Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction
The surface microstructure of a catalyst coating layer directly affects the active area, hydrophilicity and hydrophobicity, and the high porosity is desirable especially for solid–liquid–gas three-phase catalytic reactions. However, it remains challenging to customize catalyst distribution during th...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/13/3/569 |
| _version_ | 1797612908274778112 |
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| author | Mingze Zhu Zexuan Zhu Xiaoyong Xu Chunxiang Xu |
| author_facet | Mingze Zhu Zexuan Zhu Xiaoyong Xu Chunxiang Xu |
| author_sort | Mingze Zhu |
| collection | DOAJ |
| description | The surface microstructure of a catalyst coating layer directly affects the active area, hydrophilicity and hydrophobicity, and the high porosity is desirable especially for solid–liquid–gas three-phase catalytic reactions. However, it remains challenging to customize catalyst distribution during the coating process. Here, we report a simple strategy for achieving ultrafine nanocatalyst deposition in a porous structure via introducing the surfactant into coating inks. For a proof-of-concept demonstration, we spin-coated the nanoscale IrO<sub>2</sub> sol with a surfactant of sodium dodecyl sulfate (SDS) onto the glassy carbon (GC) electrode for oxygen evolution reaction (OER). Due to the surfactant action, the deposited IrO<sub>2</sub> nanocatalyst is evenly distributed and interconnected into a highly porous overlayer, which facilitates electrolyte permeation, gas bubble elimination and active-site accessibility, thus affording high-performance OER in alkaline media. Particularly, the SDS-modified electrodes enable the industrial-level high-current-density performance via enhanced mass transfer kinetics. Such manipulation is effective to improve the coating electrodes’ catalytic activity and stability, and scalable for practical applications and suggestive for other gas-evolving electrodes. |
| first_indexed | 2024-03-11T06:47:30Z |
| format | Article |
| id | doaj.art-3ed6131b25cc4ba3b84670fcbce660ca |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T06:47:30Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-3ed6131b25cc4ba3b84670fcbce660ca2023-11-17T10:11:18ZengMDPI AGCatalysts2073-43442023-03-0113356910.3390/catal13030569Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving ReactionMingze Zhu0Zexuan Zhu1Xiaoyong Xu2Chunxiang Xu3State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, ChinaCollege of Physics Science and Technology, Yangzhou University, Yangzhou 225002, ChinaCollege of Physics Science and Technology, Yangzhou University, Yangzhou 225002, ChinaState Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, ChinaThe surface microstructure of a catalyst coating layer directly affects the active area, hydrophilicity and hydrophobicity, and the high porosity is desirable especially for solid–liquid–gas three-phase catalytic reactions. However, it remains challenging to customize catalyst distribution during the coating process. Here, we report a simple strategy for achieving ultrafine nanocatalyst deposition in a porous structure via introducing the surfactant into coating inks. For a proof-of-concept demonstration, we spin-coated the nanoscale IrO<sub>2</sub> sol with a surfactant of sodium dodecyl sulfate (SDS) onto the glassy carbon (GC) electrode for oxygen evolution reaction (OER). Due to the surfactant action, the deposited IrO<sub>2</sub> nanocatalyst is evenly distributed and interconnected into a highly porous overlayer, which facilitates electrolyte permeation, gas bubble elimination and active-site accessibility, thus affording high-performance OER in alkaline media. Particularly, the SDS-modified electrodes enable the industrial-level high-current-density performance via enhanced mass transfer kinetics. Such manipulation is effective to improve the coating electrodes’ catalytic activity and stability, and scalable for practical applications and suggestive for other gas-evolving electrodes.https://www.mdpi.com/2073-4344/13/3/569surfactantcoatingelectrodeelectrolysis |
| spellingShingle | Mingze Zhu Zexuan Zhu Xiaoyong Xu Chunxiang Xu Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction Catalysts surfactant coating electrode electrolysis |
| title | Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction |
| title_full | Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction |
| title_fullStr | Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction |
| title_full_unstemmed | Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction |
| title_short | Surfactant Improved Interface Morphology and Mass Transfer for Electrochemical Oxygen-Evolving Reaction |
| title_sort | surfactant improved interface morphology and mass transfer for electrochemical oxygen evolving reaction |
| topic | surfactant coating electrode electrolysis |
| url | https://www.mdpi.com/2073-4344/13/3/569 |
| work_keys_str_mv | AT mingzezhu surfactantimprovedinterfacemorphologyandmasstransferforelectrochemicaloxygenevolvingreaction AT zexuanzhu surfactantimprovedinterfacemorphologyandmasstransferforelectrochemicaloxygenevolvingreaction AT xiaoyongxu surfactantimprovedinterfacemorphologyandmasstransferforelectrochemicaloxygenevolvingreaction AT chunxiangxu surfactantimprovedinterfacemorphologyandmasstransferforelectrochemicaloxygenevolvingreaction |