Irreversible electrostatic deposition of Prussian blue from colloidal solutions

Prussian blue (PB) can be deposited from colloidal solutions (5.4 × 10 −3  mol PB  L −1 , 0.01 mol L −1 KNO 3 ) on glassy carbon, either by potential cycling or potentiostatically, provided that the deposition potential is more positive than −0.2 V vs. Hg/Hg 2 Cl 2 . Depending on the deposition pote...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2011-12, Vol.15 (11-12), p.2461-2468
Main Authors: Cisternas, Regina, Muñoz, Eduardo, Henríquez, Rodrigo, Córdova, Ricardo, Kahlert, Heike, Hasse, Ulrich, Scholz, Fritz
Format: Article
Language:English
Subjects:
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Energy Storage
Original Paper
Physical Chemistry
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Summary:Prussian blue (PB) can be deposited from colloidal solutions (5.4 × 10 −3  mol PB  L −1 , 0.01 mol L −1 KNO 3 ) on glassy carbon, either by potential cycling or potentiostatically, provided that the deposition potential is more positive than −0.2 V vs. Hg/Hg 2 Cl 2 . Depending on the deposition potential, the PB particles form either a single layer of Everitt’s salt, of PB, or multilayers of Berlin green. Also depending on the electrode potential, the deposition was accompanied by currents which were either only of capacitive nature, or represent the sum of capacitive and faradaic currents. The currents were always limited by the diffusion of the colloidal particles to the electrode surface, i.e., they obeyed the Cottrell equation. The PB layers were characterized by in situ atomic force microscopy.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-011-1429-1