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    Electrospinning‐Derived FeCrNiZrMn High‐Entropy Alloy on Carbon Nanofibers for Hydrogen Evolution
    (Wiley, 2026-01-31)
    Yezeng He
    ;
    Rongrong Tan
    ;
    Lingfeng Li
    ;
    Reza Behmadi
    ;
    Siyi Sun
    Due to increasing demand for sustainable energy systems, hydrogen energy, as a green and low-carbon energy carrier, has considerable potential for development. The electrocatalytic water splitting is one of the key ways to produce green hydrogen, but high costs and resource limitations of Pt-based catalysts limit their large-scale use. As a result, exploring high-performance, low-cost non-noble metal HER catalysts have emerged as a research focus. This work has been focused on the investigation of FeCrNiZrMn/CNFs high-entropy alloy catalysts. A series of catalyst materials were prepared through electrospinning techniques with subsequent high-temperature carbonization at 700°C–900°C. The experimental results showed that the FeCrNiZrMn/CNFs synthesized at 800°C could form uniformly distributed and crystallographically stable high-entropy alloy nanoparticles, achieving exceptional performance for the HER under alkaline conditions, with an overpotential of 57 mV at 10 mA/cm2 and a Tafel slope of 29.2 mV/dec, and maintaining 99.3% voltage stability during a 16-h constant current test. Theoretical results from DFT suggested that the high-entropy alloy surface has diverse hydrogen adsorption sites and a tunable electronic structure. The differential charge density analysis furthers interpretation of the electron transfer behavior during hydrogen adsorption, and reveals the intrinsic mechanism of its efficient catalysis. © 2026 Wiley-VCH GmbH.
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    Controllable synthesis of nanostructured flower-like cadmium sulfides for photocatalytic degradation of methyl orange under different light sources
    (Elsevier BV, 2024-03)
    Akbar Hojjati-Najafabadi
    ;
    Elahe Farahbakhsh
    ;
    Golnaz Gholamalian
    ;
    Peizhong Feng
    ;
    Fatemeh Davar
    This study focuses on the synthesis and characterization of cadmium sulfide nanostructures by coprecipitation method. The materials are characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and Raman spectroscopy. The bandgap of the nanostructures was calculated under different conditions ranged between 2.8 and 2.4 eV and the materials have flower-like morphology in a cubic crystal system. Photocatalytic degradation of methyl orange dye was investigated under different radiation sources (sunlight, ultraviolet light, xenon light, and sunlight simulator). The effect of pH, initial dye concentration, and photocatalyst concentration on dye degradation was examined to show good degradation performance upon exposure to sunlight, UV light and visible light radiation. The results showed that by reducing the pH, degradation was improved, showing good performance at pH 3 with 85 % within 90 min. In addition, the optimal conditions for dye degradation were observed at concentration of 10 mg, methyl orange dye initial concentration of 10 g/L, and pH of 3. A 100 % degradation of methyl orange dye occurred in 90 min of visible light radiation, suggesting the potentiality of cadmium sulfide nanostructures under the effect of UV irradiation for cleaner production and complete elimination of the dye from polluted water sources, thus contributing to environmental enhancement.