Stabilizing Bulk Lattice Oxygen Via the Enhancement of Ir/Ru–O Bonds for Stable Oxidation Catalysts in Acidic Media

Published: Jan. 1, 2025

Language: Английский

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Zinc-doped nickel sulfide/nickel hydroxide heterostructures for efficient and robust selective glucose oxidation reaction

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160396 - 160396

Published: Feb. 1, 2025

Language: Английский

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In Situ Phase Transformation-Induced High-Activity Nickel–Molybdenum Catalyst for Enhancing High-Current-Density Water/Seawater Splitting

ACS Sustainable Chemistry & Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 21, 2025

Anion exchange membrane water electrolyzer (AEMWE) represents a promising sustainable method for large-scale industrial-grade hydrogen manufacturing. However, the sluggish kinetics of bifunctional oxygen/hydrogen evolution reaction (OER/HER) electrocatalysts makes it imperative to develop high-performance anode and cathode materials. Herein, P-doped β-phase NiMoO4 (p-β-NiMoO4) nanorods were first constructed as material HER, then α-phase (p-β-NiMoO4-A) derived by an electrochemical phase transformation mechanism was further applied OER. A series characterizations supported that applying sufficient potential β-NiMoO4 can drive from beta alpha. Compared with directly prepared counterpart, this dynamic results in catalyst tuning atomic configuration environment, modifying electronic state, optimizing *OH adsorption ability. Consequently, assembled two-electrode electrolytic cell system contributes remarkable overall water/seawater splitting capacity outstanding long-term durability even under operating conditions. The AEMWE device ultralow voltage 2.15 V at 2.0 A·cm–2 current density confirms applicability electrocatalysts. This study could provide path realize efficient transition nickel–molybdenum-based materials industrial clean energy conversion.

Language: Английский

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La-Doping-Induced Lattice Strain and Electronic State Modulation in RuO₂ for Electrocatalytic Oxygen Evolution in Acidic Solutions

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

Published: Feb. 25, 2025

Pursuing highly active and stable Ru-based catalysts for the oxygen evolution reaction (OER) under acidic conditions is important in advancing proton exchange membrane (PEM) water electrolyzers. Unfortunately, inadequate stability, especially a large current density of catalysts, still hinders its practical application. Herein, we report La doping strategy that simultaneously enhances both OER activity stability RuO2 media. The introduction into induces tensile strain, which effectively weakens covalency Ru–O bonds. This structural modification significantly inhibits Ru dissolution, thereby substantially enhancing RuO2. Meanwhile, modulates electronic structure optimizes adsorption energy intermediates, electrocatalytic activity. Notably, optimized La0.05-RuO2 electrocatalyst presents an excellent performance 0.5 M H2SO4 electrolyte, delivers low overpotential 190 mV at 10 mA cm–2 sustains 150 h without obvious decay 50 cm–2. More importantly, PEM electrolyzer constructed by using our as anode catalyst, acquires 200 1 A cm–2, highlighting strong potential industrial applications. work sheds new light on designing high-performance toward

Language: Английский

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Interfacial Electronic Structure Engineering of Ultra Small IR Nanoparticles Supported on Defective Graphene for Acidic Bifunctional Water Splitting

Published: Jan. 1, 2025

Language: Английский

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