Yazar "Keskin, M. Salih" seçeneğine göre listele

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    Development of Al2O3-supported nanobimetallic Co-La-B catalyst for boosting hydrogen release via sodium borohydride hydrolysis
    (Springer, 2024) Keskin, M. Salih; Horoz, Sabit; Sahin, Omer; Kutluay, Sinan
    This study introduces the novel Al2O3-supported nanobimetallic Co-La-B (Al2O3@Co-La-B) catalyst, specifically designed to enhance hydrogen production via sodium borohydride hydrolysis, marking its first application in hydrogen generation. Characterized by X-ray diffraction, Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, Brunauer-Emmett-Teller analysis, and scanning electron microscopy, the catalyst exhibits a porous, homogeneous cubic structure which significantly contributes to its high catalytic efficiency. It demonstrated remarkable hydrogen generation rates of up to 6057.72 mL(H2) min(-1) g(cat)(-1) at 30 degrees C and maintained 91.63% catalytic activity over multiple cycles, with a notable increase to 8661.94 mL(H2) min(-1) g(cat)(-1) at 60 degrees C. Kinetic studies, utilizing nth-order and Langmuir-Hinshelwood models, indicated activation energies of 51.38 kJ mol(-1) and 49.33 kJ mol(-1), respectively, showcasing the catalyst's potential as a sustainable solution for hydrogen production in various industrial applications.
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    Öğe
    Efficiency of TiO2-supported Ni-Mo-Ru-B catalyst for hydrogen production from potassium borohydride hydrolysis
    (Springer, 2022) Keskin, M. Salih; Sahin, Omer; Horoz, Sabit
    In this study, TiO2-supported Ni-Mo-Ru-B (TiO2@Ni-Mo-Ru-B) catalyst was synthesized by chemical reduction method for hydrogen production from the hydrolysis of potassium borohydride (KBH4) solution. The characterizations of the synthesized catalysts were carried out with BET, XRD, and SEM. In hydrolysis experiments, the effects of parameters such as KOH concentration, KBH4 concentration, catalyst amount, metal/TiO2 ratio, and temperature on hydrogen production rate were investigated. The optimum metal/TiO2 ratio was determined as 10% and the hydrogen production rate of the catalyst at 30 degrees C was calculated as 2410.28 mL/min.g(cat). In addition, the reaction rate order was found to be 0.8 (nth order); accordingly, the value of the activation energy was obtained from the Arrhenius equation as 51.807 kJ/mol.
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    Öğe
    High hydrogen production rate from potassium borohydride hydrolysis with an efficient catalyst: CNT@Ru(0)
    (Desalination Publ, 2022) Keskin, M. Salih; Agirtas, Mehmet Salih; Baytar, Orhan; Izgi, M. Sait; Sahin, Omer; Horoz, Sabit
    We describe the production and catalytic activity of a carbon nanotube supported-Ru(0) (CNT@Ru(0)) catalyst. For the first time, the produced CNT@Ru(0) catalyst is used to achieve the greatest hydrogen production rate from potassium borohydride (KBH4) hydrolysis. The produced CNT@ Ru(0) catalyst shows promise in the creation of hydrogen from the degradation of KBH4. The hydrogen generation rate of CNT@Ru(0) is determined to be 86,264.85 mL min(-1) can with a low activation energy of 30.18 kJ mol(-1). CNTs are potential support for distributing metal catalysts, according to the current work. Furthermore, structural, morphological, and elemental characteristics of the produced CNT@Ru(0) catalyst are investigated.