Electroless Preparation and Electrochemistry of Nickel-Pentacyanonitrosylferrate Film Modified Aluminum Electrode

Abstract

The use of aluminum substrate as an electrode and the modi®cation of its surface by means of the thin ®lm of nickel pentacyanonitrosylferrate (NiPCNF) was developed. The modi®cation conditions of aluminum surface including the electroless deposition of metallic nickel on the electrode surface from NiCl 2 NH 4 Cl solution and chemical derivatization of deposited nickel to NiPCNF ®lm in solution of 10 mM sodium pentacyanonitrosylferrate (PCNF) 0.5 M NaNO 3 0.03 M HNO 3 are described. The modi®ed Al electrode prepared under optimum conditions, shows a well-de®ned redox couple due to [Ni II Fe III/II (CN) 5 NO] 0/71 system. The effect of pH and radius of the hydrated alkali-metal cation of supporting electrolyte on the electrochemical characteristics of the modi®ed electrode were studied in detail. Diffusion coef®cients of alkali-metal cations in the ®lm (D),transfer rate constant for electron (k s ) and transfer coef®cient (a) were calculated. The electrocatalytic activity of the modi®ed electrode on the oxidation of hydrogen peroxide and ascorbic acid was demonstrated as a typical example of applications.

Approaches for multicopper oxidases in the design of electrochemical sensors for analytical applications

“…The low value of D ct could be associated with the microstructure of the coating interface formed (low porosity) [45]. It should be noticed that the obtained D ct value is comparable to other electrocatalytic coatings reported in the literature, i.e., nickel pentacyanonitrosylferrate [48], cobalt hexacyanoferrate [49], cobalt pentacyanonitrosylferrate [45] and ruthenium oxide hexacyanoferrate [50]. Hence, the time taken to reduce all copper centers incorporated into the film could be calculated by the equation (t = L 2 / D ct ) [50].…”

Application of a Palladium Hexacyanoferrate Film-Modified Aluminum Electrode to Electrocatalytic Oxidation of Hydrazine

“…34 In addition, we have reported the electroless preparation and electrochemistry of nickel pentacyanonitrosylferrate (NiPCNF)-coated Al electrode. 35 The NiPCNF|Al electrode was used for the electrooxidation of ascorbic acid, 36 thiosulfate, 37 hydrazine, 38 dopamine, 39 and iodide. 40 The electroless preparation of PdHCF film at the aluminum electrode was reported in the literature.…”

On the ability of metal-nitroprusside complexes as electrode modifiers: Characterization and electrochemical study of palladized aluminum electrode modified with iron pentacyanonitrosylferrate

“…Since 1993, when Gao and coworkers [9] prepared copper nitroprusside film modified GC electrode by electrodeposition method, metal nitroprusside complexes have received increased attention as electrode modifiers in the preparation of MPCNF modified electrodes. Up to now, preparation and application of various metal nitroprussides modified electrodes such as copper [9], nickel [8,10], palladium [11], cobalt [12], zinc [13], cadmium [14], lead [15], tin [16] and iron [17][18][19] have been reported.…”