This study reports a detailed analysis of an electrode material containing poly(phenolphthalein), carbon nanotubes and gold nanoparticles which shows superior catalytic effect towards to hydrazine oxidation in Britton–Robinson buffer (pH ). Glassy carbon electrode was modified by electropolymerization of phenolphthalein (PP) monomer (poly(PP)/GCE) and the multiwalled carbon nanotubes (MWCNTs) was dropped on the surface. This modified surface was electrodeposited with gold nanoparticles (AuNPs/CNT/poly(PP)/GCE). The fabricated electrode was analysed the determination of hydrazine using cyclic voltammetry, linear sweep voltammetry and amperometry. | Turkish Journal of Chemistry Turk J Chem 2021 45 167-180 http chem TÜBİTAK Research Article doi kim-2009-12 Sensitive determination of hydrazine using poly phenolphthalein Au nanoparticles and multiwalled carbon nanotubes modified glassy carbon electrode 1 1 2 3 Müge HATİP Süleyman KOÇAK Zekerya DURSUN 1 Department of Chemistry Faculty of Science and Letters Manisa Celal Bayar University Manisa Turkey 2 Applied Science Research Center ASRC Manisa Celal Bayar University Manisa Turkey 3 Department of Chemistry Faculty of Science Ege University İzmir Turkey Received Accepted Published Online Final Version Abstract This study reports a detailed analysis of an electrode material containing poly phenolphthalein carbon nanotubes and gold nanoparticles which shows superior catalytic effect towards to hydrazine oxidation in Britton Robinson buffer pH . Glassy carbon electrode was modified by electropolymerization of phenolphthalein PP monomer poly PP GCE and the multiwalled carbon nanotubes MWCNTs was dropped on the surface. This modified surface was electrodeposited with gold nanoparticles AuNPs CNT poly PP GCE . The fabricated electrode was analysed the determination of hydrazine using cyclic voltammetry linear sweep voltammetry and amperometry. The peak potential of hydrazine oxidation on bare GCE poly PP GCE CNT GCE CNT poly PP GCE and AuNPs CNT poly PP GCE were observed at 596 mV 342 mV 320 mV 313 mV and 27 mV respectively. A shift in the overpotential to more negative direction and an enhancement in the peak current indicated that the AuNPs CNT poly PP GC electrode presented an efficient electrocatalytic activity toward oxidation of hydrazine. Modified electrodes were characterized with High-resolution transmission electron microscopy HRTEM scanning electron microscopy SEM X-ray photoelectron spectroscopy XPS and electrochemical impedance spectroscopy EIS . Amperometric current responses in the low
