scholarly journals ESTUDO DAS PROPRIEDADES FOTOELETROQUÍMICAS DO POLI(AZO-BISMARCK BROWN R) OBTIDO POR ELETROPOLIMERIZAÇÃO PARA SENSIBILIZAÇÃO DE CÉLULAS SOLARES

2018 ◽  
Vol 10 (3) ◽  
pp. 51-65
Author(s):  
Jessica Crivelaro Pacheco ◽  
André Olean-Oliveira ◽  
Diego Noé David-Parra ◽  
Marcos F. S. Teixeira
Keyword(s):  
Cyclic Voltammetry ◽  
Electrical Resistance ◽  
Electrochemical Impedance ◽  
Electrical Conductance ◽  
Photovoltaic Device ◽  
Interfacial Phenomena ◽  
Organic Photovoltaic ◽  
Conductive Glass ◽  
Azo Group ◽  
Induced Changes

The present research investigates the electrochemical behavior of a solar cell sensitized with Bismark Brown R azopolymer. This cell was developed from the electropolymerization of the dye on a conductive glass substrate coated with fluorine-doped tin oxide(FTO) by cyclic voltammetry. The photosensitive behavior of the obtained film was analyzed by cyclic voltammetry and chronoamperometry in the presence of pulsed light. The poly(azo-Bismarck R) exhibited reversible light-induced changes of electrical conductance, due to azo group photoisomerization. Electrochemical impedance spectroscopy was also carried out under a light source. This technique allowed to evaluate interfacial phenomena existing in the photovoltaic device, performing a Recebido em: 27/08/2018Aprovado em: 16/09/2018 52Colloquium Exactarum, v. 10, n.3,Jul-Set. 2018, p.51–65. DOI: 10.5747/ce.2018.v10.n3.e245detailed investigationof its photoelectrochemical properties. A decrease in electrical resistance was observed with the lightincidence on the polymer membrane indicating charge transfer to the polymer conduction band.Photo-responsive film of Bismarck Brown can be developed for advanced organic photovoltaic such as solar cells.

The Effect of Boric Acid Addition on the Performance of a Gelled Electrolyte

2013 ◽  
Vol 712-715 ◽  
pp. 321-324
Author(s):  
Dong Liang Lu ◽  
Dang Jun Zhang ◽  
Chun Yan Duan ◽  
Tao Lin
Keyword(s):  
Cyclic Voltammetry ◽  
Electron Microscope ◽  
Boric Acid ◽  
Electrical Resistance ◽  
Corrosion Test ◽  
Electrochemical Impedance ◽  
Linear Sweep Voltammetry ◽  
Linear Sweep ◽  
Equivalent Circuit Analysis ◽  
Scanning Electron

The aim of this study is to evaluate the effect of boric acid as an additive for gelled electrolytes. Cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and an equivalent circuit analysis were employed to study the electrochemical performance of the gelled electrolyte with the addition of varying amounts of boric acid. Scanning electron microscope (SEM) was employed to observe the grid corrosion in corrosion test. For moderate contents of boric acid, the electrode capacity improved, as well as the oxygen evolution profermance. However, the adverse effects of boric acid were found to include increased electrical resistance, decreased hydrogen evolution overpotential and promote the corrosion of the grid. The experimental results indicates that the optimum content was 0.4wt.%.

scholarly journals Purification and electronic characterisation of 18 isomers of the OPV acceptor material bis-[60]PCBM

2017 ◽  
Vol 53 (5) ◽  
pp. 975-978 ◽  
Author(s):  
W. Shi ◽  
X. Hou ◽  
T. Liu ◽  
X. Zhao ◽  
A. B. Sieval ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Absorption Spectroscopy ◽  
Photovoltaic Device ◽  
Organic Photovoltaic ◽  
Isomer Mixture ◽  
Organic Photovoltaic Device

The as-produced isomer mixture of the organic photovoltaic device acceptor material bis-[60]PCBM has been purified into its constituents by peak-recycling HPLC, and those individual isomers were characterised by UV-Vis absorption spectroscopy and cyclic voltammetry.

