Browsing by Author "Kanberoglu, G.S."

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Nanocatalytic Architecture for the Selective Dehydrogenation of Formic Acid
(wiley, 2021) Baguc, I.B.; Kanberoglu, G.S.; Yurderi, M.; Bulut, A.; Celebi, M.; Kaya, M.; Zahmakiran, M.
Formic acid (HCOOH) is a main by-product formed through many biomass processes and has recently been proposed as one of the most promising liquid organic hydrogen carrier material in the chemical hydrogen storage for the fuel cell applications. However, efficient hydrogen (H2) generation through catalytic formic acid dehydrogenation under mild thermodynamic conditions constitutes a major challenge because poisoning of active metal center exists in catalytic systems with carbon monoxide (CO) formed as an intermediate. In this chapter, we focus on the research advances on the formic acid dehydrogenation in the presence of different nanocatalysts including monometallic, bimetallic, and trimetallic nanoparticles in the form of alloy, core@shell, and physical mixture. The main advantages and drawbacks of these systems are presented by comparing their catalytic performances depending on additives, solvents, and temperature parameters. Additionally, the morphology, structure, and composition of these nanocatalysts as well as their synthesis protocols are discussed, and new synthesis strategies are proposed to enhance the catalytic performance of nanocatalysts in the formic acid dehydrogenation. © 2021 WILEY-VCH GmbH, Boschstr. 12, 69469 Weinheim, Germany.
A Novel Flow-Injection Potentiometric Detector for Determination of Tamoxifen in Anticancer Drug Formulations
(American Scientific Publishers, 2016) Kanberoglu, G.S.; Coldur, F.; Cubuk, O.; Topcu, C.; Caglar, B.
A flow-injection potentiometric detector was reported for the rapid determination of tamoxifen (TAM), by using a poly(vinyl chloride) (PVC) membrane electrode containing tamoxifen-phosphomolibdate (TAM-PM) ion-pair as electroactive component. The potentiometric quality of the electrode response was optimized. Under the optimized condition (carrier solution: 5.0×10-7 M TAM, injection volume: 20 °L, flow-rate: 2.0 mL min-1, tubing length: 10 cm), the calibration plot for TAM was linear over the concentration range of 1.0×10-4-1.0×10-2 M with a sub-Nernstian slope of 37.7 mV per decade of TAM activity and detection limit of 4.2×10-5 M. The interference effects of some common alkaline metal, alkaline earth metal, heavy metals, organic and pharmaceutical molecules on electrode response were investigated and selectivity coefficients were calculated. The relative standard deviation of the electrode response for thirteen replicate measurements of 5.0×10-4 M TAM was 1.81%. The flow-through detector system revealed sampling rates of approximately 90 injections per hour depending on the TAM concentration of the injected sample. The offered potentiometric flow-injection system was applied for the determination of TAM in pharmaceutical preparations and the obtained results were compared with High-Performance Liquid Chromatography (HPLC) results. © 2016 American Scientific Publishers.