Electro-synthesis and Characterization of Aniline and o- Anisidine Oligomers

ABSTRACT:The electrochemical anodic electropolymerization of m-toluidin on a Pt electrode from a deoxygenated aqueous acid medium is carried out using the cyclic voltammetry technique. The effects of different parameters on the electrochemical polymerization such as the monomer, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature are investigated using a conventional three-electrode cell. The results show the presence of an oxidation peak (anodic current peak) at approximately +1110 mV vs. saturated calomel electrode in all cases of the investigated parameters. A gradual increase in the anodic current peak density (I p ) is observed with a repeating number of cycles accompanied with the appearance of a new peak at low positive potential from the second repeating cycle. In addition, the effects of m-toluidin, sulfuric acid, sodium sulfate concentrations, scan rate, and temperature values have the same behavior on I p values, in which there is an increase in I p values till certain values (different for each parameter) and then decrease. The experimentally obtained kinetic equation is deduced from values of I p , and a simplified mechanism for the electrochemical anodic polymerization of m-toluidin is proposed. Moreover, the diffusion coefficient, activation energy (E a ), and thermokinetic parameters such as entropy ( S*), enthalpy of reaction ( H*), and free energy change ( G*) are calculated. The prepared polymer is characterized by elemental analysis, UV-visible, IR, 1 H NMR, X-ray diffraction, SEM, and TGA. C

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Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

Sayyah

Abukhadra

Rabia

2016

Adv Polym Technol

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In situ electrochemical synthesis of a poly(o‐anisidine) counter electrode for a dye‐sensitized solar cell

Menaka

Manisankar

Stalin

2015

J of Applied Polymer Sci

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Poly(o‐anisidine) (POA) counter electrodes (CEs) were fabricated by potentiodynamic deposition and incorporated into platinum (Pt)‐free dye‐sensitized solar cells (DSSCs). A different sweep number had great impact on the morphology and electrocatalytic activity of the POA films. The POA film fabricated by 25 sweep cycles was observed to have a highly porous morphology, and this resulted in a lower charge‐transfer resistance of 57 cm2 in comparison with the Pt CE. The DSSC assembled with the POA CE showed a higher photovoltaic conversion efficiency of 1.67% compared to 1.2% for the DSSC with the Pt CE under full sunlight illumination. Therefore, the high active surface area of the 25‐sweep‐segmented POA film could be considered a promising alternative CE for use in DSSCs because of its high electrocatalytic performance and electrochemical stability. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42041.

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Preparation and characterization of poly(o‐anisidine) with the influence of surfactants on stainless steel by electrochemical polymerization as a counter electrode for dye‐sensitized solar cells

Menaka

Manisankar

Stalin

2015

J of Applied Polymer Sci

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Efficient fast electron transfer from counter electrode to an electrolyte is a key process during the operation of dyesensitized solar cells (DSSCs). We introduce a surfactants assisted electro-polymerized poly(o-anisidine) (POA) counter electrodes (CE) for DSSCs. Commencing the electrochemical impedance spectroscopy, the POA/sodium dodecyl sulphate (SDS) CE exhibited very low series and charge-transfer resistance. This is due to high electrocatalytic activity confirmed by cyclic voltammetry, surface area and the conductivity of the stainless steel film. The photovoltaic performance of POA/SDS counter electrode shows an energy conversion efficiency of 2.5% under 1 sun illumination. Short-term stability test for POA/SDS point out that CE have almost uphold its initial performance.

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Electro-synthesis and Characterization of Aniline and o- Anisidine Oligomers

Cited by 21 publications

References 61 publications

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

Electropolymerization of m‐Toluidin on Platinum Electrode from Aqueous Acidic Solution and Character of the Obtained Polymer

In situ electrochemical synthesis of a poly(o‐anisidine) counter electrode for a dye‐sensitized solar cell

Preparation and characterization of poly(o‐anisidine) with the influence of surfactants on stainless steel by electrochemical polymerization as a counter electrode for dye‐sensitized solar cells

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