Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite
Green electricity‐driven electrocatalytic CO2 reduction (e‐CO2RR) has emerged as a promising approach to upcycle CO2 into valuable chemicals and fuels, paving the way for a carbon‐neutral economy. The success of such a device relies on the development of cost‐effective catalysts that can efficiently...
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Wiley-VCH
2025-07-01
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| Series: | Advanced Energy & Sustainability Research |
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| Online Access: | https://doi.org/10.1002/aesr.202500080 |
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| author | Eunice Estrella De Guzman Tzu‐Hsuan Wang Michael Angelo B. Promentilla Chia‐Yu Lin |
| author_facet | Eunice Estrella De Guzman Tzu‐Hsuan Wang Michael Angelo B. Promentilla Chia‐Yu Lin |
| author_sort | Eunice Estrella De Guzman |
| collection | DOAJ |
| description | Green electricity‐driven electrocatalytic CO2 reduction (e‐CO2RR) has emerged as a promising approach to upcycle CO2 into valuable chemicals and fuels, paving the way for a carbon‐neutral economy. The success of such a device relies on the development of cost‐effective catalysts that can efficiently and selectively catalyze e‐CO2RR. In the present contribution, the high activity and selectivity of graphene‐supported CoPc (graphene‐CoPc) are demonstrated toward CO generation from e‐CO2RR by encapsulating graphene|CoPc into Perlite–Metakaolin‐based geopolymer (geopolymer|graphene‐CoPc). The high electric conductivity (3.52 ± 0.4 S m−1) and CO2 adsorption capability (0.16 mmol CO2 g−1) of the geopolymer matrix, obtained through the systematic investigation and optimization of synthetic conditions, facilitate the charge transfer and provide high local CO2 concentration. Consequently, this significantly enhancing both turnover frequency (2.3 ± 0.3 s−1) and Faradaic efficiency (93.7 ± 3.1%) of geopolymer|graphene‐CoPc for CO production from the low‐concentration CO2 (≈40%) in simulated biogas atmosphere at a low η of 0.69 V as compared to the pristine graphene‐CoPc (turnover frequency: 1.37 ± 0.1 s−1 and Faradic efficiency: 46.3 ± 2.0%). |
| format | Article |
| id | doaj-art-031d72946bd7451e88902b8fe1a0aaba |
| institution | Kabale University |
| issn | 2699-9412 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Energy & Sustainability Research |
| spelling | doaj-art-031d72946bd7451e88902b8fe1a0aaba2025-08-20T03:50:06ZengWiley-VCHAdvanced Energy & Sustainability Research2699-94122025-07-0167n/an/a10.1002/aesr.202500080Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine CompositeEunice Estrella De Guzman0Tzu‐Hsuan Wang1Michael Angelo B. Promentilla2Chia‐Yu Lin3Department of Chemical Engineering National Cheng Kung University Tainan City 70101 TaiwanDepartment of Chemical Engineering National Cheng Kung University Tainan City 70101 TaiwanDepartment of Chemical Engineering De La Salle University 2401 Taft Avenue Manila 022 PhilippinesDepartment of Chemical Engineering National Cheng Kung University Tainan City 70101 TaiwanGreen electricity‐driven electrocatalytic CO2 reduction (e‐CO2RR) has emerged as a promising approach to upcycle CO2 into valuable chemicals and fuels, paving the way for a carbon‐neutral economy. The success of such a device relies on the development of cost‐effective catalysts that can efficiently and selectively catalyze e‐CO2RR. In the present contribution, the high activity and selectivity of graphene‐supported CoPc (graphene‐CoPc) are demonstrated toward CO generation from e‐CO2RR by encapsulating graphene|CoPc into Perlite–Metakaolin‐based geopolymer (geopolymer|graphene‐CoPc). The high electric conductivity (3.52 ± 0.4 S m−1) and CO2 adsorption capability (0.16 mmol CO2 g−1) of the geopolymer matrix, obtained through the systematic investigation and optimization of synthetic conditions, facilitate the charge transfer and provide high local CO2 concentration. Consequently, this significantly enhancing both turnover frequency (2.3 ± 0.3 s−1) and Faradaic efficiency (93.7 ± 3.1%) of geopolymer|graphene‐CoPc for CO production from the low‐concentration CO2 (≈40%) in simulated biogas atmosphere at a low η of 0.69 V as compared to the pristine graphene‐CoPc (turnover frequency: 1.37 ± 0.1 s−1 and Faradic efficiency: 46.3 ± 2.0%).https://doi.org/10.1002/aesr.202500080biogas upgradingCO2 affinitiesdiluted CO2electrochemical upcycling of CO2graphene‐supported cobalt phthalocyanine |
| spellingShingle | Eunice Estrella De Guzman Tzu‐Hsuan Wang Michael Angelo B. Promentilla Chia‐Yu Lin Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite Advanced Energy & Sustainability Research biogas upgrading CO2 affinities diluted CO2 electrochemical upcycling of CO2 graphene‐supported cobalt phthalocyanine |
| title | Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite |
| title_full | Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite |
| title_fullStr | Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite |
| title_full_unstemmed | Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite |
| title_short | Integrated Capture and Electroreduction of Low‐Concentration CO2 to CO Using Geopolymer|Graphene‐Cobalt Phthalocyanine Composite |
| title_sort | integrated capture and electroreduction of low concentration co2 to co using geopolymer graphene cobalt phthalocyanine composite |
| topic | biogas upgrading CO2 affinities diluted CO2 electrochemical upcycling of CO2 graphene‐supported cobalt phthalocyanine |
| url | https://doi.org/10.1002/aesr.202500080 |
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