Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis
Abstract Seawater electrolysis holds great promise for sustainable, green hydrogen production but faces challenges of high overpotentials and competing chlorine evolution reaction (CER). Replacing the oxygen evolution reaction with the methanol oxidation reaction (MOR) presents a compelling alternat...
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Wiley
2025-04-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202410911 |
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| author | Zhen Li Youbin Zheng Wenhan Zu Liang Dong Lawrence Yoon Suk Lee |
| author_facet | Zhen Li Youbin Zheng Wenhan Zu Liang Dong Lawrence Yoon Suk Lee |
| author_sort | Zhen Li |
| collection | DOAJ |
| description | Abstract Seawater electrolysis holds great promise for sustainable, green hydrogen production but faces challenges of high overpotentials and competing chlorine evolution reaction (CER). Replacing the oxygen evolution reaction with the methanol oxidation reaction (MOR) presents a compelling alternative due to its lower anodic potential which mitigates the risk of CER. While NiOOH is known for its MOR activity, its performance is limited by sluggish non‐electrochemical kinetics and Cl‐induced degradation. Herein, a MoO42−‐modified NiOOH electrocatalyst is reported that significantly enhances MOR‐assisted seawater splitting efficiency. In situ leached MoO42− from the heterojunction optimizes methanol adsorption and facilitates proton migration, thereby accelerating the non‐electrochemical steps in MOR. Additionally, the adsorbed MoO42− effectively repels Cl−, protecting the electrodes from Cl−‐induced corrosion. The MOR‐assisted electrolyzer using NiMo||Ni(OH)2/NiMoO₄ requires only 1.312 V to achieve 10 mA cm−2, substantially lower than conventional alkaline seawater electrolysis (1.576 V). Furthermore, it demonstrates remarkable stability, sustaining high current densities (up to 1.0 A cm−2) for over 130 h. This work presents a promising strategy for designing high‐performance electrocatalysts for efficient and sustainable green hydrogen production from seawater. |
| format | Article |
| id | doaj-art-dd98259ae3a54c71bdf53c0157fe6ebd |
| institution | DOAJ |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
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| series | Advanced Science |
| spelling | doaj-art-dd98259ae3a54c71bdf53c0157fe6ebd2025-08-20T03:09:08ZengWileyAdvanced Science2198-38442025-04-011214n/an/a10.1002/advs.202410911Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater ElectrolysisZhen Li0Youbin Zheng1Wenhan Zu2Liang Dong3Lawrence Yoon Suk Lee4Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR ChinaKey Laboratory of Dielectric and Electrolyte Functional Material School of Resources and Materials Northeastern University at Qinhuangdao Qinhuangdao Hebei 066004 ChinaDepartment of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR ChinaKey Laboratory of Dielectric and Electrolyte Functional Material School of Resources and Materials Northeastern University at Qinhuangdao Qinhuangdao Hebei 066004 ChinaDepartment of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong SAR ChinaAbstract Seawater electrolysis holds great promise for sustainable, green hydrogen production but faces challenges of high overpotentials and competing chlorine evolution reaction (CER). Replacing the oxygen evolution reaction with the methanol oxidation reaction (MOR) presents a compelling alternative due to its lower anodic potential which mitigates the risk of CER. While NiOOH is known for its MOR activity, its performance is limited by sluggish non‐electrochemical kinetics and Cl‐induced degradation. Herein, a MoO42−‐modified NiOOH electrocatalyst is reported that significantly enhances MOR‐assisted seawater splitting efficiency. In situ leached MoO42− from the heterojunction optimizes methanol adsorption and facilitates proton migration, thereby accelerating the non‐electrochemical steps in MOR. Additionally, the adsorbed MoO42− effectively repels Cl−, protecting the electrodes from Cl−‐induced corrosion. The MOR‐assisted electrolyzer using NiMo||Ni(OH)2/NiMoO₄ requires only 1.312 V to achieve 10 mA cm−2, substantially lower than conventional alkaline seawater electrolysis (1.576 V). Furthermore, it demonstrates remarkable stability, sustaining high current densities (up to 1.0 A cm−2) for over 130 h. This work presents a promising strategy for designing high‐performance electrocatalysts for efficient and sustainable green hydrogen production from seawater.https://doi.org/10.1002/advs.202410911anti‐corrosiondirect seawater electrolysismethanol electrooxidationmolybdate modulationnon‐electrochemical process |
| spellingShingle | Zhen Li Youbin Zheng Wenhan Zu Liang Dong Lawrence Yoon Suk Lee Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis Advanced Science anti‐corrosion direct seawater electrolysis methanol electrooxidation molybdate modulation non‐electrochemical process |
| title | Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis |
| title_full | Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis |
| title_fullStr | Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis |
| title_full_unstemmed | Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis |
| title_short | Molybdate‐Modified NiOOH for Efficient Methanol‐Assisted Seawater Electrolysis |
| title_sort | molybdate modified niooh for efficient methanol assisted seawater electrolysis |
| topic | anti‐corrosion direct seawater electrolysis methanol electrooxidation molybdate modulation non‐electrochemical process |
| url | https://doi.org/10.1002/advs.202410911 |
| work_keys_str_mv | AT zhenli molybdatemodifiednioohforefficientmethanolassistedseawaterelectrolysis AT youbinzheng molybdatemodifiednioohforefficientmethanolassistedseawaterelectrolysis AT wenhanzu molybdatemodifiednioohforefficientmethanolassistedseawaterelectrolysis AT liangdong molybdatemodifiednioohforefficientmethanolassistedseawaterelectrolysis AT lawrenceyoonsuklee molybdatemodifiednioohforefficientmethanolassistedseawaterelectrolysis |