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Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment
Electroreduction of carbon dioxide (CO(2)) over copper-based catalysts provides an attractive approach for sustainable fuel production. While efforts are focused on developing catalytic materials, it is also critical to understand and control the microenvironment around catalytic sites, which can me...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794506/ https://www.ncbi.nlm.nih.gov/pubmed/33420043 http://dx.doi.org/10.1038/s41467-020-20397-5 |
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author | Xing, Zhuo Hu, Lin Ripatti, Donald S. Hu, Xun Feng, Xiaofeng |
author_facet | Xing, Zhuo Hu, Lin Ripatti, Donald S. Hu, Xun Feng, Xiaofeng |
author_sort | Xing, Zhuo |
collection | PubMed |
description | Electroreduction of carbon dioxide (CO(2)) over copper-based catalysts provides an attractive approach for sustainable fuel production. While efforts are focused on developing catalytic materials, it is also critical to understand and control the microenvironment around catalytic sites, which can mediate the transport of reaction species and influence reaction pathways. Here, we show that a hydrophobic microenvironment can significantly enhance CO(2) gas-diffusion electrolysis. For proof-of-concept, we use commercial copper nanoparticles and disperse hydrophobic polytetrafluoroethylene (PTFE) nanoparticles inside the catalyst layer. Consequently, the PTFE-added electrode achieves a greatly improved activity and Faradaic efficiency for CO(2) reduction, with a partial current density >250 mA cm(−2) and a single-pass conversion of 14% at moderate potentials, which are around twice that of a regular electrode without added PTFE. The improvement is attributed to a balanced gas/liquid microenvironment that reduces the diffusion layer thickness, accelerates CO(2) mass transport, and increases CO(2) local concentration for the electrolysis. |
format | Online Article Text |
id | pubmed-7794506 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-77945062021-01-21 Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment Xing, Zhuo Hu, Lin Ripatti, Donald S. Hu, Xun Feng, Xiaofeng Nat Commun Article Electroreduction of carbon dioxide (CO(2)) over copper-based catalysts provides an attractive approach for sustainable fuel production. While efforts are focused on developing catalytic materials, it is also critical to understand and control the microenvironment around catalytic sites, which can mediate the transport of reaction species and influence reaction pathways. Here, we show that a hydrophobic microenvironment can significantly enhance CO(2) gas-diffusion electrolysis. For proof-of-concept, we use commercial copper nanoparticles and disperse hydrophobic polytetrafluoroethylene (PTFE) nanoparticles inside the catalyst layer. Consequently, the PTFE-added electrode achieves a greatly improved activity and Faradaic efficiency for CO(2) reduction, with a partial current density >250 mA cm(−2) and a single-pass conversion of 14% at moderate potentials, which are around twice that of a regular electrode without added PTFE. The improvement is attributed to a balanced gas/liquid microenvironment that reduces the diffusion layer thickness, accelerates CO(2) mass transport, and increases CO(2) local concentration for the electrolysis. Nature Publishing Group UK 2021-01-08 /pmc/articles/PMC7794506/ /pubmed/33420043 http://dx.doi.org/10.1038/s41467-020-20397-5 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Xing, Zhuo Hu, Lin Ripatti, Donald S. Hu, Xun Feng, Xiaofeng Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title | Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title_full | Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title_fullStr | Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title_full_unstemmed | Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title_short | Enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
title_sort | enhancing carbon dioxide gas-diffusion electrolysis by creating a hydrophobic catalyst microenvironment |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7794506/ https://www.ncbi.nlm.nih.gov/pubmed/33420043 http://dx.doi.org/10.1038/s41467-020-20397-5 |
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