Preparation, characterization, and electrocatalytic oxidation properties of iron, cobalt, nickel, and indium hexacyanoferrate

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 521; no. 1; pp. 29 - 52
• Main Author: Chen, S.-M.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 08-03-2002; Elsevier Science
• Subjects: Chemistry; Electrocatalysis; Electrochemistry; Exact sciences and technology; General and physical chemistry; Kinetics and mechanism of reactions; Metal hexacyanoferrates; Modified electrodes; Oxidation; Metal hexacyanoferrates; Electrocatalysis; Modified electrodes; Oxidation; Films; Catalytic reaction; Thiosulfates; Nickel Hexacyanoferrates; Transition metal Compounds; Carbon electrode; Experimental study; Iron Hexacyanoferrates; Cyclic voltammetry; Inorganic anion; Cobalt Hexacyanoferrates; Electrode reaction; Oxidative degradation; Crystal electrode; Indium Hexacyanoferrates; Reaction mechanism; Kinetic parameter; Electrochemical reaction; Catalyst activity; Modified material
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/S0022-0728(02)00677-0

Using consecutive cyclic voltammetry, iron(II), cobalt(II), nickel(II), and indium(III) hexacyanoferrate films have been prepared, and their electrocatalytic properties in electrolytes containing various cations have been determined. Cyclic voltammograms recorded the electrochemical formation of nickel(II) hexacyanoferrate films using 13 cations: Li
+, Na
+, K
+, Rb
+, Cs
+, Mg
2+, Ca
2+, Sr
2+, Ba
2+, H
+, NH
4
+, tetraethylammonium cation, and Al
3+. The electrochemical formation of the iron(II), indium(III), and cobalt(II) hexacyanoferrate films from different cation solutions with the same concentration showed different cyclic voltammograms. The deposition growth of the cobalt(II) and nickel(II) hexacyanoferrates in aqueous Ca(NO
3)
2 and Ba(NO
3)
2 solutions immersed in various aqueous cation solutions were consistent with the EQCM and spectroscopic data. The electrocatalytic oxidation of SO
3
2− and S
2O
3
2− by various metal hexacyanoferrate film catalysts in electrolytes of various cations showed some selectivity towards several cations and also showed varying redox potentials.