Green hydrogen for a sustainable future: A review of production methods, innovations, and applications

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 111, P. 319 - 341

Published: Feb. 26, 2025

Language: Английский

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Promoting in-situ stability of hydroxide exchange membranes by thermally conductive network for durable water electrolysis

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Jan. 22, 2025

Hydroxide exchange membrane (HEM) water electrolysis is promising for green hydrogen production due to its low cost and excellent performance. However, HEM often has insufficient stability in strong alkaline solutions, particularly under in-situ operation conditions, hindering commercialization. In this study, we discover that the of primarily impaired by locally accumulated heat thermal conductivity. Accordingly, propose highly thermally conductive HEMs with an efficient three-dimensional (3D) diffusion network promote electrolysis. Based on 3D network, conductivity polymeric boosted 32 times thereby reduce temperature up 4.9 °C a electrolyzer at current density 1 A cm−2. Thus, exhibits negligible degradation after 20,000 start/stop cycles reduces rate 6 compared pure electrolyzer. This study manifests significance durability electrolysis, which provides guidelines rational design durable practical conditions fuel cells, beyond. membranes are desirable but limited their instability operational conditions. Here, authors find affected can be enhanced membranes.

Language: Английский

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Inherent Ultrahigh Proton Conductivity of Two Highly Stable COOH-Functionalized Hafnium-Based Metal–Organic Frameworks

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Although there has been some recent interest in the proton conductivity (σ) of highly stable carboxyl metal–organic frameworks (MOFs) made tetravalent metal ions, given their potential applications fuel cells and electrochemical sensing, research on MOFs constructed by hafnium(IV) ions needs to be expanded significantly. Based this, we used two common easily prepared phenylpoly(carboxylic acid) ligands, 1,2,4-phenyltricarboxylic acid 1,2,4,5-phenyltetracarboxylic acid, react with hafnium tetrachloride, respectively, creating porous hafnium(IV)-based MOFs, UiO-66-COOH-Hf (1) UiO-66-(COOH)2-Hf (2), same structure as UiO-66-Hf but different numbers free carboxylic groups. A series stability assays revealed that had excellent structural rigidity, including thermal water stability. More crucially, alternating current impedance experiments demonstrate σ varies positively humidity temperature, reaching up 10–3 S·cm–1 (1: 2.83 × 2: 4.35 S·cm–1) under right conditions (98% relative 100 °C). The latter roughly doubles former, which is due difference number groups, confirmed analysis conduction mechanism investigation. high intrinsic lays a solid foundation for future application affords new inspiration developing high-performance proton-conductive materials.

Language: Английский

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Porous Transport Layers for Anion Exchange Membrane Water Electrolysis: The Impact of Morphology and Composition

ACS electrochemistry., Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 7, 2025

Anion exchange membrane water electrolysis (AEMWE) is an emerging technology for the low-cost production of hydrogen. However, efficiency and durability AEMWE devices currently insufficient to compete with other low-temperature technologies. The porous transport layer (PTL) a critical cell component that remains relatively unoptimized AEMWE. In this study, we demonstrate device performance significantly affected by morphology composition PTL. For Ni fiber-based PTLs ∼2 μm Co3O4 oxygen evolution reaction catalyst layer, decreasing pore size porosity resulted in 20% increase current density at 2 V 1 M KOH supporting electrolyte. Alloy even lower had higher performance; particular, stainless steel PTL gave 80% relative Ni. Without Co3O4, alloy still demonstrated high activity, indicating material was catalytically active. characterization electrode electrolyte after testing indicated also underwent restructuring corrosion processes may limit long-term stability. This study demonstrates design improved important area focus achieve targets.

Language: Английский

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Advancements in electrolyser stack performance: A comprehensive review of Latest technologies and efficiency strategies

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

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Hydroxide exchange membranes towards water electrolysis and fuel cells: A review on the recent advances, challenges and opportunities

Advanced Membranes, Journal Year: 2024, Volume and Issue: unknown, P. 100111 - 100111

Published: Nov. 1, 2024

Language: Английский

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Experimental integration of a foam-based floating photovoltaic (floatovoltaic) system with an anion exchange membrane electrolyzer for 5 kW-Scale green hydrogen production

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 138, P. 260 - 272

Published: May 16, 2025

Language: Английский

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Deciphering the active species of anodically activated carbon-based electrocatalysts for oxygen evolution reaction

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 111417 - 111417

Published: June 1, 2025

Language: Английский

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Core@Shell Pt₃Co@Pt/C Nanoparticles as an Electrocatalyst for the Oxygen Reduction Reaction

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Language: Английский

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