Yazar "Caglayan, Mustafa Oguzhan" seçeneğine göre listele

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    Catalytic activity of Fe@Ag nanoParticle involved calcium alginate beads for the reduction of nitroPhenols
    (Elsevier, 2014) Gupta, Vinod Kumar; Yola, Mehmet Lutfi; Eren, Tanju; Kartal, Fatma; Caglayan, Mustafa Oguzhan; Atar, Necip
    A novel highly efficient and recyclable catalyst based on Fe@Ag bimetallic nanoParticles involved parninothiophenol (ATP) functionalized calcium alginate (Fe@Ag-ATP-CA) beads was prepared and characterized by transmission electron microscope (TEM), and x-ray photoelectron spectroscopy (XPS). The catalytic properties of 4-nitrophenol (4-NP) and 2-nitrophenol (2-NP) were performed using Fe@Ag-ATP-CA catalyst synthesized in the presence of sodium borohydride (NaBH4). The effects of various variables such as the catalyst dosage, the concentration of sodium borohydride, and temperature were also investigated. The rates of catalytic reduction of 4-NP and 2-NP compounds have been found as the sequence: 4-NP > 2-NP. The kinetic models and the thermodynamic parameters were studied to show the reduction mechanisms. The Fe@Ag-ATP-CA catalyst has highly efficient recyclability and excellent catalytic activity. (C) 2013 Elsevier B.V. All rights reserved.
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    Silver, gold, and silver@gold nanoparticle-anchored l-cysteine-functionalized reduced graphene oxide as electrocatalyst for methanol oxidation
    (Springer Heidelberg, 2015) Atar, Necip; Eren, Tanju; Demirdogen, Bermali; Yola, Mehmet Lutfi; Caglayan, Mustafa Oguzhan
    Fuel cells have been attracting more and more attention in recent decades due to high-energy demands, fossil fuel depletions, and environmental pollution throughout world. In this study, we report the synthesis of metallic and bimetallic nanoparticle (AgNP, AuNP, and Ag@AuNP)-involved l-cysteine-functionalized reduced graphene oxide nanocomposite (AgNPs/cis/rGO, AuNPs/cis/rGO, and Ag@Au/cis/rGO) and their applications as an electrocatalyst for methanol electro-oxidation. The nanocomposites were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). Experimental results demonstrated that the prepared nanocomposites enhanced electrochemical efficiency for methanol electro-oxidation with regard to diffusion efficiency, oxidation potential, and forward oxidation peak current.