Growth mechanism during the early stages of electrodeposition of bismuth telluride Bi2Te3 on ITO substrate

Youbi, Boubaker; Lghazi, Youssef; Himi, Mohammed Ait; Bahar, Jihane; Bimaghra, I.

doi:10.1016/j.matpr.2020.04.338

Cited by 9 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5) were plotted for the ascending part of the j-t transient according to the theoretical models developed by Astley 30 describing the instantaneous 3D nucleation/growth mechanisms (Eq. 5) 31 and progressive 3D nucleation/growth mechanisms, (Eq. 6).…”

Section: Resultsmentioning

confidence: 99%

Nucleation, Growth and Electrochemical Performances of Polyaniline Electrodeposited on ITO Substrate

Aynaou¹,

Youbi²,

Lghazi³

et al. 2022

J. Electrochem. Soc.

View full text Add to dashboard Cite

We first determined the electrodeposition mechanism of a polyaniline film on the ITO (Indium tin oxide) substrate in an acidic medium (HNO3 1M ) using chronoamperometry. The analysis of the ascending parts and maxima of the current density-time transients and the images obtained by scanning electron microscopy, allowed us to deduce that the polyaniline electrodeposition follows the mechanism of progressive 3D nucleation and growth. We then studied, by cyclic voltammetry and galvanostatic charge-discharge, the effect of electropolymerisation potential (0.8, 0.9, 1.0, 1.1, and 1.2V) on the specific capacitance of the films. Cyclic voltammetry shows that the specific capacitance increases from 4.28 mF/cm2 (deposition potential 0.8 V/SCE) to 43.12 mF/cm2 (potential 1.2 V/SCE) for a scan rate of 5 mV/s . The specific capacitance decreases sharply with the scan rate for the deposition potentials 1.0, 1.1, and 1.2 V/SCE, whereas it remains almost constant for the films obtained at 0.8 and 0.9 V/SCE . A similar behaviour was obtained by galvanostatic charge-discharge: the specific capacitance increases from 4.14 mF/cm2 (0.8 V/SCE) to 60.60 mF/cm2 (1.2 V/SCE) for the discharge current density 0.1 mA/cm2.

show abstract

Section: Resultsmentioning

confidence: 99%