Cyclohexane oxidation: relationships of the process efficiency with electrical conductance, electronic and cyclic voltammetry spectra of the reaction mixture

2021 ◽  
Vol 132 (1) ◽  
pp. 123-137
Author(s):  
Alexander Pokutsa ◽  
Andriy Zaborovsky ◽  
Pawel Bloniarz ◽  
Tomasz Paczeŝniak ◽  
Dariya Maksym ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrical Conductance ◽  
Cyclohexane Oxidation ◽  
Process Efficiency

Study on the Electrochemical Behavior of Ferric Stearate and its Electro-Catalytic Oxidation of Hydrogen Peroxide

2009 ◽  
Vol 610-613 ◽  
pp. 161-164
Author(s):  
Li Li Liang ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Hydrogen Peroxide ◽  
Cyclic Voltammetry ◽  
Catalytic Oxidation ◽  
Tin Oxide ◽  
Electrochemical Behavior ◽  
Doctor Blade ◽  
Conductive Glass ◽  
Oxidation Of Hydrogen ◽  
Electro Catalytic Oxidation ◽  
Catalytic Effects

A ferric stearate electrode was made by doctor-blade methods using the Fluorine tin oxide (FTO) conductive glass. The electrochemical behavior of ferric stearate electrode was studied by the cyclic voltammetry. The electro-catalytic effects of ferric stearate on H2O2 were also investigated by cyclic voltammetry.

Enhanced Electrochemical Oxidation of BH4− on Pt Electrode in Alkaline Electrolyte with the Addition of Thiourea

2010 ◽  
Vol 132 ◽  
pp. 271-278 ◽  
Author(s):  
Dan Mei Yu ◽  
Chang Guo Chen ◽  
Shu Lei ◽  
Xiao Yuan Zhou ◽  
Guo Zhong Cao
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Oxidation ◽  
Electrochemical Impedance ◽  
Alkaline Electrolyte ◽  
Hydroxyl Groups ◽  
Catalytic Hydrolysis ◽  
Direct Oxidation ◽  
Pt Electrode ◽  
Separation Membrane ◽  
And Diffusion

The electrochemical oxidation of sodium borohydride (NaBH4) on Pt electrode in alkaline electrolyte with the addition of thiourea has been studied by means of cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronopotentiometry (CP). NaBH4 is readily to react with hydroxyl groups to release hydrogen through either direct oxidation or catalytic hydrolysis. The experimental results demonstrated that the addition of an appropriate amount of thiourea to the alkaline electrolyte resulted in the suppression of catalytic hydrolysis and diffusion of borohydride ions through the separation membrane.

scholarly journals A new electrochemical sensor based on carbon paste electrode/Ru(III) complex for determination of nitrite: Electrochemical impedance and cyclic voltammetry measurements

Measurement ◽  
2016 ◽  
Vol 92 ◽  
pp. 524-533 ◽  
Author(s):  
Achour Terbouche ◽  
Siham Lameche ◽  
Chafia Ait-Ramdane-Terbouche ◽  
Djamila Guerniche ◽  
Djahida Lerari ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Carbon Paste Electrode ◽  
Electrochemical Impedance ◽  
Carbon Paste ◽  
Paste Electrode

scholarly journals An Electrochemical Sensor Based On Graphite Electrode Modified With Silica Containing 1-N-Propyl-3-Methylimidazolium Species For Determination Of Ascorbic Acid

2019 ◽  
Vol Vol. 14, No.1 ◽  
pp. 5-14 ◽  
Author(s):  
Anastasiya Tkachenko ◽  
Mykyta Onizhuk ◽  
Oleg Tkachenko ◽  
Leliz T. Arenas ◽  
Edilson V. Benvenutt ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Cyclic Voltammetry ◽  
Electrochemical Sensor ◽  
Electrochemical Impedance ◽  
Limit Of Detection ◽  
Pharmaceutical Formulations ◽  
Differential Pulse ◽  
Long Term Stability ◽  
Diffusion Limited

In the present study, an electrochemical sensor based on the electrode (SiMImCl/C) consisting of graphite and silica, grafted with 1-n-propyl-3-methylimidazolium chloride was used for ascorbic acid (AA) quantification in pharmaceuticals and food formulations. Cyclic voltammetry and electrochemical impedance spectroscopy were applied for electrochemical characterization of the SiMImCl/C electrode. The cyclic voltammetry study revealed that the oxidation of AA on this electrode is an irreversible process, realized by adsorption and diffusion limited step. The differential pulse voltammetry was applied to develop a procedure for the AA determination. The linear range was found to be 0.3–170 μmol L-1 and the limit of detection – 0.1 μmol L-1. The proposed SiMImCl/C electrode has long term stability and does not show electrochemical activity towards the analytes, which commonly coexist with AA. The sensor was successfully used for quantification of AA in food and pharmaceutical formulations.

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