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Bulunan: 208 Adet 0.018 sn
Koleksiyon : Mühendislik ve Doğa ... ✕Koleksiyon : Fakülteler ✕
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FakültelerGaziantep İslam Bilim ve Teknoloji Üniversitesi Kurum Koleksiyonu

The Ni-deposited carbon felt as substrate for preparation of Pt-modified electrocatalysts: Application for alkaline water electrolysis

Ali Döner

A Ni-modified carbon felt (C) electrode (C/Ni) was used as a substrate for preparation of Ptmodified electrode in view of its possible application as electrocatalytic material for the hydrogen evolution activity. The prepared electrode was characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and cyclic voltammetry (CV) techniques. The hydrogen evolution activity of the electrode was assessed by cathodic currentepotential curves and electrochemical impedance spectroscopy (EIS) techniques. It was found that the modification of Ni-deposited C by loading ...Daha fazlası

Makale 2012 International Journal of Hydrogen Energy37 ( 11 ) , pp. 8 - 8922 4 Görüntülenme Süresiz Ambargo

Electrocatalytic behavior of the Pd-modified electrocatalyst for hydrogen evolution

Ali Döner

The hydrogen evolution behavior of C/CoSn, C/CoSnZn and C/CoSnZnePd catalysts which were prepared on a graphite substrate (C) by electrochemical deposition, as well as their electrochemical properties in the KOH solutions, have been investigated by the polarization measurements, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and electrolysis techniques. C/CoSnZn catalyst was etched in caustic to leach out zinc and to produce the Raney-type, porous electrocatalytic surface for hydrogen evolution. In order to further improve the catalytic activity of the C/CoSnZn catalyst for t ...Daha fazlası

Makale 2013 International Journal of Hydrogen Energy38 ( 10 ) , pp. 3 - 3888 2 Görüntülenme Süresiz Ambargo

NiMn composite electrodes as cathode material for hydrogen evolution reaction in alkaline solution

Ali Döner

NiMn composite catalysts (C/NiMn, C/NiMnZn, C/NiMnZnePtRu and C/NiMnZnePtPd) have been prepared on the graphite substrate (C) by electrochemical deposition as electrocatalytic materials for hydrogen evolution reaction (HER). The NiMnZn coatings were etched in a concentrated alkaline solution (30% NaOH) to produce a porous and electrocatalytic surface suitable for the HER. After the leaching process, a low amount of binary PtPd and PtRu were deposited onto the etched NiMnZn deposit in order to improve the catalytic activity for the HER. Surface morphology and composition of the catalysts were a ...Daha fazlası

Makale 2013 International Journal of Hydrogen Energy38 ( 11 ) , pp. 4 - 4473 2 Görüntülenme Süresiz Ambargo

Electrocatalytic oxidation of methanol on Ru deposited NiZn catalyst at graphite in alkaline medium

Ali Döner

tThe methanol oxidation on C/NiZn-Ru electrode in a 1.00 M KOH and 1.00 M KOH + 1.00 M methanolsolutions at different scan rates and temperatures was studied by the cyclic voltammetry (CV), electro-chemical impedance spectroscopy (EIS) and chronoamperometry (CA) techniques. The graphite electrodeis coated in a nickel–zinc bath by electrodeposition for use as anode materials for methanol oxidationin alkaline solutions. It is etched in a concentrated alkaline solution to produce a porous and electrocat-alytic surface suitable for use in the methanol oxidation (C/NiZn). Ruthenium was electrodepos ...Daha fazlası

Makale 2013 Electrochimica Acta107 , pp. 2 - 224 3 Görüntülenme Süresiz Ambargo

Inhibition Effect of Rhodanine-N-Acetic Acid on Copper Corrosion in Acidic Media

Ali Döner

The inhibition effect of Rhodanine-N-acetic acid (R-NA) on copper corrosion in acidic media is studied by using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), and linear polarization resistance (LPR). The surface morphology is investigated by using scanning electron microscopy (SEM). The exposure of copper surface to 0.5 M H2SO4 solution in short and long immersion times in the absence and presence of the inhibitor is also examined. The results show that R-NA is a powerful inhibitor for copper corrosion in acidic media due to its strong adsorption onto the metal su ...Daha fazlası

Makale 2013 Industrial & Engineering Chemistry Research52 ( 29 ) , pp. 9 - 9718 1 Görüntülenme Süresiz Ambargo

Experimental studies of 2-pyridinecarbonitrile as corrosion inhibitor for mild steel in hydrochloric acid solution

Ali Döner

The effect of 2-Pyridinecarbonitrile (2-PCN) was studied on mild steel (MS) corrosion in 0.1 mol L1 HCl by electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR) and potentiodynamic polarization measurements. The surface morphologies of the MS were investigated in the inhibitor- free and in the presence of 10 mmol L1 2-PCN containing corrosive media, at 120 h exposure period by scanning electron microscopy (SEM). The mechanism of adsorption was determined from the potential of zero charge (Epzc). 2-PCN adsorption on the MS surface obeyed the isotherm of Langmuir a ...Daha fazlası

