February 2025
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4 Reads
Journal of Alloys and Compounds
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February 2025
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4 Reads
Journal of Alloys and Compounds
February 2025
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3 Reads
Surface and Coatings Technology
January 2025
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7 Reads
Seawater electrolysis is an ideal technology for obtaining clean energy—green hydrogen. Developing efficient bifunctional catalysts is crucial for hydrogen production through direct seawater electrolysis. Currently, metal substrates loaded with active catalysts are widely employed as electrodes for seawater electrolysis. However, the challenge of metal corrosion cannot be ignored. In this work, the boron-doped diamond (BDD) with excellent corrosion resistance was explored as a substrate for loading active catalysts in seawater electrolysis. A step-by-step electrodeposition method was used to fabricate the FeCoS/Ni/BDD electrode, effectively addressing the poor adhesion of the FeCoS active layer to the BDD substrate. The resulting electrode demonstrated interesting bifunctional catalytic performance, achieving oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) overpotentials of 425 mV and 360 mV, respectively, in alkaline simulated seawater (1 M KOH and 3.5 wt% NaCl) at a current density of 100 mA cm− 2. Furthermore, by increasing the KOH concentration in the alkaline simulated seawater to 3 M, the OER and HER overpotentials of the electrode significantly decreased to 383 and 300 mV, respectively. This work offers a novel approach for utilizing BDD substrates in the design of corrosion-resistant electrodes for alkaline seawater electrolysis.
January 2025
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1 Read
International Journal of Hydrogen Energy
December 2024
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2 Reads
Ceramics International
December 2024
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1 Read
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1 Citation
Progress in Organic Coatings
December 2024
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7 Reads
Ceramics International
November 2024
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6 Reads
Applied Surface Science
October 2024
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32 Reads
Materials
Dense lithium hydride (LiH) is widely used in neutron shielding applications for thermonuclear reactors and space systems due to its unique properties. However, traditional sintering methods often lead to cracking in LiH products. This study investigates the densification sintering of LiH using microwave technology. A multiphysics model was established based on the measured dielectric properties of LiH at different temperatures, allowing for a detailed analysis of the electromagnetic and thermal field distributions during the microwave heating of cylindrical LiH samples. The results indicate that the electric field distribution within the LiH is relatively uniform, with resistive losses concentrated primarily in the LiH region of the microwave cavity. LiH rapidly absorbs microwave energy, reaching the sintering temperature of 520 °C in just 415 s. Additionally, the temperature difference between the low- and high-temperature regions during the sintering process remains below 5 °C, demonstrating excellent uniform heating characteristics. The microwave sintering process enhances interface migration within the LiH samples, resulting in dense metallurgical bonding between grains. In summary, this research provides valuable insights and theoretical support for the rapid densification of LiH materials, highlighting the potential of microwave technology in improving material properties.
October 2024
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3 Reads
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1 Citation
International Journal of Hydrogen Energy
... At standard conditions (298 This approximation, which incorporates both zero-point energy and entropy corrections, is widely adopted and validated by several studies. 52,[57][58][59] Consequently, ∆H H * ads = −0.25 eV, corresponding to ∆G H * = 0 eV has been widely accepted as the condition for the ideal HER catalyst surface. This value is highlighted by the gray dotted lines in several plots presented in this study. ...
July 2024
Separation and Purification Technology
... However, there are still many unclear aspects in the existing research. It was found that increasing the casting and pulling speed did not significantly improve the chemical composition homogenization of large-scale slab ingots [32]. The main reason is that increasing the pulling speed will significantly increase the depth of the melt pit at the overflow inlet, limit the diffusion of the melt body outward, and easily cause leakage, affecting the solidification microstructure quality of the ingot. ...
June 2024
Minerals
... The researchers attributed the improved performance to factors such as high surface area, the presence of numerous defects, and nickel vacancies. Zhengxin Zhang et al. [34] reported the fabrication of pure and Gd-doped In2O3 nanoparticles using a hydrothermal method, followed by heat treatment at 180 °C for 12 h. The synthesized nanoparticles were investigated for xylene sensing applications in the presence of dry air at various operating temperatures and concentrations of target xylene vapors. ...
March 2024
Journal of Porous Materials
... Materials with high permittivity, such as wet ores, can concentrate electric fields, thereby influencing the leaching process. This principle is central to the application of microwave technology in mineral processing, as discussed in the paper by Chen [57]. The paper emphasizes the importance of dielectric properties in microwave heating, where materials with high relative permittivity absorb microwave energy more efficiently, leading to rapid and uniform heating. ...
February 2024
Minerals
... Polyacrylonitrile-based carbon fibers occupy a premier position in the field of advanced composites due to their combination of remarkable mechanical properties, such as high specific strength and modulus, low density, and corrosion resistance, which offer unrivaled advantages over other materials [10][11][12][13]. Generally, the conversion of PAN-based precursors into carbon fibers involves oxidative stabilization in an air atmosphere and carbonization in an inert atmosphere [12,[14][15][16][17], in which the thermal oxidative stabilization process, as an organic-inorganic transition stage, plays an important role in determining the mechanical properties and microstructure of the final carbon fibers. ...
January 2024
Diamond and Related Materials
... Low-dimensional nanomaterials for EM function contain different dimensions (zero-dimensional (0D), quasi-onedimensional (Q1D), one-dimensional (1D), and two-dimensional (2D) nanofillers) [17][18][19]. The ingenious combination of these different dimensions known as heterodimensional structures will exhibit novel physical properties (containing nanostructure, conductive network distribution, EM response, etc.) beyond those of the parent material at the nano/micro/macroscale [20]. ...
September 2023
... 6,7 The electrode material used in SCs has a significant impact on their performance, influencing characteristics such as charge storage capacity and conductivity. 8 Indicating that the right electrode materials are critical for collecting and discharging electrical energy with maximum efficiency and dependability. The selection of the appropriate materials is critical for improving overall SC performance in a variety of applications. ...
August 2023
Materials Today Communications
... Table 3 provides all the curing-related material properties along with their range and step in the design space. In this study, according to Equation (2), the autocatalytic cure kinetic equation is used, as it is widely used in cure prediction studies [23,25,44,45]: ...
June 2023
... It is confirmed that the MoS2/Pt surface lowers the activation energy to convert CO to CO2 via the free radicals (·O 2and · OH) induced by the synergy of photochemical effects and water vapor. 96 ...
June 2023
... Transition metals such as Ni, Fe, and Co can also serve as active metals in plastic pyrolysis. [31] This study investigated the influence of different metals on microwave-assisted catalytic pyrolysis. FeO x was selected as the base material owing to its superior performance as a monometallic catalyst. ...
May 2023
Fuel