Small, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 18, 2024
The use of efficient and affordable non-precious metal catalysts for hydrogen oxygen evolution reactions is vital replacing widely implementing new energy sources. Nevertheless, improving the catalytic performance these non-precious-metal bifunctional electrocatalysts continues to be a major challenge. In this article, an optimized Se-incorporated bulk CoS
Language: Английский
Advanced Composites and Hybrid Materials, Journal Year: 2025, Volume and Issue: 8(1)
Published: Jan. 14, 2025
The performance of polycrystalline diamond (PCD) tools largely depends on the adhesion and catalyzing effect binder phase. In this study, AlCoCrFeNi2.1 eutectic high-entropy alloy (HEA) was used as a new material to synthesize PCD samples. First-principles calculations showed that interface strength between HEA is better than cobalt diamond, suggesting HEA/PCD combination has potential exhibit properties conventional cobalt/PCD tools. samples with phase were successfully synthesized using high-pressure high-temperature conditions 8.0 GPa 1500–1700℃. Several key indicators, including thermal expansion coefficient, Vickers hardness, transverse rupture strength, compressive wear resistance measured comprehensively evaluate overall well-sintered HEA/PCD. results that, compared cobalt/PCD, exhibited lower coefficient reduced graphitization at high temperatures above 920 K. also demonstrated mechanical Co/PCD, higher greater strength. Moreover, over same cutting distance against granite block, significantly loss indicating superior resistance. This study provides insights strategies for design optimization binders
Language: Английский
Citations
1
ACS Applied Energy Materials, Journal Year: 2024, Volume and Issue: 7(20), P. 9121 - 9133
Published: Oct. 8, 2024
The preparation of clean and sustainable renewable energy requires the development bifunctional electrocatalysts with high stability activity for oxygen evolution reaction (OER) hydrogen (HER). Doping Ga in catalyst can enhance catalytic reaction. In this study, we added different amounts to FeCoNiCuTi HEAs make (FeCoNiCuTi)100–xGax (x = 1, 2, 3, 5, 10, 16.67) a cost-effective HER/OER electrocatalyst that showed excellent electrocatalytic alkaline electrolyte. At current density 10 mA/cm2, it has an overpotential 47 mV, Tafel slope 35.75 mV/dec, electric double-layer capacitance 36.8 mF/cm2, which performance HER same density, OER is 345.56 33.9 31.24 comparable overcapacitance inert catalyst. This makes highly efficient integral water splitting. Density functional theory (DFT) calculations have shown chemical complexity provides strong synergistic effect changing electronic structure. work focuses on possibility adding elements high-entropy alloys HER/OER.
Language: Английский
Citations
7
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: 1011, P. 178435 - 178435
Published: Jan. 1, 2025
Language: Английский
Citations
0
ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(1)
Published: Jan. 1, 2025
Abstract This work highlights the novelty of investigating hydrogen production from hydrazine borane (HB) using copper (Cu). first‐row transition metal is abundant yet underexplored as a catalyst compared to precious metals. We focus on The synthesis Cu nanoparticles supported MIL‐53(Al) (Cu/MIL‐53(Al)) through an impregnation‐reduction method and evaluate their performance in HB hydrolysis. Advanced characterization techniques, including X‐ray diffraction (XRD), photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), TEM‐energy‐dispersive (TEM‐EDX), reveal average nanoparticle size 3.94 ± 0.32 nm. Notably, turnover frequency (TOF) for with Cu/MIL‐53(Al) at 298 K was 966 h⁻¹ (16.1 min⁻¹), representing highest TOF reported Cu‐based systems Furthermore, we calculated activation energy (Ea # ), enthalpy (ΔH entropy (ΔS ) 83.77 kJ mol⁻¹, 81.15 48.56 J mol⁻¹ K⁻¹, respectively, Arrhenius Eyring‐Polanyi equations. These findings underscore potential efficient cost‐effective production, significantly advancing sustainable technologies.
Language: Английский
Citations
0
Applied and Computational Engineering, Journal Year: 2025, Volume and Issue: 129(1), P. 123 - 130
Published: Jan. 15, 2025
High-entropy alloys (HEAs), due to their exceptional mechanical properties, thermal stability, and corrosion resistance, have garnered significant attention in the field of materials science. This paper reviews primary preparation methods HEAs, such as carbothermal shock, electrochemical synthesis, spark plasma sintering, analyzes characteristics these terms compositional control synthesis efficiency. Through various characterization techniques, researchers can gain an in-depth understanding microstructure elemental distribution thereby enhancing performance applications catalysis. Although substantial progress has been made HEA research, challenges phase separation equipment costs continue hinder large-scale industrial applications. Future studies should focus on improving controllability environmental sustainability processes advance widespread application HEAs energy, catalysis, electronics.
Language: Английский
Citations
0
Materials Letters, Journal Year: 2025, Volume and Issue: unknown, P. 138239 - 138239
Published: Feb. 1, 2025
Language: Английский
Citations
0
Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 179255 - 179255
Published: Feb. 1, 2025
Language: Английский
Citations
0
International Journal of Minerals Metallurgy and Materials, Journal Year: 2025, Volume and Issue: 32(4), P. 757 - 777
Published: March 26, 2025
Language: Английский
Citations
0
Materials Today Communications, Journal Year: 2025, Volume and Issue: unknown, P. 112365 - 112365
Published: March 1, 2025
Language: Английский
Citations
0
Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 213 - 265
Published: Jan. 1, 2025
Language: Английский
Citations
0