Challenges and strategies in catalysts design towards efficient and durable alkaline seawater electrolysis for green hydrogen production

Energy Materials, Год журнала: 2025, Номер 5(8)

Опубликована: Март 21, 2025

Seawater electrolysis offers a sustainable solution for hydrogen production by utilizing ocean water as an electrolyte. However, the chlorine evolution reaction (ClER) and accumulation of magnesium calcium precipitates pose significant challenges to efficiency durability. ClER competes with oxygen reaction, reducing output accelerating electrode degradation, while precipitate formation on cathode blocks catalytic sites impairs long-term performance. Anion exchange membrane electrolyzers tackle these leveraging alkaline media suppress enhance catalyst stability. Recent advances in selective catalysts, protective coatings, alternative oxidation reactions further improve selectivity energy efficiency. Additionally, strategies such surface engineering pH modulation mitigate formation, ensuring stable operation. Scaling innovations into anion electrolyzer systems demonstrates their potential industrial-level production. By overcoming fundamental practical barriers, seawater toward commercial deployment future.

Язык: Английский

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A Zero‐gap Electrolyzer Enables Supporting Electrolyte‐free Seawater Splitting for Energy‐saving Hydrogen Production

Angewandte Chemie, Год журнала: 2025, Номер unknown

Опубликована: Янв. 4, 2025

Abstract Membrane‐assisted direct seawater splitting (DSS) technologies are actively studied as a promising route to produce green hydrogen (H 2 ), whereas the indispensable use of supporting electrolytes that help extract water and provide electrochemically‐accelerated reaction media results in severe energy penalty, consuming up 12.5 % input when using typical KOH electrolyte. We bypass this issue by designing zero‐gap electrolyzer configuration based on integration cation exchange membrane bipolar assemblies, which protects stable DSS operation against precipitates corrosion absence additional electrolytes. The heterolytic dissociation function situ creates an asymmetric acidic‐alkaline environment, kinetically facilitating H O evolution reactions. When working natural without any chemical inputs, sustains nearly 100 Faradaic efficiency toward for 120 h at current density mA cm −2 . With high‐integrity merit, our can be facilely scaled into practical cell stacks with significantly increased active area prospects volume/space‐sensitive application scenarios. This concept opens underexplored design space energy‐saving production from low‐grade saline sources, being complementary to, potentially competitive pre‐purification Schemes.

Язык: Английский

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A Zero‐gap Electrolyzer Enables Supporting Electrolyte‐free Seawater Splitting for Energy‐saving Hydrogen Production

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Янв. 4, 2025

Abstract Membrane‐assisted direct seawater splitting (DSS) technologies are actively studied as a promising route to produce green hydrogen (H 2 ), whereas the indispensable use of supporting electrolytes that help extract water and provide electrochemically‐accelerated reaction media results in severe energy penalty, consuming up 12.5 % input when using typical KOH electrolyte. We bypass this issue by designing zero‐gap electrolyzer configuration based on integration cation exchange membrane bipolar assemblies, which protects stable DSS operation against precipitates corrosion absence additional electrolytes. The heterolytic dissociation function situ creates an asymmetric acidic‐alkaline environment, kinetically facilitating H O evolution reactions. When working natural without any chemical inputs, sustains nearly 100 Faradaic efficiency toward for 120 h at current density mA cm −2 . With high‐integrity merit, our can be facilely scaled into practical cell stacks with significantly increased active area prospects volume/space‐sensitive application scenarios. This concept opens underexplored design space energy‐saving production from low‐grade saline sources, being complementary to, potentially competitive pre‐purification Schemes.

Язык: Английский

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Construction of chlorine-free electrical double layer for efficient seawater oxidation

Coordination Chemistry Reviews, Год журнала: 2025, Номер 529, С. 216463 - 216463

Опубликована: Янв. 21, 2025

Язык: Английский

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Comprehensive Chlorine Suppression: Advances in Materials and System Technologies for Direct Seawater Electrolysis

Nano-Micro Letters, Год журнала: 2025, Номер 17(1)

Опубликована: Янв. 22, 2025

Abstract Seawater electrolysis offers a promising pathway to generate green hydrogen, which is crucial for the net-zero emission targets. Indirect seawater severely limited by high energy demands and system complexity, while direct bypasses pre-treatment, offering simpler more cost-effective solution. However, chlorine evolution reaction impurities in lead severe corrosion hinder electrolysis’s efficiency. Herein, we review recent advances rational design of chlorine-suppressive catalysts integrated systems architectures chloride-induced corrosion, with simultaneous enhancement Faradaic efficiency reduction cost. Furthermore, directions are proposed durable efficient systems. This provides perspectives toward sustainable conversion environmental protection.

Язык: Английский

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Hard Lewis acid induced chloride repulsion for durable neutral seawater electrolysis

Nano Energy, Год журнала: 2025, Номер unknown, С. 110714 - 110714

Опубликована: Янв. 1, 2025

Язык: Английский

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Modulating Selectivity and Stability of the Direct Seawater Electrolysis for Sustainable Green Hydrogen Production

Materials Today Catalysis, Год журнала: 2025, Номер unknown, С. 100089 - 100089

Опубликована: Фев. 1, 2025

Язык: Английский

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Wide-area tip-like effect boosting electrocatalytic sulfion oxidation for energy-efficient hydrogen production in seawater electrolysis

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161611 - 161611

Опубликована: Март 1, 2025

Язык: Английский

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Mixed ionic conductor brings extra gain in oxygen-evolving activity of NiFe hydroxide electrocatalyst at practical working temperature

Applied Catalysis B Environment and Energy, Год журнала: 2025, Номер unknown, С. 125271 - 125271

Опубликована: Март 1, 2025

Язык: Английский

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Dynamic competitive adsorption mechanism was constructed by Mo incorporation to achieve the high activity and durability electrolysis of saline-alkali water for hydrogen production

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 162279 - 162279

Опубликована: Апрель 1, 2025

Язык: Английский

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