Scan Rate Effect of 1-(4-methoxyphenyl)-1H-Pyrrole Electro-coated on Carbon Fiber: Characterization via Cyclic Voltammetry, FTIR-ATR and Electrochemical Impedance Spectroscopy

Abstract

Poly(1-(4-methoxyphenyl)-1H-Pyrrole) films were electrodeposited onto carbon fiber micro electrodes with different deposition rates by using cyclic voltammogram in the presence of tetraethyl ammonium perchlorate (TEAP) / dichloromethane (CH2Cl2) as electrolyte solution. Scan rate effect on the electropolymerization, morphology and electrochemical impedance spectroscopic behaviour of modified carbon fiber micro-electrode was investigated. Electro-growth process was achieved by applying various scan rates of 10, 20, 40, 60 and 100 mVs(-1). Poly(1-(4-methoxyphenyl)-1H-Pyrrole) coated CFMEs were characterized by FTIR-ATR spectroscopy. Surface morphology of the polymer films were characterized by using Scanning electron microscopy (SEM). Besides, capacitive properties were recognized by electrochemical impedance measurements. Capacitive behaviors of coated carbon fiber micro electrodes were defined via Nyquist plots, Bode-Magnitude plot and Bode-phase definitions. As a result, a good correlation was obtained between electro-growth processes, electrochemical impedance data and morphological studies.