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

Energy Materials, Journal Year: 2025, Volume and Issue: 5(8)

Published: March 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.

Language: Английский

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Scalable production of high-performance electrocatalysts for electrochemical water splitting at large current densities

eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100334 - 100334

Published: Nov. 1, 2024

Language: Английский

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Achievements, challenges and opportunities in hydrogen production from water/seawater splitting using boron-based materials

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Language: Английский

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Seawater Electrolysis: Challenges, Recent Advances, and Future Perspectives

Advanced Sustainable Systems, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract Driven by the advantages of hydrogen energy, such as environmental protection and high energy density, market has an urgent demand for energy. Currently, primary methods production mainly include generation from fossil fuels, industrial by‐products, water electrolysis. Seawater electrolysis production, due to its cleanliness, protection, ease integration with renewable sources, is considered most promising method production. However, seawater faces challenges reduction efficiency impurities in seawater, well costs associated system construction operation. Therefore, it particularly necessary summarize optimization strategies promote development this field. In review, current situation first reviewed. Subsequently, faced are categorized summarized, solutions these discussed detail. Following this, overview situ large‐scale direct at sea presented. Last but not least, suggestions prospects provided.

Language: Английский

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Interface engineering on crystalline Ni3N-amorphous MoOx heterostructures toward high-activity and durability hydrogen electrocatalysis

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 102, P. 171 - 180

Published: Jan. 9, 2025

Language: Английский

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Radio frequency plasma-engraved vacancy engineering towards robust hydrogen-evolving catalysts with large-current stable catalytic activity for over 1000 h

Science China Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 20, 2025

Language: Английский

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Enhanced Acidic CO₂‐to‐C₂₊ Reduction via Ionic Liquid Layer Modification

Small, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Abstract Acidic CO 2 electroreduction reaction (CO RR) garners significant attention as a promising approach for cutting carbon density, it effectively mitigates loss by suppressing carbonate species formation. Unfortunately, achieving efficient multi‐carbon products (C 2+ ) production in acidic media remains challenging due to two main limitations: weak adsorption on Cu sites and competitive H* caused the high concentration protons (H + ). To overcome these challenges, cation‐anion‐modification strategy is proposed using an ionic liquid layer—1‐Propyl‐3‐methylimidazolium bis(trifluoromethylsulfonyl)imide ([PMIM][NTf ])—on surface. Density functional theory calculations predict that PMIM cation strengthens *CO through quasi‐hydrogen bonding, while NTf − anion creates hydrophobic environment, reducing coverage promoting adsorption. Resistance tests demonstrate [PMIM][NTf ] modification reduced proton diffusion. Attenuated total reflection infrared spectroscopy (ATR‐IR) confirmed reinforcement of modified As result, catalyst achieved remarkable partial current density ≈640 mA cm −2 C products, with exceptional faradaic efficiency 80.1% durability ≈20 h at exceeding 500 flow cell. This study highlights potential cation‐anion strategies significantly enhancing RR media.

Language: Английский

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Chloride‐Mediated Electron Buffering on Ni‐Fe Anodes for Ampere‐Level Alkaline Seawater Electrolysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract In water electrolysis, the long‐term stability of anodes is compromised by their degradation under oxidative conditions. This issue becomes more pronounced in seawater where natural chloride ion (Cl − ) induces chlorine evolution reaction (ClER) to produce corrosive byproducts. Herein, a series small organic molecules (SOMs), featuring an aromatic carbon ring with para‐positioned carbonyl groups, are integrated conventional nickel‐iron (Ni‐Fe) based anode. integration triggers unique electron buffering effect address anode seawater‐based electrolytes. It found that preferential adsorption Cl onto SOMs prevents its direct interaction metal active sites. Furthermore, SOM‐Cl serving as group significantly reduces dissolution Fe sites highly environment. As result, SOM‐Cl‐engineered enhances oxygen activity ≈1.7 times compared pure water. addition, rationally designed works stably for over 200 h at high current density 1.3 A cm −2 alkaline electrolyzer (ASE).

Language: Английский

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ZIF-L(Co)-derived NiCoFe LDH@ZIF-67 sheet-array for efficient and robust electrocatalytic seawater splitting

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136855 - 136855

Published: April 1, 2025

Language: Английский

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NiFe-Layered Double Hydroxides Modified with Co–Mo Nitride for the Oxygen Evolution Reaction in Seawater

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Language: Английский

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