Toprak Döşlü, Serap
Loading...
Name Variants
Doslu, Serap Toprak
Toprak, Serap
Toprak, Serap
Job Title
Doktor Öğretim Üyesi
Email Address
seraptoprak@artuklu.edu.tr
Main Affiliation
Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü
Status
Website
ORCID ID
Scopus Author ID
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
Sustainable Development Goals Report Points
SDG data could not be loaded because of an error. Please refresh the page or try again later.
Scholarly Output
20
Articles
11
Citation Count
105
Supervised Theses
0
20 results
Scholarly Output Search Results
Now showing 1 - 10 of 20
Article Investigation of the hydrogen evolution on Ni deposited titanium oxide nano tubes(Corrosion Science, 2012) Toprak Döşlü, Serap; Doğru Mert, Başak; Toprak Döşlü, Serap; Kardaş, Gülfeza; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Nursing / Hemşirelik BölümüTitanium oxide nano tubes (TiOx) were prepared by the electrochemical anodizing method from at different process time and different potential in 0.1 M HF solution. Their morphologies were determined with surface photographs and scanning electron microscopy (SEM) images. Ni nano particles were deposited in conductive TiOx nano tubes arrays via pulsed electrodeposition method. Their catalytic activity towards the hydrogen evolution reaction (HER) was assessed by recording cyclic voltammetry technique, cathodic currentepotential curves, hydrogen gas volumes and electrochemical impedance spectroscopy techniques. The highest HER activity thought the studied is observed on the TiOx(30)-Ni.Conference Object Electrochemical Behavior of Single Pt atoms dispersed on Cu/Ni Electrode in Alkaline Environment(2023) Toprak Döşlü, Serap; Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüIt is important the development of cost-effective Pt based electrocatalyst for industrial water splitting. 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 single atom dispersion of Pt by electrodeposition method (Cu/Ni-Pt). Hydrogen evolution and corrosion behaviours of prepared electrode (Cu/Ni-Pt) are examined in 1.0 M KOH solution using cyclic voltammetry (CV), cathodic current-potential curves, electrochemical impedance spectroscopy (EIS) and anodic current-potential curves. Moreover, electrocatalytic activity of Cu/Ni-Pt is also compared with Cu/Ni-Pd. The resultant Pt-based electrocatalyst with single atom dispersion has remarkably boosted hydrogen evolution acitivity of Cu/Ni as well as showing high corrosion performance after long-term immersion times. We emphasize the investigation of Pt-based single atom-containing electrocatalysts on the HER activity.Article Citation - WoS: 0Citation - Scopus: 0Electrochemical Tuning of Ni-Fe Catalysts Using Various Techniques for Efficient Hydrogen Evolution in Alkaline Media(Mdpi, 2025) Toprak Döşlü, Serap; Doslu, Serap Toprak; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüThe search for cost-effective and scalable electrocatalysts for the hydrogen evolution reaction (HER) remains a critical challenge in advancing sustainable energy technologies. This study presents a novel approach to optimizing nickel-iron (Ni-Fe) alloy coatings on graphite (G) electrodes through a strategic combination of composition tuning, nickel modification, and various electrochemical optimizations. Unlike conventional studies, which primarily focus on static alloy compositions, this work systematically investigates the impact of dynamic nickel modification durations on the catalytic performance and conductivity of Ni-Fe alloys. By addressing the conductivity limitations caused by iron oxidation, the study demonstrates the enhanced HER kinetics achieved with a Ni-modified G/Ni%95Fe%5-Ni(60s) electrode. Electrochemical and structural analyses reveal the synergistic effects of nickel modifications on improving active site accessibility, reducing overpotential, and increasing hydrogen production efficiency. This work introduces a scalable methodology for tailoring Ni-Fe catalysts, offering significant advancements in the development of robust, cost-effective electrocatalysts for industrial-scale hydrogen production.Article Citation - WoS: 11Citation - Scopus: 14Electrocatalysis property of CuZn electrode with Pt and Ru decoration(International