Bipolar Membrane Seawater Splitting for Hydrogen Production: A Review

ACS Omega, Год журнала: 2024, Номер 9(13), С. 14704 - 14727

Опубликована: Март 23, 2024

The growing demand for clean energy has spurred the quest sustainable alternatives to fossil fuels. Hydrogen emerged as a promising candidate with its exceptional heating value and zero emissions upon combustion. However, conventional hydrogen production methods contribute CO2 emissions, necessitating environmentally friendly alternatives. With vast potential, seawater garnered attention valuable resource production, especially in arid coastal regions surplus renewable energy. Direct electrolysis presents viable option, although it faces challenges such corrosion, competing reactions, presence of various impurities. To enhance efficiency overcome these challenges, researchers have turned bipolar membranes (BPMs). These create two distinct pH environments selectively facilitate water dissociation by allowing passage protons hydroxide ions, while acting barrier cations anions. Moreover, catalysts at BPM junction or interface can further accelerate dissociation. Alongside thermodynamic system is significantly influenced potential BPMs. By exploiting unique properties, BPMs offer solution improve overall processes. This paper reviews electrolysis, including mechanism, recent advancements synthesis, encountered electrolysis. Furthermore, explores strategies optimize reaction BPMs, paving way from seawater.

Язык: Английский

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Poly(aryl piperidinium)‐Based AEMs Utilizing Spirobifluorene as a Branching Agent

Advanced Functional Materials, Год журнала: 2024, Номер 34(48)

Опубликована: Июль 15, 2024

Abstract The high‐performance anion exchange membranes (AEMs) are developed by incorporating 9,9′‐spirobifluorene as a 3D branching agent, addressing the common trade‐off between ion conductivity and dimensional/mechanical stability. By fine‐tuning ratio of terphenyl to biphenyl amount AEM is refined, achieving high (≈190 mS cm −1 at 80 °C in 1 m KOH) with decent properties, comparable recently reported state‐of‐the‐art membranes. Investigations using gas pycnometer atomic force microscopy demonstrated that spirobifluorene enhances fractional free volume around membrane's backbone more precisely modulates separation hydrophobic hydrophilic domains, thus boosting both mechanical This membrane also displayed excellent chemical stability, negligible degradation KOH over 1,000 h. With such membrane, an cell performance achieved, current density 11.2 A − 2 V KOH, 1.8 pure water conditions. situ stability test, conducted constant for 500 h, showed no significant degradation.

Язык: Английский

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

ACS electrochemistry., Год журнала: 2025, Номер unknown

Опубликована: Фев. 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.

Язык: Английский

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Side reactions in photocatalytic H2 production by overall water splitting

Journal of Material Science and Technology, Год журнала: 2025, Номер unknown

Опубликована: Фев. 1, 2025

Язык: Английский

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Interfacial Engineering of MoS₂ and Bimetallic MOF Hybrid for Superior Piezo-Photocatalytic Hydrogen Production and Wastewater Treatment

Journal of Alloys and Compounds, Год журнала: 2025, Номер unknown, С. 179304 - 179304

Опубликована: Фев. 1, 2025

Язык: Английский

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