Influence of Cathodic Pretreatment in the Electrocatalytic Properties PANI Modified Electrodes

2019 ◽  
Vol 31 (4) ◽  
pp. 766-770
Author(s):  
Nathália V. Barbosa ◽  
Estela P. Troiani ◽  
Quésia G. Silva ◽  
André S. Afonso ◽  
Ronaldo C. Faria
Keyword(s):  
Modified Electrodes ◽  
Electrocatalytic Properties ◽  
Cathodic Pretreatment

scholarly journals Synthesis of poly-Lysine/Gold nanoparticle films and their electrocatalytic properties

2011 ◽  
Vol 1 (4) ◽  
pp. 119-126 ◽  
Keyword(s):  
Gold Nanoparticles ◽  
Electron Transfer ◽  
Glassy Carbon ◽  
Electrochemical Impedance ◽  
Supporting Electrolyte ◽  
Phosphate Buffer Solution ◽  
Modified Electrodes ◽  
Buffer Solution ◽  
Transfer Constant ◽  
Electrocatalytic Properties

Films composed of citrate stabilized gold nanoparticles (AuNPs) and Poly-Lysine (pLys) were fabricated by electropolymerization on glassy carbon (GC) electrodes from 0.1M phosphate buffer solution at pH = 8. The films were topographically analyzed by atomic force microcopy whereas their electrocatalytic properties were studied by cyclic voltammetry and electrochemical impedance spectroscopy in aqueous solution using 0.0005M [Fe(CN)6] 3-/4- as redox probes and 0.1M NaClO4 as supporting electrolyte. The electron transfer process proved to be more efficient at the pLys-AuNP modified electrodes containing low amounts of gold nanoparticles (500 µL, 2.5×10-4M) than at the bare glassy carbon electrode. The heterogeneous electron transfer constant increased 2 orders of magnitude at the pLys-AuNP modified electrodes proving a more efficient electron transfer than at bare GC. These new films have a great potential for DNA biosensor applications.

Characterization and investigation of the electrocatalytic properties of poly-p-phenylene modified electrodes

1995 ◽  
Vol 384 (1-2) ◽  
pp. 19-23 ◽  
Author(s):  
Judith F. Rubinson ◽  
Shellie Neff ◽  
Harry B. Mark ◽  
Ahmed Galal ◽  
Nada F. Atta
Keyword(s):  
Modified Electrodes ◽  
Electrocatalytic Properties
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