Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst
Electrochemical reduction of CO2 (ECR) on transition metal‐containing porphyrin systems often leads to carbon monoxide. Herein, a modified zero‐gap polymer electrolyte membrane water electrolyzer is used with 5,10,15,20–tetraphenyl–21H,23H–porphine copper (II) as a cathodic electrocatalyst for ECR i...
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| Language: | English |
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Wiley-VCH
2025-08-01
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| Series: | ChemistryOpen |
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| Online Access: | https://doi.org/10.1002/open.202400488 |
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| author | Simphiwe L. Ndlangamandla Shankara G. Radhakrishnan |
| author_facet | Simphiwe L. Ndlangamandla Shankara G. Radhakrishnan |
| author_sort | Simphiwe L. Ndlangamandla |
| collection | DOAJ |
| description | Electrochemical reduction of CO2 (ECR) on transition metal‐containing porphyrin systems often leads to carbon monoxide. Herein, a modified zero‐gap polymer electrolyte membrane water electrolyzer is used with 5,10,15,20–tetraphenyl–21H,23H–porphine copper (II) as a cathodic electrocatalyst for ECR in 0.1 M NaOH as an aqueous catholyte. The setup yields CO, CH4, and C2H4 along with hydrogen evolution, with selectivity toward C2H4 formation as indicated by gas chromatographic analysis. Although hydrogen formation is predominant, the system yields a high average current density of 146.94 mA cm−2 and a Tafel slope of ≈226 mV dec−1 in concurrence. The cyclic voltammetric experiments show the stepwise formation of Cu (II) → Cu (I) → Cu (0) based on the potentials referenced against the reversible hydrogen electrode, which could have been the driving factor for the ECR. |
| format | Article |
| id | doaj-art-17a20d136cd040ef9a0ff403a3a50ebf |
| institution | Kabale University |
| issn | 2191-1363 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | ChemistryOpen |
| spelling | doaj-art-17a20d136cd040ef9a0ff403a3a50ebf2025-08-21T12:05:32ZengWiley-VCHChemistryOpen2191-13632025-08-01148n/an/a10.1002/open.202400488Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular ElectrocatalystSimphiwe L. Ndlangamandla0Shankara G. Radhakrishnan1Department of Chemistry University of Pretoria Pretoria 0002 South AfricaDepartment of Chemistry University of Pretoria Pretoria 0002 South AfricaElectrochemical reduction of CO2 (ECR) on transition metal‐containing porphyrin systems often leads to carbon monoxide. Herein, a modified zero‐gap polymer electrolyte membrane water electrolyzer is used with 5,10,15,20–tetraphenyl–21H,23H–porphine copper (II) as a cathodic electrocatalyst for ECR in 0.1 M NaOH as an aqueous catholyte. The setup yields CO, CH4, and C2H4 along with hydrogen evolution, with selectivity toward C2H4 formation as indicated by gas chromatographic analysis. Although hydrogen formation is predominant, the system yields a high average current density of 146.94 mA cm−2 and a Tafel slope of ≈226 mV dec−1 in concurrence. The cyclic voltammetric experiments show the stepwise formation of Cu (II) → Cu (I) → Cu (0) based on the potentials referenced against the reversible hydrogen electrode, which could have been the driving factor for the ECR.https://doi.org/10.1002/open.202400488copperelectrochemical CO2 reductionethylenepolymer electrolyte membrane electrolysisporphyrinszero‐gap electrolyzers |
| spellingShingle | Simphiwe L. Ndlangamandla Shankara G. Radhakrishnan Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst ChemistryOpen copper electrochemical CO2 reduction ethylene polymer electrolyte membrane electrolysis porphyrins zero‐gap electrolyzers |
| title | Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst |
| title_full | Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst |
| title_fullStr | Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst |
| title_full_unstemmed | Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst |
| title_short | Electrochemical Reduction of CO2 in a Zero‐Gap Electrolyzer Cell on a Metal Molecular Electrocatalyst |
| title_sort | electrochemical reduction of co2 in a zero gap electrolyzer cell on a metal molecular electrocatalyst |
| topic | copper electrochemical CO2 reduction ethylene polymer electrolyte membrane electrolysis porphyrins zero‐gap electrolyzers |
| url | https://doi.org/10.1002/open.202400488 |
| work_keys_str_mv | AT simphiwelndlangamandla electrochemicalreductionofco2inazerogapelectrolyzercellonametalmolecularelectrocatalyst AT shankaragradhakrishnan electrochemicalreductionofco2inazerogapelectrolyzercellonametalmolecularelectrocatalyst |