Self-sustaining alkaline seawater electrolysis via forward osmosis membranes
Seawater electrolysis for hydrogen production faces inherent challenges, including side reactions, corrosion, and scaling, stemming from the intricate composition of seawater. In response, researchers have turned to continuous water splitting using forward osmosis (FO)-driven seawater desalination....
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2025-03-01
|
| Series: | Green Energy & Environment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S246802572400102X |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850040642251522048 |
|---|---|
| author | Ke Shi Hongyi Wan Keyu Wang Fumohan Fang Shiyi Li Yixing Wang Linfeng Lei Linzhou Zhuang Zhi Xu |
| author_facet | Ke Shi Hongyi Wan Keyu Wang Fumohan Fang Shiyi Li Yixing Wang Linfeng Lei Linzhou Zhuang Zhi Xu |
| author_sort | Ke Shi |
| collection | DOAJ |
| description | Seawater electrolysis for hydrogen production faces inherent challenges, including side reactions, corrosion, and scaling, stemming from the intricate composition of seawater. In response, researchers have turned to continuous water splitting using forward osmosis (FO)-driven seawater desalination. However, the necessity of a neutral electrolyte hampers this strategy due to the limited current density and scarcity of precious metals. Herein, this study applies alkali-durable FO membranes to enable self-sustaining seawater splitting, which can selectively withdraw water molecules, from seawater, via concentration gradient. The membranes demonstrates outstanding perm-selectivity of water/ions (∼5830 mol mol−1) during month-long alkaline resistance tests, preventing electrolyte leaching (>97% OH− retention) while maintaining ∼95% water balance (VFO = Velectrolysis) via preserved concentration gradient for consistent forward-osmosis influx of water molecules. With the consistent electrolyte environment protected by the polyamide FO membranes, the NiFe-Ar-P catalyst exhibits promising performance: a sustain current density of 360 mA cm−2 maintained at the cell voltage of 2.10 V and 2.15 V for 360 h in the offshore seawater, preventing Cl/Br corrosion (98% rejection) and Mg/Ca passivation (99.6% rejection). This research marks a significant advancement towards efficient and durable seawater-based hydrogen production. |
| format | Article |
| id | doaj-art-3eaf52f02f4548d78851db6b93bd4eec |
| institution | DOAJ |
| issn | 2468-0257 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Green Energy & Environment |
| spelling | doaj-art-3eaf52f02f4548d78851db6b93bd4eec2025-08-20T02:56:02ZengKeAi Communications Co., Ltd.Green Energy & Environment2468-02572025-03-0110351852710.1016/j.gee.2024.04.003Self-sustaining alkaline seawater electrolysis via forward osmosis membranesKe Shi0Hongyi Wan1Keyu Wang2Fumohan Fang3Shiyi Li4Yixing Wang5Linfeng Lei6Linzhou Zhuang7Zhi Xu8State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan, Yueyang, 414000, China; Corresponding authors.State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Suzhou Laboratory, Suzhou, 215000, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Suzhou Laboratory, Suzhou, 215000, ChinaState Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Corresponding authors.State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; Corresponding authors.Seawater electrolysis for hydrogen production faces inherent challenges, including side reactions, corrosion, and scaling, stemming from the intricate composition of seawater. In response, researchers have turned to continuous water splitting using forward osmosis (FO)-driven seawater desalination. However, the necessity of a neutral electrolyte hampers this strategy due to the limited current density and scarcity of precious metals. Herein, this study applies alkali-durable FO membranes to enable self-sustaining seawater splitting, which can selectively withdraw water molecules, from seawater, via concentration gradient. The membranes demonstrates outstanding perm-selectivity of water/ions (∼5830 mol mol−1) during month-long alkaline resistance tests, preventing electrolyte leaching (>97% OH− retention) while maintaining ∼95% water balance (VFO = Velectrolysis) via preserved concentration gradient for consistent forward-osmosis influx of water molecules. With the consistent electrolyte environment protected by the polyamide FO membranes, the NiFe-Ar-P catalyst exhibits promising performance: a sustain current density of 360 mA cm−2 maintained at the cell voltage of 2.10 V and 2.15 V for 360 h in the offshore seawater, preventing Cl/Br corrosion (98% rejection) and Mg/Ca passivation (99.6% rejection). This research marks a significant advancement towards efficient and durable seawater-based hydrogen production.http://www.sciencedirect.com/science/article/pii/S246802572400102XAlkaline water electrolysisForward osmosisSelf-sustaining seawater splittingHydrogen evolutionReal seawater |
| spellingShingle | Ke Shi Hongyi Wan Keyu Wang Fumohan Fang Shiyi Li Yixing Wang Linfeng Lei Linzhou Zhuang Zhi Xu Self-sustaining alkaline seawater electrolysis via forward osmosis membranes Green Energy & Environment Alkaline water electrolysis Forward osmosis Self-sustaining seawater splitting Hydrogen evolution Real seawater |
| title | Self-sustaining alkaline seawater electrolysis via forward osmosis membranes |
| title_full | Self-sustaining alkaline seawater electrolysis via forward osmosis membranes |
| title_fullStr | Self-sustaining alkaline seawater electrolysis via forward osmosis membranes |
| title_full_unstemmed | Self-sustaining alkaline seawater electrolysis via forward osmosis membranes |
| title_short | Self-sustaining alkaline seawater electrolysis via forward osmosis membranes |
| title_sort | self sustaining alkaline seawater electrolysis via forward osmosis membranes |
| topic | Alkaline water electrolysis Forward osmosis Self-sustaining seawater splitting Hydrogen evolution Real seawater |
| url | http://www.sciencedirect.com/science/article/pii/S246802572400102X |
| work_keys_str_mv | AT keshi selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT hongyiwan selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT keyuwang selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT fumohanfang selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT shiyili selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT yixingwang selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT linfenglei selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT linzhouzhuang selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes AT zhixu selfsustainingalkalineseawaterelectrolysisviaforwardosmosismembranes |