Enhanced hydrogen storage performance of g-C3N4/CoMn2O4 nanocomposites

Journal of Materials Science Materials in Electronics, Год журнала: 2024, Номер 35(6)

Опубликована: Фев. 1, 2024

Язык: Английский

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γ-FeOOH Nanosheet with Enormous Cationic Defect: Efficient and Durable Bifunctional Electrocatalyst Suitable for an Industrial-Scale AEM Electrolyzer

ACS Applied Engineering Materials, Год журнала: 2024, Номер 2(4), С. 975 - 987

Опубликована: Апрель 16, 2024

Anion exchange membrane (AEM)-based electrolysis of alkaline water using a transition metal electrocatalyst is supposed to be the effective route for next-generation pure green hydrogen production, but development suitable challenging. Herein, we report simple and scalable protocol grow highly aligned ultrathin iron(III) oxyhydroxide (lepidocrocite, γ-FeOOH) nanosheet on nickel foam (γ-FeOOH-NS-NF) at room temperature (RT) through controlled simultaneous oxidation hydrolysis in presence hydrazine. During synthesis, hydrazine plays crucial multiple roles, one which generation enormous Fe vacancies (VFe). The synthesized γ-FeOOH-NS-NF showed superior bifunctional splitting activity because its thin sheet microstructure cationic defect. Particularly high current density, it an exceptionally low overpotential 320 η1000 Tafel slope 29 OER, 309 mV 65 dec–1 HER aqueous 1 M KOH solution. For overall splitting, 10 mA cm–2 density was observed potential 1.6 V. It 98% Faradaic efficiency excellent stability continuous operation over 100 h 500 density. More importantly, electrode assembly (MEA) having both anode cathode prototype anion (AEM) electrolyzer (4 cm2) outstanding performance stability. experimental results evidenced that grown NF generated VFe are primarily responsible efficient splitting. Thus, robust synthetic technique, direct usability AEM electrolyzer, correspondingly make as industrial-scale production.

Язык: Английский

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Evaluating the water splitting promotion effects of birnessite Mn3+/4+ platelets of α-Mn3O4 coated with Ag@Ag2WO4 nanosphericals

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 61, С. 1028 - 1042

Опубликована: Март 7, 2024

Язык: Английский

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Modulating electronic structure of self-supported nickel-vanadium layered double hydroxide to accelerate hydrogen evolution reaction

Scripta Materialia, Год журнала: 2024, Номер 252, С. 116242 - 116242

Опубликована: Июнь 22, 2024

Язык: Английский

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Ultra-fast synthesis of transition metal-MXene nanocomposite electrocatalyst for energy-saving seawater hydrogen production: Experiment and theory

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 93, С. 1377 - 1392

Опубликована: Ноя. 11, 2024

Язык: Английский

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Empowering the Water Oxidation Activity of the Bimetallic Metal–Organic Framework by Annexing Gold Nanoparticles over the Catalytic Surface

Inorganic Chemistry, Год журнала: 2023, Номер 62(51), С. 21265 - 21276

Опубликована: Дек. 11, 2023

Electrocatalytic water splitting to an anodic oxygen evolution reaction (OER) and a cathodic hydrogen (HER) is believed be the most important application for sustainable generation. Being four-electron, four-proton transfer process, OER plays main obstacle same. Therefore, designing effective electrocatalyst minimize activation energy barrier research topic of prime importance. The metal–organic framework (MOF) with highly porous network considered appropriate candidate in alkaline conditions. Apart from several MOFs, bimetallic one has advantageous electrocatalytic performance due synergistic electronic interaction between two metal ions. However, MOFs have their low conductive nature, therefore, they possess charge kinetics at interface. Surface functionalization via various nanoparticles (NPs) strategy nullifying issue. In this work, we designed CoNi-based MOF that was surface-functionalized by Au NPs (Au@CoNi-Bpy-BTC) under Au@CoNi-Bpy-BTC required overpotential just 330 mV, which 56 mV lower as compared pristine MOF. Impedance analysis confirms improved conductivity interface, where possesses Rct value than CoNi-Bpy-BTC materials. Moreover, Au-decorated shows 8.5 times increase TOF noble toward surface developing electrocatalysts energy-related fields. Overall, report displays exceptional correlation decorated over surface, can regulate activity, confirmed experimental analysis.

Язык: Английский

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A novel polymetallic molybdate and it derived metal sulfide electrocatalyst for water splitting

Fuel, Год журнала: 2024, Номер 380, С. 133272 - 133272

Опубликована: Сен. 24, 2024

Язык: Английский

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Unraveling the Synergistic Role of Sm³⁺ Doped NiFe‐LDH as High‐Performance Electrocatalysts for Improved Anion Exchange Membrane and Water Splitting Applications

Small Methods, Год журнала: 2024, Номер unknown

Опубликована: Дек. 17, 2024

Effective first-row transition metal-based electrocatalysts are crucial for large-scale hydrogen energy generation and anion exchange membrane (AEM) devices in water splitting. The present work describes that SmNi

Язык: Английский

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