Journal of Hydrogen Energy, 2021) Toprak Döşlü, Serap; Döner, Ali; Yıldız, Reşit; Yıldız, Reşit; Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüElectrocatalysis 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 (XRD) and atomic force microscopy (AFM) are performed to determine the morphological and compositional structures. Electrocatalysis properties are evaluated by cathodic current-potential curves, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) in 1.0 M KOH solution. Chronoamperometry (CA) and cycle tests are used for stability/durability of electrocatalysts. Results show that a small onset potential of the porous Cu/Ni/CuZn–Pt is obtained for HER. Exchange current density and polarization resistance are found to be 5.39 mA cm−2 and 2.0 Ω cm2 at overpotential of −100 mV for porous Cu/Ni/CuZn–Pt, respectively, indicating that Cu/Ni/CuZn–Pt is higher electrocatalytic properties than the others. Moreover, very low overpotentials at 10 and 40 mA cm−2 are obtained on porous Cu/Ni/CuZn–Pt compared with porous Cu/Ni/CuZn–Ru and Cu/Ni/CuZn. Porous Cu/Ni/CuZn–Pt also displays excellent stability/durability in test solution. The remarkable electrocatalysis properties of porous Cu/Ni/CuZn–Pt can be explained due to high porous structure, leaching of Zn from the deposit, intrinsic activity of Pt as well as changing in the electronic structure. It should be considered that porous Cu/Ni/CuZn–Pt is of high corrosion resistance in test solution for 120 h, which makes it good candidate for HER.Conference Object Experimental and theoretical study on hydrogen production by using Ag nanoparticle‐decorated graphite/Ni cathode(2021) Yıldız, Reşit; Doğru, Mert, Başak; KARAZEHİR, TOLGA; GÜRDAL DURĞUN, YELİZ; Toprak Döşlü, Serap; Yıldız, Reşit; Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüIn this study, graphite (G) electrode was coated with nickel and decorated with silver nanoparticles (G/Ni/Ag) with the help of galvanostatic method, and electrodes were used as a cathode in alkaline water electrolysis system. The characterization was achieved using X-ray diffraction and field emission scanning electron microscopy. Hydrogen evolution performance of electrodes was investigated via cyclic voltammetry, chronoamperometry, cathodic polarization curves, and electrochemical impedance measurements. Electrochemical results showed that hydrogen production efficiency significantly increased and charge transfer resistance decreased via G/Ni/Ag. The electrochemical water splitting performance of G/Ni/Ag, was established in a joint experimental and computational effort. Water and proton adsorption on Ag-decorated Ni surface were investigated using density functional theory. Electronic structure calculations identified the role of Ag adatom and Ni surface on water and proton adsorptions. From the computational studies, O in water was more reliable to adsorb at the bridge position of the Ag and Ni atoms, leading improved orbital overlap between H and Ni atoms and maximized chemical and physical interactions between the H2O molecules. Therefore, the Ag-decorated Ni(111) surface provides preferable adsorption site for the O atom in water and direct interactions between water Hs and available surface Ni atoms promote water dissociation.Article Mezopotamya’da Doğan ve Hiç Batmayan Mardin Güneşi: Bulgur(2022) Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüBulgur, binlerce yıl öncesine dayanan geçmişe sahip, pek çok kültür ve toplumda yer almış, ilk üretiminden günümüze kadar yöntem olarak değişikliğe uğramamış, lezzetli, besleyici ve doğal bir üründür. Bulgur sadece yemeklerin ana malzemesi olmanın dışında sevinç ve kederde, varlık ve yoklukta, yaşam ve ölümde kültürün bir parçası olarak varlık göstermiştir. Tahıl üretimin ilk yapıldığı yer kabul edilen Mezopotamya topraklarında üretilen bulgur, hem eşsiz Mardin yemeklerinin yapımında kullanılmakta, hem de Türkiye’nin bulgur ihtiyacının önemli bir kısmını karşılamaktadır. Bu derlemede Mardin bulgurunun hem beslenmedeki hem de mutfak kültüründeki önemi vurgulanmıştır.Conference Object Electrochemical Hydrogen Production by Using G/Ni/Ag CathodeYıldız, Reşit; Doğru, Mert, Başak; Toprak Döşlü, Serap; Yıldız, Reşit; Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüIn this