Browsing by Author "Doner, Ali"

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Citation - WoS: 10
Citation - Scopus: 10
A Comprehensive Analysis Of Arum Dioscoridis Plant Leaf Extract as a Corrosion Inhibitor for Mild Steel in 1 M Hcl: Synthesis, Characterization, Surface Analysis Observations, Experimental and Dft Studies
(Elsevier, 2025) Doner, Ali; Yildiz, Resit; Arslanhan, Selim; Baran, Mehmet Firat; Yıldız, Reşit; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Baran, Mehmet Fırat; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
Background: Corrosion occurs wherever metal and its alloys exist. Protection of metals with corrosion inhibitor is a popular topic. Considering environmental concerns and human health, it is more favorable to use green corrosion inhibitors than traditional corrosion inhibitors. Methanol extract of Arum dioscoridis (AD) becomes a potential green corrosion inhibitor and it can be used in industrial areas. Methods: Corrosion efficiency, corrosion behavior and corrosion mechanism of Arum dioscoridis leaf extract on mild steel (MS) are illuminated in 1 M HCl by Tafel curves, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), zero charge potential, structural and surface morphological analysis and density functional theory (DFT). Significant findings: The extract function as mixed-type corrosion inhibitor with predominantly cathodic action. Inhibition efficiency was reached the value of 97 %. Polarization resistance is measured as 761 Omega cm2 at 1000 ppm of AD. The high inhibition efficiency was attributed to phytochemicals in the AD extract. A high activation energy (70.34 kJ/mol) for inhibited solution than that of in blank solution (49.66 kJ/mol). Both physisorption and chemisorption are responsible for formation of a protective layer on MS surface to inhibit the electrochemical reactions. Optimized molecular structures in phytochemicals confirmed the inhibitive properties via DFT.
Citation - WoS: 1
Citation - Scopus: 1
Electrochemical Behavior of Pt Nano-Particles Dispersed on Cu/Ni Electrode in Alkaline Environment
(Pergamon-elsevier Science Ltd, 2024) Toprak Döşlü, Serap; Doner, Ali; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
The development of a low-cost Pt-based electrocatalyst for industrial water splitting is important. In this study, to prepare cost-efficient Pt-based electrocatalyst for hydrogen evolution, Cu electrode is deposited with nickel (Cu/ Ni) and this surface is modified with Pt nanoparticles by electrodeposition method (Cu/Ni-Pt). The surface properties of the produced electrocatalysts are studied via X-ray diffraction (XRD), scanning electron spectroscopy (SEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM) and atomic force microscopy (AFM). Characterizations demonstrated that the coating is homogeneous and compact. Hydrogen evolution and corrosion behaviors of prepared electrode (Cu/Ni-Pt) are examined in 1.0 M KOH solution using cyclic voltammetry (CV) and cathodic and anodic current-potential curves, electrochemical impedance spectroscopy (EIS). Tafel slope is determined to be 133 mV dec(-1) on Cu/Ni-Pt. Very high exchange current density (5.65 mA cm(-2)) and very low charge transfer resistance (0.91 Omega cm(2) at 1.05 V vs RHE) are measured again on this electrocatalyst. High activity is due to intrinsic activity of Pt and synergistic interaction of Pt and Ni. Besides, Cu/Ni-Pt exhibits so stable structure over 4 h without any current densities decay as well as showing good corrosion performance after long-term immersion times and these properties make it possible electrocatalyst with high corrosion resistant and activity in the water electrolysis systems.
Citation - WoS: 0
Citation - Scopus: 0
Thorough Examination of Polygonum Aviculare L. Plant Leaf Extract as a Green Corrosion Inhibitor for Mild Steel in 1m Hcl: Synthesis, Characterization, Observations From Surface Analysis, Experimental and Dft Studies
(Elsevier, 2025) Baran, Mehmet Fırat; Yildiz, Resit; Doner, Ali; Baran, Mehmet Firat; Department of Medical Services and Techniques / Tıbbi Hizmetler ve Teknikleri Bölümü
Some industrial applications such as oil well acidification, steel pickling, acid descaling and chemical cleaning are carried out in acid environments. During these processes, corrosion of steel is inevitable. This study focuses on the extraction and corrosion behavior of Polygonum aviculare L. (PA) leaf extract as a novel corrosion inhibitor and developing a highly effective, eco-system friendly corrosion inhibitor for mild steel (MS). Corrosion behavior and mechanism of PA leaf extract are revealed on MS in 1 M HCl by Tafel curves, electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), zero charge potential, structural and surface analysis and density functional theory (DFT). According to findings, FT-IR results reflected some groups such as -OH, -CH, C-O, C=C, C=O and ether. LC-ESI-MS/MS detected the phenolic acids, flavonoids, phytosteroids and phenolic aldehyde characterized as phytochemicals. PDP, EIS and LPR underscored that corrosion current densities decreased to 0.06 mA cm-2, polarization resistances increased to 457 ohm cm2 and inhibition efficiency increased to 96 %. In the comparison of the inhibition efficiency with the literature, PA extract exhibited outstanding corrosion inhibition efficiency (96 %). The adsorption property of PA extract matched the Langmuir process. PA extract showed an adsorption layer even at high temperatures. This behavior is confirmed by a high value of Ea (53.04 kJ/mol). Almost smooth, more compact, and homogenous surfaces were revealed by SEM. Molecules of phytochemicals in PA extract showed both physical and chemical adsorption. These interactions reduced the MS deterioration from corrosion. According to quantum chemical calculation, chlorogenic acid had the highest corrosion inhibitor efficiency among the other phytochemicals. The findings obtained from this study have the potential to contribute to the advancement of sustainable corrosion protection strategies and can provide basic guidance for industrial applications.