Browsing by Author "Sharif, Kawa Hama"

Now showing 1 - 2 of 2

Catalytic Electro-Oxidation of Hydrazine by Thymol Based-Modified Glassy Carbon Electrode
(Elsevier Sci Ltd, 2022) Sharif, Kawa Hama; Kivrak, Hilal; Ozok-Arici, Omruye; Caglar, Aykut; Kivrak, Arif
In the present, thymol based new organic compounds (4A , 4B and 4C) are designed and synthesized via Steglich Esterification Reactions and Pd-catalyst Sonogashira Coupling Reactions. After isolation and characterization, thymol based hybrid molecules are used for hydrazine (N2H4) electrooxidation reactions as anode catalysts. A variety of metal based anode catalyst have been reported in literature, but this study may be the first study for thymole based hybrid molecules as an anode catalyst in fuel cells. The performance of hybrid molecules was investigated via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in hydrazine solution. Hybrid 2-isopropyl-5-methylphenyl-4-oxo-4-(5-(p-tolylethynyl)thiophen-2-yl)butanoate (4C) gives the highest performance as 3.66 mAcm(-2) (17.24 mAmg(-1)). Our results displayed that natural products like thymol derivatives may be new generation anode catalyst for fuel cells, and they may be alternative for expensive Pd and Pt based metal anode catalyst.
Synthesis of Thymol Derivatives and Its Fuel Cell Performance as an Anode Catalyst
(Health & Environment Assoc, 2022) Sharif, Kawa Hama; Ozok-Arici, Omruye; Caglar, Aykut; Kivrak, Hilal; Kivrak, Arif
Direct glucose fuel cells, essentially produce electricity from glucose, offer several advantage and might be employed in a range of applications. Becuase of stability and non-volatile, Glucose have high-intensity density. When it is oxidized water and CO2 are formed. In the current investigation, designed and synthesized new organic anode catalyst by using Thymol derivatives. Thymol based new hybrid molecules (G1,G2, and G3) were synthesized via Sonogashira cross coupling and condensation reactions. Then, electrochemical activities and charge transfer resistances (Rct) of all prepared thymol-based catalysts were studied via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), respectively in 0.5 M glucose alkaline solution. Thymol based organic catalysts exhibited a good current density at around 0.1 mA.cm(-2) for the 2-isopropyl-5-methylphenyl 4-oxo-4-(5-(p-tolylethynyl)thiophen-2-yl)butanoate (G3). As a result, A new generation of ecologically friendly and alternative metal catalyst for direct glucose fuel cells is thymol derivatives-based catalyst..