study graphite (G) electrode was coated with nickel and decorated with silver (G/Ni/Ag) and we used this modified electrode as cathode in alkaline water electrolysis system. The electrochemical characterization of G, G/Ni and G/Ni/Ag was achieved via cyclic voltammetry technique. Hydrogen evolution performance of electrodes was investigated via chronoamperomety, cathodic polarization curves and electrochemical impedance measurements. Results showed that hydrogen production efficiency significantly increased and charge transfer resistance of electrodes decreased via Ni/Ag multilayer.Article Citation - WoS: 12Citation - Scopus: 13Experimental and theoretical study on hydrogen production by using Ag nanoparticle-decorated graphite/Ni cathode(International Journal of Energy Research, 2021) Yıldız, Reşit; Doğru Mert, Başak; Karazehir, Tolga; Gurdal, Yeliz; Toprak Döşlü, Serap; Yıldız, Reşit; Toprak Döşlü, Serap; Doğru Mert, Başak; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik Bölümü; Department of Nursing / Hemşirelik BölümüIn this study, graphite (G) electrode was coated with nickel and decorated with silver nanoparticles (G/Ni/Ag) with the help of galvanostatic method, and electrodes were used as a cathode in alkaline water electrolysis system. The characterization was achieved using X-ray diffraction and field emission scanning electron microscopy. Hydrogen evolution performance of electrodes was investigated via cyclic voltammetry, chronoamperometry, cathodic polarization curves, and electrochemical impedance measurements. Electrochemical results showed that hydrogen production efficiency significantly increased and charge transfer resistance decreased via G/Ni/Ag. The electrochemical water splitting performance of G/Ni/Ag, was established in a joint experimental and computational effort. Water and proton adsorption on Ag-decorated Ni surface were investigated using density functional theory. Electronic structure calculations identified the role of Ag adatom and Ni surface on water and proton adsorptions. From the computational studies, O in water was more reliable to adsorb at the bridge position of the Ag and Ni atoms, leading improved orbital overlap between H and Ni atoms and maximized chemical and physical interactions between the H2O molecules. Therefore, the Ag-decorated Ni(111) surface provides preferable adsorption site for the O atom in water and direct interactions between water Hs and available surface Ni atoms promote water dissociation.Article Citation - WoS: 1Citation - Scopus: 1Electrochemical 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 BölümüThe 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.Article Electrocatalysis property of CuZn electrode with Pt and Ru decoration(2021) Toprak Döşlü, Serap; DÖNER, ALİ; Yıldız, Reşit; Yıldız, Reşit; Toprak Döşlü, Serap; Department of Nutrition and Dietetics/ Beslenme ve Diyetetik BölümüElectrocatalysis 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 (XRD) and atomic force microscopy (AFM) are performed to determine the morphological and compositional structures. Electrocatalysis properties are evaluated by cathodic current-potential curves, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) in 1.0 M KOH solution. Chronoamperometry (CA) and cycle tests are used for stability/durability of electrocatalysts. Results show that a small onset potential of the porous Cu/Ni/CuZnePt is obtained for HER. Exchange current density and polarization resistance are found to be 5.39 mA cm2 and 2.0 U cm2 at overpotential of 100 mV for porous Cu/Ni/CuZnePt, respectively, indicating that Cu/Ni/CuZnePt is higher electrocatalytic properties than the others. Moreover, very low overpotentials at 10 and 40 mA cm2 are obtained on porous Cu/ Ni/CuZnePt compared with porous Cu/Ni/CuZneRu and Cu/Ni/CuZn. Porous Cu/Ni/CuZn ePt also displays excellent stability/durability in test solution. The remarkable electrocatalysis properties of porous Cu/Ni/CuZnePt can be explained due to high porous structure, leaching of Zn from the deposit, intrinsic activity of Pt as well as changing in the electronic structure. It should be considered that porous Cu/Ni/CuZnePt is of high corrosion resistance in test solution for 120 h, which makes it good candidate for HER.
