Intermetallic Fe2Mo Nanoparticles on Hierarchical Nanoporous Copper for Efficient Hydrogen Evolution Reaction

Catalysts, Год журнала: 2025, Номер 15(3), С. 278 - 278

Опубликована: Март 16, 2025

Developing cost-effective and high-performance non-precious metal-based electrocatalysts for hydrogen evolution reaction is of crucial importance toward sustainable energy systems. Herein, we prepare a novel hybrid electrode featuring intermetallic Fe2Mo nanoparticles anchored on the hierarchical nanoporous copper skeleton as robust electrocatalyst by simple scalable alloying dealloying methods. By virtue highly active unique bicontinuous facilitating ion/molecule transportation, Fe2Mo/Cu shows excellent electrocatalysis, with low Tafel slope (~71 mV dec−1) to realize ampere-level current density 1 A cm−2 at overpotential ~200 in M KOH electrolyte. Furthermore, exhibits long−term stability exceeding 400 h maintain ~250 mA an 150 mV. Such outstanding electrocatalytic performance enables be attractive catalyst water splitting economy.

Язык: Английский

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Lamellar Nanoporous Intermetallic Cobalt-Titanium Multisite Electrocatalyst with Extraordinary Activity and Durability for the Hydrogen Evolution Reaction

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Constructing well-defined multisites with high activity and durability is crucial for the development of highly efficient electrocatalysts toward multiple-intermediate reactions. Here we report negative mixing enthalpy caused intermetallic cobalt-titanium (Co3Ti) nanoprecipitates on a lamellar hierarchical nanoporous cobalt skeleton as high-performance nonprecious multisite electrocatalyst an alkaline hydrogen evolution reaction. The Co3Ti robust substantially boosts reaction kinetics water dissociation adsorption/combination by unisonous adsorptions hydroxyl intermediates proper binding energies. By virtue bicontinuous that enables sufficiently accessible facilitates electron transfer ion/molecule transportation, self-supported heterogeneous electrode exhibits extraordinary electrocatalytic in 1 M KOH. It reaches current density ∼3.31 A cm–2 at low overpotential 200 mV maintains exceptional stability ∼1.33 >1000 h.

Язык: Английский

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Electrocatalytic hydrogen evolution performance of RuO2 nanorods grown on top of WO3 nanotube arrays

Опубликована: Апрель 3, 2025

Water electrolysis has been deemed as a simple, safe, and clean way to realize sustainable hydrogen production. However, efficacious water for production is highly dependent on efficient stable electrocatalysts. Herein, we report nanorod/nanotube array composite electrocatalyst toward evolution reaction (HER) in both basic acidic electrolytes. For the composite, One-dimensional RuO₂ nanorods (NRs) were grown top of WO₃ nanotube arrays (NTA) through facile solution impregnation method followed by high-temperature calcination. The obtained NRs/WO₃ NTA demonstrates superb electrocatalytic activity HER medias. To achieve current density 10 mA cm^{− 2}, required overpotentials are 33 mV 1 M KOH 62 0.5 H₂SO₄, respectively. Furthermore, also shows an excellent long-term electrochemical stability alkaline superior most reported RuO₂-based Ru-based electrocatalysts, even comparable state-of-the-art Pt/C catalyst. could be attributed structural merits including large surface area with abundant catalytically active sites, specific charge transport channel ensuring enhanced kinetics favorable bubble formation release. present work sheds new light designing novel one-dimensional structures generation. Simultaneously, designed structure this expected applied other energy conversion devices.

Язык: Английский

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VN/Copper foam self-supporting catalyst for efficient electrocatalytic hydrogen peroxide generation

Materials Today Catalysis, Год журнала: 2025, Номер unknown, С. 100102 - 100102

Опубликована: Май 1, 2025

Язык: Английский

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Self-supported transition-metal-based electrocatalysts on iron foam for water splitting

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 163602 - 163602

Опубликована: Май 1, 2025

Язык: Английский

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Electrocatalytic hydrogen evolution performance of RuO2 nanorods grown on top of WO3 nanotube arrays

Ionics, Год журнала: 2025, Номер unknown

Опубликована: Май 30, 2025

Язык: Английский

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