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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Tuning Hydrogen Binding on Ru Sites by Ni Alloying on MoO₂ Enables Efficient Alkaline Hydrogen Evolution for Anion Exchange Membrane Water Electrolysis

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

Ruthenium (Ru)-based electrocatalysts have shown promise for anion exchange membrane water electrolysis (AEMWE) due to their ability facilitate dissociation in the hydrogen evolution reaction (HER). However, performance is limited by strong binding, which hinders desorption and re-adsorption. This study reports development of RuNi nanoalloys supported on MoO2, optimize binding strength at Ru sites through modulation adjacent Ni atoms. Theoretical simulations reveal that substituting atoms reduces high adsorption Gibbs free energy while maintaining a low barrier dissociation. As result, RuNi/MoO₂ catalyst shows excellent HER with overpotential 51 mV current density 100 mA cm⁻2, outperforming commercial Pt/C. Furthermore, demonstrates turnover frequency (7.06 s-1), mass activity (13.4 A mg-1), price (1030.77 dollar-1). In an AEMWE cell, as cathode achieves 1 cm-2 60 °C just 1.7 V using m KOH. work highlights potential ultra-high efficient applications.

Language: Английский

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Dimension-engineered gold heterostructures with transition metal dichalcogenide for efficient overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 516 - 524

Published: Jan. 31, 2025

Language: Английский

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Photo-assisted synthesis of ternary metal (oxy)hydroxide electrode for enhanced seawater splitting and solar-to-hydrogen conversion

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137410 - 137410

Published: March 1, 2025

Language: Английский

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Bifunctional Ni3S2 nanoflake/NiMoO4 nanoneedle composite electrocatalysts for efficient urea oxidation and hydrogen evolution in sustainable water electrolysis

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162044 - 162044

Published: April 1, 2025

Language: Английский

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Rare-metal single atom catalysts for large scale hydrogen production under actual operating conditions

EES Catalysis, Journal Year: 2024, Volume and Issue: 3(1), P. 32 - 56

Published: Nov. 11, 2024

This review summarizes the research progress made in recent years rational design of RMSACs for large-scale hydrogen production under actual conditions, including high current density, seawater electrolysis and long term operation.

Language: Английский

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