Toprak Döşlü, Serap
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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
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Sustainable Development Goals
17
PARTNERSHIPS FOR THE GOALS
0
Research Products
2
ZERO HUNGER
0
Research Products
5
GENDER EQUALITY
0
Research Products
6
CLEAN WATER AND SANITATION
0
Research Products
13
CLIMATE ACTION
1
Research Products
10
REDUCED INEQUALITIES
0
Research Products
16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
15
LIFE ON LAND
0
Research Products
3
GOOD HEALTH AND WELL-BEING
0
Research Products
9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
1
Research Products
14
LIFE BELOW WATER
0
Research Products
4
QUALITY EDUCATION
0
Research Products
1
NO POVERTY
0
Research Products
7
AFFORDABLE AND CLEAN ENERGY
12
Research Products
11
SUSTAINABLE CITIES AND COMMUNITIES
0
Research Products
12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
Documents
8
Citations
120
h-index
5
Documents
8
Citations
114
Scholarly Output
23
Articles
12
Views / Downloads
224/1769
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0
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0
WoS Citation Count
53
Scopus Citation Count
58
WoS h-index
3
Scopus h-index
3
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0
Projects
0
WoS Citations per Publication
2.30
Scopus Citations per Publication
2.52
Open Access Source
20
Supervised Theses
0
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| Journal | Count |
|---|---|
| International Journal of Hydrogen Energy | 3 |
| International World Energy Conference-II | 2 |
| Chemistryopen | 1 |
| Fırat üniversitesi Mühendislik Bilimleri Dergisi | 1 |
| international Confererence on Condensed Matter and Materials Science | 1 |
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23 results
Scholarly Output Search Results
Now showing 1 - 10 of 23
Article Investigation of the hydrogen evolution on Ni deposited titanium oxide nano tubes(Corrosion Science, 2012) Altunbaş Şahin, Ece; Doğru Mert, Başak; Toprak Döşlü, Serap; Kardaş, GülfezaTitanium 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.Article Polyindole top coat on TiO2 sol–gel films for corrosion protection of steel(Corrosion Science, 2013) Toprak Döşlü, Serap; Doğru Mert, Başak; Yazıcı, BirgülThe protection efficiency of polyindole film on stainless steel was enhanced via titanium dioxide precoating. The characterization of coatings was achieved by nuclear magnetic resonance and Fourier-transform infrared spectra. The surface morphology of electrodes was monitored with scanning electron microscope. The corrosion performance was investigated in 3.5% NaCl solution by electrochemical impedance spectroscopy and potentiodynamic measurements. The quantum calculations were employed, and theoretical parameters were determined. Results showed that the correlation between experimental and theoretical parameters. The high protection efficiency was observed against corrosion on the steel surface via forming a protective polyindole top coated titanium dioxide film.Conference Object ÇÖREK OTU TOHUM YAĞINDAN ÜRETİLEN BİYODİZELİN FİZİKSEL ÖZELLİKLERİNİN VE KOROZYON ETKİSİNİN ARAŞTIRILMASI(2022) Ercan Leyla; Ercan Leyla, TOPRAK DÖŞLÜ SERAPÜlkeler için enerjide dışa bağımlılığı azaltmak ve böylece enerji güvenliğini sağlamak gibi nedenlerle bitkisel yağlardan biyodizel yakıt üretimi alternatif enerji kaynağı arayışlarında pek çok araştırmaya konu olmaktadır. Petrol, kömür gibi fosil yakıtların sınırlı oluşu, yeryüzünde belirli bölgelerde bulunması gibi sebepler bu kaynaklara sahip olmayan toplumları maliyet ve ulaşım açısından olumsuz etkilemektedir. Ayrıca bu fosil yakıtların çevreye zararları da düşünüldüğünde alternatif enerji kaynaklarını araştırmak tüm toplumlar için bir zorunluluk halini almıştır. Hem biyolojik olarak parçalanabilirliği hem de sera etkisini azaltması biyodizel yakıtların fosil yakıtlara göre tercih edilmesindeki avantajlarındandır. Özellikle yağlı tohumlar biyodizel üretiminde yaygın kullanılmaktadır. Bu amaçla bu çalışmada son zamanlarda sağlığa yararları konusunda popüler bir şekilde öne çıkarılan çörek otu (Nigella sativa) tohumu kullanılmıştır. Soğuk sıkım olarak elde edilen çörek otu tohumunun yağı kullanılarak oluşturulan biyodizelin rengi, kokusu, yoğunluk ölçümü, akma noktası, bulutlanma noktası, kinematik