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Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)

To mitigate flooding associated with the gas diffusion layer (GDL) during electroreduction of CO(2), we report a hydrophobicity‐graded hydrophobic GDL (HGGDL). Coating uniformly dispersed polytetrafluoroethylene (PTFE) binders on the carbon fiber skeleton of a hydrophilic GDL uniformizes the hydroph...

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Autores principales: Li, Linbo, Chen, Jun, Mosali, Venkata Sai Sriram, Liang, Yan, Bond, Alan M., Gu, Qinfen, Zhang, Jie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9804220/
https://www.ncbi.nlm.nih.gov/pubmed/35927219
http://dx.doi.org/10.1002/anie.202208534
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author Li, Linbo
Chen, Jun
Mosali, Venkata Sai Sriram
Liang, Yan
Bond, Alan M.
Gu, Qinfen
Zhang, Jie
author_facet Li, Linbo
Chen, Jun
Mosali, Venkata Sai Sriram
Liang, Yan
Bond, Alan M.
Gu, Qinfen
Zhang, Jie
author_sort Li, Linbo
collection PubMed
description To mitigate flooding associated with the gas diffusion layer (GDL) during electroreduction of CO(2), we report a hydrophobicity‐graded hydrophobic GDL (HGGDL). Coating uniformly dispersed polytetrafluoroethylene (PTFE) binders on the carbon fiber skeleton of a hydrophilic GDL uniformizes the hydrophobicity of the GDL and also alleviates the gas blockage of pore channels. Further adherence of the PTFE macroporous layer (PMPL) to one side of the hydrophobic carbon fiber skeleton was aided by sintering. The introduced PMPL shows an appropriate pore size and enhanced hydrophobicity. As a result, the HGGDL offers spatial control of the hydrophobicity and hence water and gas transport over the GDL. Using a nickel‐single‐atom catalyst, the resulting HGGDL electrode provided a CO faradaic efficiency of over 83 % at a constant current density of 75 mA cm(−2) for 103 h operation in a membrane electrode assembly, which is more than 16 times that achieved with a commercial GDL.
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spelling pubmed-98042202023-01-03 Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2) Li, Linbo Chen, Jun Mosali, Venkata Sai Sriram Liang, Yan Bond, Alan M. Gu, Qinfen Zhang, Jie Angew Chem Int Ed Engl Research Articles To mitigate flooding associated with the gas diffusion layer (GDL) during electroreduction of CO(2), we report a hydrophobicity‐graded hydrophobic GDL (HGGDL). Coating uniformly dispersed polytetrafluoroethylene (PTFE) binders on the carbon fiber skeleton of a hydrophilic GDL uniformizes the hydrophobicity of the GDL and also alleviates the gas blockage of pore channels. Further adherence of the PTFE macroporous layer (PMPL) to one side of the hydrophobic carbon fiber skeleton was aided by sintering. The introduced PMPL shows an appropriate pore size and enhanced hydrophobicity. As a result, the HGGDL offers spatial control of the hydrophobicity and hence water and gas transport over the GDL. Using a nickel‐single‐atom catalyst, the resulting HGGDL electrode provided a CO faradaic efficiency of over 83 % at a constant current density of 75 mA cm(−2) for 103 h operation in a membrane electrode assembly, which is more than 16 times that achieved with a commercial GDL. John Wiley and Sons Inc. 2022-08-23 2022-09-26 /pmc/articles/PMC9804220/ /pubmed/35927219 http://dx.doi.org/10.1002/anie.202208534 Text en © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ (https://creativecommons.org/licenses/by-nc/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
spellingShingle Research Articles
Li, Linbo
Chen, Jun
Mosali, Venkata Sai Sriram
Liang, Yan
Bond, Alan M.
Gu, Qinfen
Zhang, Jie
Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title_full Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title_fullStr Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title_full_unstemmed Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title_short Hydrophobicity Graded Gas Diffusion Layer for Stable Electrochemical Reduction of CO(2)
title_sort hydrophobicity graded gas diffusion layer for stable electrochemical reduction of co(2)
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9804220/
https://www.ncbi.nlm.nih.gov/pubmed/35927219
http://dx.doi.org/10.1002/anie.202208534
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AT bondalanm hydrophobicitygradedgasdiffusionlayerforstableelectrochemicalreductionofco2
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