2/g followed by MOF-5 at 630 m2/g and lastly Ir(III)CpCl@COMOC-4 MOF at 273 m2/g. Electrochemical catalysis using cyclic voltammetry, revealed CO2 reduction capabilities across all three MOFs. The CO2 reduction process was indicated by a shift in the MOF redox peaks in the presence of CO2 with increase currents. Differential electrochemical mass spectrometry (DEMS) is required to validate the product(s) formed. The findings indicate that the MOFs show promise as electrocatalysts for CO2 reduction underscoring their potential as candidates for environmentally friendly CO2 conversion technology. Chemistry MSc (Chemsitry) Unrestricted Faculty of Natural and Agricultural Sciences SDG-13: Climate action 2025-01-30T08:51:08Z 2025-01-30T08:51:08Z 2025-04 2024-11 Dissertation * A2025 http://hdl.handle.net/2263/100394 DOI: https://doi.org/10.25403/UPresearchdata.28302197.v1 https://doi.org/10.25403/UPresearchdata.28302197 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | UCTD Sustainable development goals (SDGs) Metal organic framework (MOF) Electrocatalysis Carbon dioxide Natural and agricultural sciences theses SDG-13 SDG-13: Climate action Metal organic frameworks as electrocatalysts for CO2 reduction |
| title | Metal organic frameworks as electrocatalysts for CO2 reduction |
| title_full | Metal organic frameworks as electrocatalysts for CO2 reduction |
| title_fullStr | Metal organic frameworks as electrocatalysts for CO2 reduction |
| title_full_unstemmed | Metal organic frameworks as electrocatalysts for CO2 reduction |
| title_short | Metal organic frameworks as electrocatalysts for CO2 reduction |
| title_sort | metal organic frameworks as electrocatalysts for co2 reduction |
| topic | UCTD Sustainable development goals (SDGs) Metal organic framework (MOF) Electrocatalysis Carbon dioxide Natural and agricultural sciences theses SDG-13 SDG-13: Climate action |
| url | http://hdl.handle.net/2263/100394 https://doi.org/10.25403/UPresearchdata.28302197 |