Frequency dependence of the electrical impedance of electrolytic cells: The role of the ionic adsorption/desorption phenomena and the Stern layer

2006 ◽  
Vol 360 (1) ◽  
pp. 179-182 ◽  
Author(s):  
G. Barbero ◽  
A.M. Figueiredo Neto ◽  
F.C.M. Freire ◽  
M. Scalerandi
Keyword(s):  
Frequency Dependence ◽  
Electrical Impedance ◽  
Stern Layer ◽  
Electrolytic Cells ◽  
Ionic Adsorption ◽  
Adsorption Desorption

Frequency dispersion in the fractional Langmuir approximation for the adsorption–desorption phenomena

2020 ◽  
Vol 476 (2238) ◽  
pp. 20190570 ◽  
Author(s):  
Giovanni Barbero ◽  
Luiz Roberto Evangelista ◽  
Ervin K. Lenzi
Keyword(s):  
Relaxation Times ◽  
Complex Impedance ◽  
Frequency Dispersion ◽  
Homogeneous Distribution ◽  
Spectroscopy Data ◽  
Effective Parameters ◽  
Electrolytic Cells ◽  
Interfacial Behaviour ◽  
Adsorption Desorption

We propose that a kinetic equation of fractional order may be used to account for the frequency dispersion of the effective parameters in the framework of the Langmuir approximation for the adsorption–desorption phenomena. A frequency dependence of these parameters naturally arises in this formalism, indicating that it may play a similar role of a generalization of the Langmuir isotherm obtained from a homogeneous distribution of relaxation times. The fractional approach formalism opens the possibility to consider different relaxation regimes characterizing the interfacial behaviour of electrolytic cells, and may be a powerful tool to interpret complex impedance spectroscopy data.

Role of the Adsorption Phenomenon on the Ionic Equilibrium Distribution and on the Transient Effects in Electrolytic Cells

2006 ◽  
Vol 110 (36) ◽  
pp. 17889-17897 ◽  
Author(s):  
Giovanni Barbero ◽  
Fernando C. M. Freire ◽  
Marco Scalerandi ◽  
Anca L. Alexe-Ionescu
Keyword(s):  
Equilibrium Distribution ◽  
Transient Effects ◽  
Ionic Equilibrium ◽  
Adsorption Phenomenon ◽  
Electrolytic Cells

Role of direct and inverted undoped spiro-OMeTAD–perovskite architectures in determining solar cells performances: an investigation via electrical impedance spectroscopy

2019 ◽  
Vol 21 (12) ◽  
pp. 6613-6621 ◽  
Author(s):  
Marianna Ambrico ◽  
Paolo F. Ambrico ◽  
Luisa De Marco ◽  
Rosabianca Iacobellis ◽  
Arianna D’Abramo ◽  
...  
Keyword(s):  
Solar Cells ◽  
Impedance Spectroscopy ◽  
Electrical Impedance ◽  
Electrical Impedance Spectroscopy ◽  
Impedance Response ◽  
Inverse Structure

Spiro-OMeTAD/perovskite direct and inverse structure architectures’ influence on the performance of solar cells are elucidated via the analysis of the structure impedance response.

scholarly journals Role of frequency dependence in dynamical gap generation in graphene

2018 ◽  
Vol 97 (11) ◽  
Author(s):  
M. E. Carrington ◽  
C. S. Fischer ◽  
L. von Smekal ◽  
M. H. Thoma
Keyword(s):  
Frequency Dependence

Facilitating role of Pd for hydrogen, oxygen and water adsorption/desorption processes from bulk CeO2 and CeO2/γ-Al2O3

2019 ◽  
Vol 323 ◽  
pp. 141-147 ◽  
Author(s):  
Deniz Kaya ◽  
Dheerendra Singh ◽  
Serkan Kincal ◽  
Deniz Uner
Keyword(s):  
Water Adsorption ◽  
Adsorption Desorption

Carbonised polyaniline and polypyrrole: towards advanced nitrogen-containing carbon materials

2013 ◽  
Vol 67 (8) ◽  
Author(s):  
Gordana Ćirić-Marjanović ◽  
Igor Pašti ◽  
Nemanja Gavrilov ◽  
Aleksandra Janošević ◽  
Slavko Mentus
Keyword(s):  
Electrical Conductivity ◽  
Carbon Materials ◽  
Modern Technology ◽  
Electron Microscopies ◽  
Transmission Electron ◽  
Elemental Analyses ◽  
Adsorption Desorption

AbstractPolyaniline (PANI) and polypyrrole (PPY) undergo carbonisation in an inert/reduction atmosphere and vacuum, yielding different nitrogen-containing carbon materials. This contribution reviews various procedures for the carbonisation of PANI and PPY precursors, and the characteristics of obtained carbonised PANI (C-PANI) and carbonised PPY (C-PPY). Special attention is paid to the role of synthetic procedures in tailoring the formation of C-PANI and C-PPY nanostructures and nanocomposites. The review considers the importance of scanning and transmission electron microscopies, XPS, FTIR, Raman, NMR, and EPR spectroscopies, electrical conductivity and adsorption/desorption measurements, XRD, and elemental analyses in the characterisation of C-PANIs and C-PPYs. The application of C-PANI and C-PPY in various fields of modern technology is also reviewed.

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