Electrochemically reconstructed ternary active sites of hierarchical hollow Co-based catalyst for enhancing oxygen evolution reaction

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179819 - 179819

Published: March 1, 2025

Language: Английский

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Bimetallic hydroxysulfide nanoarray electrode enables high-current-density oxygen evolution in alkaline water electrolyzer

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 644, P. 237145 - 237145

Published: April 23, 2025

Language: Английский

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Scalable Fe‐Rich Corroded Steel Wool Electrodes for Industrial Anion Exchange Membrane Water Electrolysis with a Two‐Order‐of‐Magnitude Cost Reduction

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

Published: April 24, 2025

Abstract Alkaline‐based anion exchange membrane water electrolysis (AEMWE) plays a crucial role in sustainable hydrogen production. However, conventional electrode designs rely on expensive nickel‐based materials and complex fabrication processes, limiting their scalability. This study presents cost‐effective scalable approach that transforms ultralow‐cost steel wool into freestanding electrodes for industrial‐scale AEMWE. The fibrous structure, anchoring an activated nickel–iron layered double hydroxide catalyst, enables highly active bifunctional electrode, achieving 1 A cm⁻ 2 at 1.815 V with ultralow degradation rate of ≈0.041 mV h⁻¹ over 1800 h. Unlike electrodes, the interwoven matrix eliminates need porous transport layers forms interlocking interface membrane, significantly enhancing performance durability. Under industrial conditions, prototype AEMWE single stack (≈16 cm ) delivers 16 1.8 nearly 30 2.0 V, maintaining stable operation 400 h under dynamic conditions. iron‐rich system, based one‐pot corrosion process, upcycling mass‐produced m scale cost 4.59 USD m⁻ , 200 times cheaper than electrodes. These findings establish new paradigm cost‐efficient durable design applications.

Language: Английский

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Microzone-Acidification-Driven Degradation Mechanism of the NiFe-Based Anode in Seawater Electrolysis

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(3), P. 3260 - 3269

Published: Jan. 15, 2024

The anode stability is critical for efficient and reliable seawater electrolyzers. Herein, a NiFe-based film catalyst was prepared by anodic oxidation to serve as model electrode, which exhibited satisfactory oxygen evolution performance in simulated alkaline (1 M KOH + 0.5 NaCl) with an overpotential of 348 mV at 100 mA cm–2 long-term over h. After that, the effects current density bulk pH electrolyte on its were evaluated. It found that electrode sensitive electrolysis conditions, failing 20 0.1 NaCl but 500 NaCl. dissolved, some precipitates immediately formed region very close surface during electrolysis. This can be ascribed difference between electrode/electrolyte interface under polarization. In other words, microzone acidification accelerates corrosion Cl–, thus affecting stability. operational performances different conditions classified further analyze degradation behavior, resulted three regions corresponding stable evolution, violent dissolution–precipitation, complete passivation processes, respectively. Thereby increasing could alleviate improve high densities. Overall, this study provides new insights into understanding mechanism catalysts offers engineering strategies application anodes.

Language: Английский

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NiFe-Prussian blue analogs catalyst for glucose electrolytic hydrogen production and biomass valorization

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 86, P. 511 - 518

Published: Aug. 31, 2024

Language: Английский

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