Anticorrosion and discharge performance of calcium and neodymium co-doped AZ61 alloy anodes for Mg-air batteries

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 193, P. 132 - 145

Published: Feb. 16, 2024

Language: Английский

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Unlocking the potential of hydrogen evolution: Advancements in 3D nanostructured electrocatalysts supported on nickel foam

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 355, P. 124197 - 124197

Published: May 12, 2024

Language: Английский

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Fe-doped Ni₃S₂/NiS heterojunction with improved electrocatalytic activity and stability for the alkaline oxygen evolution reaction

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

Published: Jan. 1, 2025

The heterostructure catalyst Fe-Ni 3 S 2 /NiS exhibits excellent activity and stability. doped Fe acts as a sacrificial agent in the oxygen evolution reaction (OER), maintaining high of Ni, preventing Ni–S bond degradation.

Language: Английский

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Influence of trace Mn doping on the high-speed shear performance of lead-free alloy/copper solder joints: Experimental and first principles investigation

Surfaces and Interfaces, Journal Year: 2024, Volume and Issue: 51, P. 104477 - 104477

Published: May 31, 2024

This study aims to investigate the mechanical properties changes and underlying reasons caused by Mn addition Cu6Sn5 intermetallic compounds (IMC). For this purpose, 0.07 wt.% doped SnAgCu (SAC)305/Cu joint were prepared observe its shear performance at a high speed of 1000 mm/min after aging 170°C for 750 h. The Mn-doped samples exhibited smaller decline aging, in comparison undoped samples. Notably, fracture location transitioned from interior SAC interface doping. Nanoindentation experiments demonstrated significant increase modulus hardness Cu3Sn phases. To gain deeper understanding mechanisms driving IMC properties, first principles calculations employed. introduction resulted strengthened bonding due hybridization Sn atoms high-energy regions, leading formation charge-enriched areas improved IMC. results obtained both computational experimental approaches exhibit similar trends these changes. Moreover, integration methods provides guidance advancing research enhancing our their behavior.

Language: Английский

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NiSe₂-Nanooctahedron as an Efficient Electrocatalyst for Overall Water Splitting

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Hydrogen production through electrocatalysis has attracted much attention due to negligible environmental pollution by using renewable electrical energy. To bring electrolysis technology cost parity, a nonprecious, stable, and earth-abundant transition-metal-based bifunctional catalyst is desired for overall water splitting. Herein, we report the synthesis of NiSe2 nanoparticles simple, template-free, single-step solvothermal method varying reaction medium, i.e., either or propanol their mixture. Using ethylenediaminetetraacetic acid (EDTA) as structure-directing agent, nanooctahedron-shaped particles are synthesized first time. The nanosized octahedron demonstrated potential electrocatalyst both hydrogen evolution (HER) oxygen (OER) in an alkaline medium. For evolution, small overpotential 119 mV needed generate current density 10 mA cm–2, whereas 345 required delivering 50 cm–2. Furthermore, electrolyzer with NiSe2-nanooctahedrons delivers cm–2 at cell voltage 1.55 V splitting shows excellent stability change 20 h.

Language: Английский

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Dispersive micro-solid phase extraction (D-μSPE) of nickel on activated nanodiamonds@Bi2WO6 nanocomposite from water and food samples

Food Chemistry, Journal Year: 2024, Volume and Issue: 450, P. 139351 - 139351

Published: April 15, 2024

Language: Английский

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Nanoporous Metal/Covalent Organic Framework-Based Electrocatalysts for Water Splitting

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(8), P. 8424 - 8444

Published: April 18, 2024

In today's technological era, the increased consumption of fossil fuels has taken a severe toll on environment. response to this, researchers are actively pursuing develop efficient methods such as water splitting obtain cleaner fuel and mitigate adverse effects However, reactions involved in this process sluggish. order enhance reaction rate, scientists have been exploring catalysts with long-term durability stability ability facilitate kinetics oxygen evolution (OER) hydrogen (HER). Furthermore, due instability, high cost, scarcity noble-metal-based catalysts, shifted their focus nanoporous-based metal–organic framework (MOF) covalent organic (COF) which not only offer enhanced but also contribute conductivity, crucial factor for materials used water-splitting processes. Certain MOFs found surpass platinum- iridium-based catalysis. COFs OER HER large surface area, porosity, excellent electrical establishing them valuable electrocatalysts diverse applications. This Review provides comprehensive investigation based COFs, encompassing classification synthetic pathways, special emphasis HER/OER performance. It delves into intricate aspects structure–property correlations nanostructure engineering, offering understanding these context electrocatalysis. Moreover, some exhibit notable efficiency while others demonstrate proficiency HER, showcases versatile electrocatalytic capabilities. Additionally, sheds light future challenges confronting engages discourse potential solutions.

Language: Английский

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Pt and Mo2C nanoparticles embedded in hollow carbon nanofibers as an effective electrocatalyst for hydrogen evolution reaction in acidic and alkaline electrolytes

Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: 1005, P. 176019 - 176019

Published: Aug. 13, 2024

Language: Английский

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Phase Transition Engineering of Metal–Organic Frameworks Induces Multiphase Complexation for Enhancing the Oxygen Evolution Reaction

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Phase transition engineering of metal–organic frameworks (MOFs) presents a promising strategy for enhancing electrocatalytic performance in water splitting applications. In this study, we demonstrate controlled phase to synthesize multiphase composite (op&cp) composed open (op) and closed (cp) through precise desolvation treatment. When used as an alkaline electrocatalyst, op&cp exhibits exceptional oxygen evolution reaction (OER) performance, achieving remarkably low overpotential 140 mV under 10 mA cm–2 maintaining stable operation over 75 h at 100 cm–2. situ Raman spectroscopy X-ray photoelectron show that the catalytically active substance NiOOH is formed on engineered with lower potential (1.2 V vs RHE) than single-phase material (1.3 RHE). This work establishes viable improving MOF-based catalysis explores fundamental mechanism dynamic sites during OER.

Language: Английский

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NH4F-induced morphology-dependent NiSe2/CoSe electrocatalysts on Ni foam for enhanced overall water splitting

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 693, P. 137642 - 137642

Published: April 18, 2025

Language: Английский

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