viskozitesi ve korozyon etkisi incelenmiştir. Bunlara ek olarak biyodizel üretimi esnasında oluşan atıkların ICP-MS (Inductively coupled plasma mass spectrometry) cihazında mineral analizi (Mg, Mn, K, Zn ve Fe) yapılmıştır. Bunun yanı sıra bu yan ürünün pH değerleri ölçülmüş ve gübre olarak kullanılıp kullanılmayacağı araştırılmıştır. Böylece hem çörek otu tohum yağından elde edilen biyodizelin verimliliği fiziksel özellikleri açısından incelenmiş hemde yan ürün olarak elde edilen gübrenin özellikleri incelenmiştir. Çalışmanın sonucunda elde edilen biyodizelin yoğunluğu 894 kg/m3 bulunurken akma noktası 1.0 ℃ ve bulutlanma noktası -1.0 ℃ olarak bulunmuştur. Bunun yanı sıra yan ürün olarak biyodizel sentezi sırasında elde edilen gliserolde rengi, mineralleri ve pH'sı bakımından incelenmiştir. Ayrıca çörek otu tohum yağından elde edilen biyodizelin bakır şerit korozyon test cihazı ile bakır şerit üzerine korozyon etkisi incelendiği gibi yumuşak çelik (karbon çelik) üzerinede elektrokimyasal olarak korozyon etkisi, elektrokimyasal empedans spektroskopisi (EIS), açık devre potansiyeli (OCP) ölçümleri yapılarak belirlendi. Gıda sanayinde yoğun olarak kullanılan ve son dönemlerde farklı alanlarda kullanımı araştırılan çörek otu tohum yağının biyodizel ve gübre üretiminde verimliliği incelenmiştir.Article CuZn Elektrotundan Zn’nin Uzaklaştırılmasının Hidrojen Çıkış Davranışı Üzerine Etkisi(2021) Toprak Döşlü, SerapHidrojen üretiminde, elektrokimyasal yolla suyun ayrıştırılmasında yüksek katalitik aktiviteye sahip ve kararlı elektrotların geliştirilmesi çok önemlidir. Burada, CuZn elektrotunun fabrikasyonunu yapmak için ucuz alkali uzaklaştırma yöntemi kullanılmış ve bu yöntem elektrota, hidrojen oluşum reaksiyonu (HER) için yüksek yüzey alanı ve verimli aktif merkezler sağlamıştır. CuZn elektrotu karakterize etmek için, taramalı elektron mikroskop (SEM), enerji dağılımlı X-Işını (EDX), atomik kuvvet mikroskop (AFM) ve Dönüşümlü voltametri (CV) tekniklerinden yararlanılmıştır. CuZn elektrotunun hidrojen oluşum karakteristiği 1,0 M KOH çözeltisinde, bakır kaplı bakır elektrot (Cu/Cu) ile kıyaslanmıştır. SEM analizlerine göre, Cu/Cu elektrotta bakır nano-tanecikler yüzeye dağılırken, CuZn elektrotta karnabahara benzeyen şekiller elde edilmiştir. Metallerin karakteristik pikleri CV ve EDX spektrumlarında ortaya çıkmıştır. HER etkinlikleri değerlendirildiğinde, CuZn elektrot (0.309 mA cm-2 ), Cu/Cu elektrot (0.043 mA cm-2 ) ile kıyaslandığında yüksek yük değişimi akım yoğunluğu elde edilmiştir. Ayrıca, CuZn elektrot, 50 mA cm-2 akım yoğunluğunda daha düşük aşırı gerilime ve daha düşük Tafel eğimine sahiptir. Bu CuZn elektrotun Cu/Cu elektrotundan daha yüksek HER performansına sahip olduğu anlamına gelir. Bu yüksek katalitik aktivite, alkali uzaklaştırma nedeniyle yüksek yüzey alanı ve Zn ve Cu metallerinin sinerjistik etkisi ile açıklanabilir. Bu deneylere ek olarak, CuZn elektrot bazik ortamda 18000 saniye boyunca oldukça yüksek kararlılık ve dayanıklılık göstermiştir.Presentation Theoretical Approaches on Adsorption Mechanism and Inhibition Efficiency of Triazine Derivatives(4rd Internatıonal Turkıc World Conference on Chemıcal Scıences and Technologıes (ITWCCST2018), 2018) Doğru Mert, Başak; Yıldız, Reşit; Toprak Döşlü, Serap; Dehri, İlyas; Yazıcı, Birgül…Article Citation - WoS: 15Citation - Scopus: 17Electrocatalysis property of CuZn electrode with Pt and Ru decoration(International Journal of Hydrogen Energy, 2021) Toprak Döşlü, Serap; Döner, Ali; Yıldız, ReşitElectrocatalysis 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, SerapIn 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.Conference Object Electrochemical Behavior of Single Pt atoms dispersed on Cu/Ni Electrode in Alkaline Environment(2023) DÖNER, ALİ; Toprak Döşlü, SerapIt 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 Electrocatalysis property of CuZn electrode with Pt and Ru decoration(2021) Toprak Döşlü, Serap; DÖNER, ALİ; Yıldız, ReşitElectrocatalysis 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.Article Citation - WoS: 3Citation - Scopus: 3Electrochemical Tuning of Ni-Fe Catalysts Using Various Techniques for Efficient Hydrogen Evolution in Alkaline Media(Mdpi, 2025) Topak, Ali; Doslu, Serap ToprakThe 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.
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