Enhancing Water Electrolysis Performance by Bubble Behavior Management

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

Published: Feb. 16, 2025

Abstract Electrocatalytic water splitting for hydrogen generation plays a crucial role in promoting the energy transition and achieving goals of carbon neutrality. Nevertheless, context electrolysis, generated bubbles have an adverse impact on consumption mass transfer efficiency. To address this challenge, variety strategies are investigated to accelerate bubble detachment transport. It is utmost significance summarize those facilitating advancement electrolysis performance. In review, comprehensive account presented enhancing performance through behavior management. First, electrolyte discussed. Then, optimized interactions between electrode surface introduced, which focus reducing adhesion forces implementing other forces. Next, dynamic bubbling deformable catalysts discussed, such as fern‐ caterpillar‐like catalysts. Following that, bubble‐bubble coalescence proved be beneficial earlier departure compared buoyancy effect alone. Finally, outlooks future development efficient removal enhanced The review aims deepen comprehension stimulate management strategies, thereby further electrolysis.

Language: Английский

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Crystallizing Self‐Standing Covalent Organic Framework Membranes for Ultrafast Proton Transport in Flow Batteries

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Oct. 27, 2023

Covalent organic frameworks (COFs) display great potential to be assembled into proton conductive membranes for their uniform and controllable pore structure, yet constructing self-standing COF membrane with high crystallinity fully exploit ordered crystalline channels efficient ionic conduction remains a challenge. Here, macromolecular-mediated crystallization strategy is designed manipulate the of membrane, where -SO3 H groups in introduced sulfonated macromolecule chains function as sites interact precursors thus offer long-range template crystallization. The optimized composed highly-ordered nanopores exhibits conductivity (75 mS cm-1 at 100 % relative humidity 20 °C) excellent flow battery performance, outperforming Nafion 212 reported membranes. Meanwhile, long-term run achieved help anchoring effect flexible chains. Our work provides inspiration design permselective application.

Language: Английский

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Enabling Ultrafine Ru Nanoparticles with Tunable Electronic Structures via a Double-Shell Hollow Interlayer Confinement Strategy toward Enhanced Hydrogen Evolution Reaction Performance

Nano Letters, Journal Year: 2023, Volume and Issue: 24(2), P. 592 - 600

Published: Dec. 1, 2023

Engineering of the catalysts' structural stability and electronic structure could enable high-throughput H

Language: Английский

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Modulating Force of Nucleated Hydrogen Bubble Adhesion to Boost Electrochemical Water Splitting

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 24, 2023

Abstract In electrochemical hydrogen evolution reaction (HER), the produced gas bubbles often adhered to electrode surface and blocked active catalytic site. While different catalysts are developed improve performance of HER, design a durable universal approach for minimizing force nucleated gas‐bubble adhesion prevent blockage electrocatalytic sites because bubbles‐adhesion is unprecedented. Generally, buoyancy should outweigh capillary remove bubbles, which means these forces ratio, Eötvös number E o > 1. Herein, chemically reactive multilayer coating on an reported modulate electrode. A dual modified Ni‐foam provided non‐adhesive superaerophobicity with bubble 4.6 ± 0.3 µN displayed superior HER lower overpotential (333 250 mV) at 100 mA cm −2 respect bare Ni‐foam. The chemically‐modulated low bubble‐adhesion facilitates early removal tiny minimum size 0.64 mm = 0.05 keep available HER. Such positive impact prepared also noted various other electrodes.

Language: Английский

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Engineering one-dimensional transition metal compound nanostructures for electrocatalytic hydrogen evolution: Overview and perspectives

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(89), P. 34677 - 34699

Published: June 11, 2023

Language: Английский

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