Makale 2014 Corrosion Science82 , pp. 1 - 132 7 Görüntülenme Süresiz Ambargo

Hydrogen evolution stability of platinum modified graphite electrode

Ali Döner

A Platinum-modified alloy coating with high hydrogen evolution reaction (HER) durability activity was prepared by electrodeposition. The durability of this catalyst was determined with electrolysis technique for 120 h. The prepared electrode was characterized by energy dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM) and scanning electron microscopy (SEM). Long-term electrolysis was carried out in 1 M KOH solution by cathodic currentepotential curves and electrochemical impedance spectroscopy (EIS). Experimental result showed that CoZnePt coating has a rough structure and pre ...Daha fazlası

Makale 2014 International Journal of Hydrogen Energy39 ( 22 ) , pp. 1 - 11359 0 Görüntülenme Süresiz Ambargo

A novel, effective and low cost electrocatalyst for direct methanol fuel cells applications

Ali Döner

Electrocatalytic oxidation of methanol in alkaline solution on a NiCd/C catalyst chemically modified by a leaching process of Zn was investigated. Scanning electron microscopy (SEM), X-ray florescence spectroscopy (XRF) and atomic force microscopy (AFM) were used for coating characterization. The electrochemical properties and behaviors and also kinetic values of alkaline leached NiCdZn/C catalyst were characterized using cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS). The electrocatalytic activity of the alkaline leached NiCdZn/C catalyst towa ...Daha fazlası

Makale 2015 International Journal of Hydrogen Energy40 ( 14 ) , pp. 4 - 4849 1 Görüntülenme Süresiz Ambargo

Enhancement of electrochemical activity of Raney-type NiZn coatings by modifying with PtRu binary deposits: Application for alkaline water electrolysis

Ali Döner

This study presents electrochemical preparation and characterization of PtRu-modified Cu/ Ni/NiZn electrodes (Cu/Ni/NiZnePtRu) as cathode materials for alkaline water electrolysis. The electrodes were characterized using energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. Their electrochemical activities as cathode materials for alkaline water electrolysis were evaluated with the help of currentepotential curves. The results showed that the PtRu-modified layers have porous structures with relatively low Pt and Ru chemical compo ...Daha fazlası

Makale 2016 International Journal of Hydrogen Energy41 ( 3 ) , pp. 1 - 1440 2 Görüntülenme Süresiz Ambargo

Hydrogen evolution on Pd modified CoCuZn and CoMnZn cathodes

Ali Döner

Hydrogen evolution reaction (HER) was studied on four types of alkaline leached cathodes (CoCuZn/C, CoCuZnePd/C, CoMnZn/C and CoMnZnePd/C) in 1 M KOH solution at 25 C. Electrochemical characterization of these four cathodes was performed by energydispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM) and cyclic voltammetry (CV) methods. Their electrochemical activities have been examined by using current-potential curves, electrochemical impedance spectroscopy (EIS) and chronoamperometry (CA) methods. The results of the study exhibited that the catalytic activities of the cat ...Daha fazlası

Makale 2018 International Journal of Hydrogen Energy43 ( 51 ) , pp. 2 - 22806 3 Görüntülenme Süresiz Ambargo

Hydrogen evolution behavior of nickel coated TiO2

Ali Döner

Nickel modified titanium dioxide nanotubes (TiO2-NTs/Ni) and TiO2-NTs electrodes are investigated for hydrogen evolution reaction (HER). To obtain large surface area, TiO2-NTs are prepared by using anodization method at a constant voltage of 60 V for various anodization times (30 min, 1 h and 2 h). Small amount of Ni is successfully deposited over TiO2-NTs via electrodeposition method. Hydrogen evolution activities of TiO2-NTs/Ni and TiO2-NTs are investigated in 1 M KOH solution at room temperature. Characterizations of prepared nanostructured electrodes are analyzed with scanning electron mic ...Daha fazlası

Makale 2020 International Journal of Hydrogen Energy45 ( 60 ) , pp. 3 - 34887 4 Görüntülenme Süresiz Ambargo

Electrocatalysis property of CuZn electrode with Pt and Ru decoration

Ali Döner

Electrocatalysis properties strongly depend on the interaction of metallic particles and this interaction enables to change the electronic structure of alloys which enhances the catalytic activity. This property is the key factor in the developing of cost-effective and efficient Hydrogen Evolution Reaction (HER) electrocatalysts for sustainable hydrogen production. In this study, novel electrocatalysts which are decorated with Pt and Ru have been developed for HER electrocatalysis. Microscopic analysis such as scanning electron microscopy (SEM), energy dispersive X-ray (EDX), X-ray diffraction ...Daha fazlası

Makale 2021 International Journal of Hydrogen Energy46 ( 43 ) , pp. 2 - 22421 6 Görüntülenme Süresiz Ambargo