Coated Electrode
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Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 305
Author(s):  
Anwar ul Haq Ali Shah ◽  
Sadaf Zia ◽  
Gul Rahman ◽  
Salma Bilal

Electronically conducting poly (aniline-co-2-hydroxyaniline) (PACHA), a copolymer of aniline and 2-hydroxyaniline (2HA), was electrochemically coated on gold substrate for methanol electrooxidation in alkaline media. The electrochemical behavior of PACHA coated gold electrode towards methanol electrooxidation was investigated via cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) for application in an alkaline fuel cell. Methanol electrooxidation was observed at two different electrode potentials depending on the concentration of the base. At the PACHA coated gold electrode, the methanol oxidation peak was observed at lower overpotential (at 0.19 V) in a solution of high base concentration (1.8 M NaOH), which was 30 mV lower than the peak for the uncoated gold electrode. In addition, the Faradic current Imax obtained on the PACHA coated electrode (20 mA) was two times higher as compared to the Faradic current Imax of the un-modified gold electrode (10 mA). In solution of lower base concentration (0.06 M NaOH), the electrooxidation of methanol became sluggish on both electrodes, as indicated by peak shifting towards positive potential and with reduced faradaic current (at 0.74 V on PACHA coated electrode; Imax 10 mA). The electrooxidation of methanol at both lower and higher electrode potentials was analyzed mechanistically and discussed in light of the literature. EIS results were interpreted using Nyquist and Bode plots. The charge transfer resistance was decreased and pseudo-capacitive behavior changed to conductive behavior when external applied potential was increased from 0.1 V to 0.4 V.


2022 ◽  
Vol 35 (2) ◽  
pp. 276-282
Author(s):  
H. Phan Nguyen ◽  
N. Vu Ngo ◽  
C. Tam Nguyen
Keyword(s):  

Author(s):  
Jyoti . ◽  
Renata Rybakiewicz ◽  
Teresa Zolek ◽  
Dorota Maciejewska ◽  
Edyta Gilant ◽  
...  

An electrochemical chemosensor for cilostazol (CIL) determination was devised, engineered, and tested. For that, a unique conducting film of the functionalized thiophene-appended carbazole-based polymer, molecularly imprinted with cilostazol (MIP-CIL), was...


2021 ◽  
Vol 43 (4) ◽  
pp. 524-534
Author(s):  
S. Shirguppikar ◽  
M.S. Patil ◽  
N.H. Phan ◽  
T. Muthuramalingam ◽  
P.V. Dong ◽  
...  

2021 ◽  
Author(s):  
Sedigheh Aghayari

Abstract In recent years piezoelectric nanogenerators, due to their more durability in high dust or humidity are more attractive than triboelectric ones. So, increasing their outputs is the subject of much researches. I focused on electrodes of the acoustic nanofibers nanogenerators for the first time. Here, I introduced a new electrode that is cheaper and does not result in lower outputs. Here for the first time graphene spin-coated ink was used for polyacrylonitrile-based acoustic nanogenerator. The results of the tests compared with the in-situ synthesis of nickel nanoparticles on the layer and using graphene spin-coated screen ink and conductive tapes. Finally, producing sound by this graphene ink was done too.


2021 ◽  
Vol 161 ◽  
pp. 106470
Author(s):  
N. Veni Keertheeswari ◽  
Suba Lakshmi Madaswamy ◽  
Saikh Mohammad Wabaidur ◽  
Mohamed A. Habila ◽  
Murefah Mana Al-Anazy ◽  
...  

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