Print Email Facebook Twitter Mitigating Electrolyte Flooding for Electrochemical CO2Reduction via Infiltration of Hydrophobic Particles in a Gas Diffusion Layer Title Mitigating Electrolyte Flooding for Electrochemical CO2Reduction via Infiltration of Hydrophobic Particles in a Gas Diffusion Layer Author Wu, Yuming (University of Queensland) Charlesworth, Liam (University of Queensland) Maglaya, Irving (University of Queensland) Idros, Mohamed Nazmi (University of Queensland) Li, Mengran (TU Delft ChemE/Materials for Energy Conversion and Storage) Burdyny, T.E. (TU Delft ChemE/Materials for Energy Conversion and Storage) Wang, Geoff (University of Queensland) Rufford, Thomas E. (University of Queensland) Date 2022 Abstract Achieving operational stability at high current densities remains a challenge in CO2 electrolyzers due to flooding of the gas diffusion layer (GDL) that supports the electrocatalyst. We mitigated electrode flooding at high current densities using a vacuum-assisted infiltration method to embed 200-400 nm-sized polytetrafluoroethylene (PTFE) particles at the interface of the microporous layer (MPL) and carbon cloth in a commercial GDL. In CO2 electrolysis to CO over a silver nanoparticle catalyst on the GDL, the PTFE-embedded GDL not only just exhibited less than 10% of the electrolyte seepage rates observed in untreated GDLs at a current density of 300 mA·cm-2 but also expanded the electrochemical active area across the testing conditions. The PTFE-embedded GDL also maintained a Faradaic efficiency for CO2 electrolysis to CO above 80% for more than 100 h at 100 mA·cm-2, which was a 50-fold improvement in the stable operation time of the electrolyzer. To reference this document use: http://resolver.tudelft.nl/uuid:bfb7f1d1-a3b3-4583-a33c-32eef08e9b20 DOI https://doi.org/10.1021/acsenergylett.2c01555 Embargo date 2023-07-01 ISSN 2380-8195 Source ACS Energy Letters, 7 (9), 2884-2892 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Yuming Wu, Liam Charlesworth, Irving Maglaya, Mohamed Nazmi Idros, Mengran Li, T.E. Burdyny, Geoff Wang, Thomas E. Rufford Files PDF acsenergylett.2c01555.pdf 5.11 MB Close viewer /islandora/object/uuid:bfb7f1d1-a3b3-4583-a33c-32eef08e9b20/datastream/OBJ/view