High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly
Abstract Alkaline water electrolysis (AWE) is among the most developed technologies for green hydrogen generation. Despite the tremendous achievements in boosting the catalytic activity of the electrode, the operating current density of modern water electrolyzers is yet much lower than the emerging...
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| Format: | Article |
| Language: | English |
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Wiley
2023-02-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202206180 |
| _version_ | 1827820313140789248 |
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| author | Lingjiao Li Petrus C. M. Laan Xiaoyu Yan Xiaojuan Cao Martijn J. Mekkering Kai Zhao Le Ke Xiaoyi Jiang Xiaoyu Wu Lijun Li Longjian Xue Zhiping Wang Gadi Rothenberg Ning Yan |
| author_facet | Lingjiao Li Petrus C. M. Laan Xiaoyu Yan Xiaojuan Cao Martijn J. Mekkering Kai Zhao Le Ke Xiaoyi Jiang Xiaoyu Wu Lijun Li Longjian Xue Zhiping Wang Gadi Rothenberg Ning Yan |
| author_sort | Lingjiao Li |
| collection | DOAJ |
| description | Abstract Alkaline water electrolysis (AWE) is among the most developed technologies for green hydrogen generation. Despite the tremendous achievements in boosting the catalytic activity of the electrode, the operating current density of modern water electrolyzers is yet much lower than the emerging approaches such as the proton‐exchange membrane water electrolysis (PEMWE). One of the dominant hindering factors is the high overpotentials induced by the gas bubbles. Herein, the bubble dynamics via creating the superaerophobic electrode assembly is optimized. The patterned Co‐Ni phosphide/spinel oxide heterostructure shows complete wetting of water droplet with fast spreading time (≈300 ms) whereas complete underwater bubble repelling with 180° contact angle is achieved. Besides, the current collector/electrode interface is also modified by coating with aerophobic hydroxide on Ti current collector. Thus, in the zero‐gap water electrolyzer test, a current density of 3.5 A cm−2 is obtained at 2.25 V and 85 °C in 6 m KOH, which is comparable with the state‐of‐the‐art PEMWE using Pt‐group metal catalyst. No major performance degradation or materials deterioration is observed after 330 h test. This approach reveals the importance of bubble management in modern AWE, offering a promising solution toward high‐rate water electrolysis. |
| first_indexed | 2024-03-12T01:27:10Z |
| format | Article |
| id | doaj.art-54ecf68fc46a423f898f327a8c86f127 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-12T01:27:10Z |
| publishDate | 2023-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-54ecf68fc46a423f898f327a8c86f1272023-09-12T14:40:47ZengWileyAdvanced Science2198-38442023-02-01104n/an/a10.1002/advs.202206180High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode AssemblyLingjiao Li0Petrus C. M. Laan1Xiaoyu Yan2Xiaojuan Cao3Martijn J. Mekkering4Kai Zhao5Le Ke6Xiaoyi Jiang7Xiaoyu Wu8Lijun Li9Longjian Xue10Zhiping Wang11Gadi Rothenberg12Ning Yan13School of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaVan't Hoff Institute for Molecular Sciences (HIMS) University of Amsterdam Amsterdam 1098XH The NetherlandsSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaVan't Hoff Institute for Molecular Sciences (HIMS) University of Amsterdam Amsterdam 1098XH The NetherlandsSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaSchool of Power and Mechanical Engineering Wuhan University Wuhan 430072 P. R. ChinaSchool of Power and Mechanical Engineering Wuhan University Wuhan 430072 P. R. ChinaSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaVan't Hoff Institute for Molecular Sciences (HIMS) University of Amsterdam Amsterdam 1098XH The NetherlandsSchool of Physics and Technology Wuhan University Wuhan 430072 P. R. ChinaAbstract Alkaline water electrolysis (AWE) is among the most developed technologies for green hydrogen generation. Despite the tremendous achievements in boosting the catalytic activity of the electrode, the operating current density of modern water electrolyzers is yet much lower than the emerging approaches such as the proton‐exchange membrane water electrolysis (PEMWE). One of the dominant hindering factors is the high overpotentials induced by the gas bubbles. Herein, the bubble dynamics via creating the superaerophobic electrode assembly is optimized. The patterned Co‐Ni phosphide/spinel oxide heterostructure shows complete wetting of water droplet with fast spreading time (≈300 ms) whereas complete underwater bubble repelling with 180° contact angle is achieved. Besides, the current collector/electrode interface is also modified by coating with aerophobic hydroxide on Ti current collector. Thus, in the zero‐gap water electrolyzer test, a current density of 3.5 A cm−2 is obtained at 2.25 V and 85 °C in 6 m KOH, which is comparable with the state‐of‐the‐art PEMWE using Pt‐group metal catalyst. No major performance degradation or materials deterioration is observed after 330 h test. This approach reveals the importance of bubble management in modern AWE, offering a promising solution toward high‐rate water electrolysis.https://doi.org/10.1002/advs.202206180alkaline water electrolysisindustrial conditionshydrophilicitybifunctional catalysisbubbles |
| spellingShingle | Lingjiao Li Petrus C. M. Laan Xiaoyu Yan Xiaojuan Cao Martijn J. Mekkering Kai Zhao Le Ke Xiaoyi Jiang Xiaoyu Wu Lijun Li Longjian Xue Zhiping Wang Gadi Rothenberg Ning Yan High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly Advanced Science alkaline water electrolysis industrial conditions hydrophilicity bifunctional catalysis bubbles |
| title | High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly |
| title_full | High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly |
| title_fullStr | High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly |
| title_full_unstemmed | High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly |
| title_short | High‐Rate Alkaline Water Electrolysis at Industrially Relevant Conditions Enabled by Superaerophobic Electrode Assembly |
| title_sort | high rate alkaline water electrolysis at industrially relevant conditions enabled by superaerophobic electrode assembly |
| topic | alkaline water electrolysis industrial conditions hydrophilicity bifunctional catalysis bubbles |
| url | https://doi.org/10.1002/advs.202206180 |
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