Pui Kee Lee | University of Malaya, Malaysia (original) (raw)
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Prussian blue-polypyrrole (PB-PPy) nanocomposite was deposited directly on glassy carbon electrod... more Prussian blue-polypyrrole (PB-PPy) nanocomposite was deposited directly on glassy carbon electrode (GCE) by self-assembly (SA) based on multiple sequential adsorption of FeCl 3-K 3 [Fe(CN) 6 ] and pyrrole. This approach offers easy preparation of electrodes, which allows control of its electrochemical behaviour and sensitivity towards hydrogen peroxide (H 2 O 2). PB-PPy nanocomposite was also electrodeposited in one-pot aqueous solution for the comparison purpose in terms of morphology and its electrochemical and electrocatalytic behaviours. Field-emission scanning microscope (FESEM) presented the morphology SA PB-PPy nanocomposites was irregular whereas electrodeposited PB-PPy was in nanocubic framework. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to study the electrochemical behaviour of fabricated PB-PPy films. The SA PB-PPy electrode with 10 deposition cycles demonstrated good sensing behaviour towards H 2 O 2 with good selectivity whereas capacitive property was observed when the deposition cycles increased to 20.
Prussian blue-polypyrrole (PB-PPy) nanocomposite was deposited directly on glassy carbon electrod... more Prussian blue-polypyrrole (PB-PPy) nanocomposite was deposited directly on glassy carbon electrode (GCE) by self-assembly (SA) based on multiple sequential adsorption of FeCl 3-K 3 [Fe(CN) 6 ] and pyrrole. This approach offers easy preparation of electrodes, which allows control of its electrochemical behaviour and sensitivity towards hydrogen peroxide (H 2 O 2). PB-PPy nanocomposite was also electrodeposited in one-pot aqueous solution for the comparison purpose in terms of morphology and its electrochemical and electrocatalytic behaviours. Field-emission scanning microscope (FESEM) presented the morphology SA PB-PPy nanocomposites was irregular whereas electrodeposited PB-PPy was in nanocubic framework. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were employed to study the electrochemical behaviour of fabricated PB-PPy films. The SA PB-PPy electrode with 10 deposition cycles demonstrated good sensing behaviour towards H 2 O 2 with good selectivity whereas capacitive property was observed when the deposition cycles increased to 20.