Preparation, Electrochemistry, and Electrocatalytic Activity of Lead Pentacyanonitrosylferrate Film Immobilized on Carbon Ceramic Electrode

Abstract

Lead pentacyanonitrosylferrate (PbPCNF), a new Prussian blue analog, was immobilized on the surface of a carbon ceramic electrode (CCE) prepared by sol-gel method. The immobilization process consists of adding a certain amount of metallic lead to the electrode matrix before gelation, and chemical derivatization of Pb on the electrode surface to a PbPCNF solid film by immersing the electrode in a solution of sodium pentacyanonitrosylferrate (PCNF). The composition of the synthesized PbPCNF was characterized by FTIR, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) techniques. The resulting modified electrode showed electroactivity at two redox centers. The electrochemical behavior of the PbPCNF modified carbon ceramic electrode (PbPCNF j CCE) was studied by cyclic voltammetry. Under optimized conditions the peak-to-peak separation is only 39 mV, indicative of a surface reaction. Ion effects of the supporting electrolyte suggest that cations have a considerable effect on the electrochemical behavior of the modified electrode. The transfer coefficient (a) and the charge transfer rate constant at the modifying film j electrode interface (k s ) were calculated. The electrocatalytic activity of the modified electrode toward the electro-reduction of peroxodisulfate was studied in details.

Electrochemical Detection of Persulfate at the Modified Glassy Carbon Electrode with Nanocomposite Containing Nano‐Ruthenium Oxide/Thionine and Nano‐Ruthenium Oxide/Celestine Blue

“…The proposed modified electrode showed stable and reproducible electrochemical behavior at a wide pH range (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The proposed modified electrode showed stable and reproducible electrochemical behavior at a wide pH range (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12).…”

“…Cyclic voltammograms of the GC/RuOx/CB electrode at various pH values (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12) were recorded ( Figure 6) to investigate the effect of pH on the redox response of the modified electrodes. As presented in the inset of Figure 6, the formal potential of the redox couple was pH dependent.…”

“…Past research has shown that persulfate may cause or aggravate diseases such as asthma [5] and skin reactions [6]. Several detection methods have recently been used for determination of persulfate [7,8]. Several detection methods have recently been used for determination of persulfate [7,8].…”

A highly sensitive persulfate sensor based on a hybrid nanocomposite with silicomolybdate doping poly(3,4-ethylenedioxythiophene) on multi-walled carbon nanotubes

“…Therefore, many studies have been performed for the quantitative determination of S 2 O 8 2À in recent years. 7,8 Some of these methods such as reductometric, 9,10 polarographic, [11][12][13] and spectrophotometric methods 14,15 have been criticized for time consumption, sample pre-treatment, and complicated procedures. Electrochemical methods [16][17][18][19][20] are under further investigation because of advantages such as functional simplicity, fast and selective response, and low cost.…”

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.…”