Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction
Abstract Carbon dioxide (CO2) electroreduction reaction (CO2RR) offers a promising strategy for the conversion of CO2 into valuable chemicals and fuels. CO2RR in acidic electrolytes would have various advantages due to the suppression of carbonate formation. However, its reaction rate is severely li...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2024-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-44722-4 |
| _version_ | 1797349846186721280 |
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| author | Mingxu Sun Jiamin Cheng Miho Yamauchi |
| author_facet | Mingxu Sun Jiamin Cheng Miho Yamauchi |
| author_sort | Mingxu Sun |
| collection | DOAJ |
| description | Abstract Carbon dioxide (CO2) electroreduction reaction (CO2RR) offers a promising strategy for the conversion of CO2 into valuable chemicals and fuels. CO2RR in acidic electrolytes would have various advantages due to the suppression of carbonate formation. However, its reaction rate is severely limited by the slow CO2 diffusion due to the absence of hydroxide that facilitates the CO2 diffusion in an acidic environment. Here, we design an optimal architecture of a gas diffusion electrode (GDE) employing a copper-based ultrathin superhydrophobic macroporous layer, in which the CO2 diffusion is highly enhanced. This GDE retains its applicability even under mechanical deformation conditions. The CO2RR in acidic electrolytes exhibits a Faradaic efficiency of 87% with a partial current density $$( {j}_{{{{\rm{C}}}}_{2+}})$$ ( j C 2 + ) of −1.6 A cm−2 for multicarbon products (C2+), and $$ {j}_{{{{{{\rm{C}}}}}}_{2+}}$$ j C 2 + of −0.34 A cm−2 when applying dilute 25% CO2. In a highly acidic environment, C2+ formation occurs via a second order reaction which is controlled by both the catalyst and its hydroxide. |
| first_indexed | 2024-03-08T12:36:21Z |
| format | Article |
| id | doaj.art-4ba3dfd75ce84378b22cbcde135a2be0 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-08T12:36:21Z |
| publishDate | 2024-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-4ba3dfd75ce84378b22cbcde135a2be02024-01-21T12:26:20ZengNature PortfolioNature Communications2041-17232024-01-011511910.1038/s41467-024-44722-4Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreductionMingxu Sun0Jiamin Cheng1Miho Yamauchi2Department of Chemistry, Graduate School of Science, Kyushu UniversityResearch Center for Negative Emissions Technologies (K-NETs), Kyushu UniversityDepartment of Chemistry, Graduate School of Science, Kyushu UniversityAbstract Carbon dioxide (CO2) electroreduction reaction (CO2RR) offers a promising strategy for the conversion of CO2 into valuable chemicals and fuels. CO2RR in acidic electrolytes would have various advantages due to the suppression of carbonate formation. However, its reaction rate is severely limited by the slow CO2 diffusion due to the absence of hydroxide that facilitates the CO2 diffusion in an acidic environment. Here, we design an optimal architecture of a gas diffusion electrode (GDE) employing a copper-based ultrathin superhydrophobic macroporous layer, in which the CO2 diffusion is highly enhanced. This GDE retains its applicability even under mechanical deformation conditions. The CO2RR in acidic electrolytes exhibits a Faradaic efficiency of 87% with a partial current density $$( {j}_{{{{\rm{C}}}}_{2+}})$$ ( j C 2 + ) of −1.6 A cm−2 for multicarbon products (C2+), and $$ {j}_{{{{{{\rm{C}}}}}}_{2+}}$$ j C 2 + of −0.34 A cm−2 when applying dilute 25% CO2. In a highly acidic environment, C2+ formation occurs via a second order reaction which is controlled by both the catalyst and its hydroxide.https://doi.org/10.1038/s41467-024-44722-4 |
| spellingShingle | Mingxu Sun Jiamin Cheng Miho Yamauchi Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction Nature Communications |
| title | Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction |
| title_full | Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction |
| title_fullStr | Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction |
| title_full_unstemmed | Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction |
| title_short | Gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic CO2 electroreduction |
| title_sort | gas diffusion enhanced electrode with ultrathin superhydrophobic macropore structure for acidic co2 electroreduction |
| url | https://doi.org/10.1038/s41467-024-44722-4 |
| work_keys_str_mv | AT mingxusun gasdiffusionenhancedelectrodewithultrathinsuperhydrophobicmacroporestructureforacidicco2electroreduction AT jiamincheng gasdiffusionenhancedelectrodewithultrathinsuperhydrophobicmacroporestructureforacidicco2electroreduction AT mihoyamauchi gasdiffusionenhancedelectrodewithultrathinsuperhydrophobicmacroporestructureforacidicco2electroreduction |