Temperature effects on amperometric detection at nickel oxide electrodes in flow-injection systems

Hui, Ben S.; Huber, C. O.

doi:10.1016/s0003-2670(00)84751-0

Cited by 9 publications

(1 citation statement)

References 6 publications

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“…A similar correlation between anodic O-transfer reactivity and decreased net overpotential for O2 evolution has been observed for Bi(V)-doped ~-PbO2 film electrodes) These results are in agreement with the conclusion that the rate-controlling step in anodic O-transfer reaction is the discharge of H20. 10 Visual inspection of the data in Fig. i reveals that net voltammetric response for ethylamine, i.e., total response minus the residual response, is peak shaped for all film compositions. As a result of the peaked response, the net current for ethylamine at E >> 1.0 V is only slightly larger than the residual current resulting from anodic discharge of H20 with evolution of 02.…”

Section: Resultsmentioning

confidence: 95%

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Ge¹,

Johnson²

1995

J. Electrochem. Soc.

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Results are described from research directed to the discovery of new anode materials suitable for obtaining stable and sensitive response when applied at constant potential for the amperometric detection of organic amines. Voltammetric and amperometric results are compared for detection of selected organic amines in carbonate buffer (pH 10) at mixed silver-lead oxide films prepared by electrodeposition on platinum substrates and by anodization of Ag-Pb alloys. Anodic response is observed at both electrodes for ethylamine, N-ethylmethylamine, trimethylamine, ethanolamine, and L -alanine. However, data indicate that the oxide electrode formed by anodization of Ag-Pb alloys is superior with regard to stability of response. On the basis of flow-injection detection using constant applied potential in carbonate buffer, linear dynamic ranges (r 2 > 0.99) are at least three decades for selected primary, secondary, tertiary, alkanolamine, and amino acids in carbonate buffer (pH i0), with detection limits (S/N = 3) of ca. 0.3 ~M (i.e., 6 pmol per 20 ~l injection). Results are presented for the characterization of these films using x-ray diffractometry, x-ray photoelectron spectroscopy, and scanning electron microscopy.

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Section: Resultsmentioning

confidence: 95%

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Ge¹,

Johnson²

1995

J. Electrochem. Soc.

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Electroanalysis with electrodes modified by inorganic films

1991

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Electrode modification with a poly(Ni^II‐tetramethyldibenzotetraaza[14]annulene) film. Electrochemical behavior and redox catalysis in alkaline solutions. I

1995

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The voltammetric behavior in alkaline solution of a nickel-based chemically modified electrode (Ni-CME) prepared by oxidative electropolymerization of a nickel-tetraazaannulene complex (Ni"L) was investigated. After electrochemical deposition of the (Ni"L), film in dichloromethane on a conducting substrate, the modified electrode was continuously cycled in alkaline solution until a steady voltammetric profile was obtained. Although upon electrochemical treatment in basic solutions the nickel-nitrogen tetracoordination of the (NiI'L), film is probably lost, the nickel species remain entrapped inside the polymeric skeleton and exhibit stable redox behavior resembling that of the nickel hydroxide ele'ctrode. This makes it possible to prepare very thin films of nickel-based modified electrodes. In cyclic voltammetry experiments the Ni-CME exhibits a pH dependence of the peak potentials typical of the a-Ni (OH)2/y-NiOOH redox process, and a separation between anodic and cathodic peak potentials of 64mV at pH 13.2 and 10 mV s-'. The redox catalysis at Ni-CMEs of representative compounds that are not easily electrooxidized, such as choline, cadaverine, y-amino butyric acid (GABA), benzyl alcohol, and glycine, is demonstrated. The good stability of these nickel-based modified electrodes makes them attractive in analytical applications.

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Temperature effects on amperometric detection at nickel oxide electrodes in flow-injection systems

Cited by 9 publications

References 6 publications

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Electroanalysis with electrodes modified by inorganic films

Electrode modification with a poly(Ni^II‐tetramethyldibenzotetraaza[14]annulene) film. Electrochemical behavior and redox catalysis in alkaline solutions. I

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Temperature effects on amperometric detection at nickel oxide electrodes in flow-injection systems

Cited by 9 publications

References 6 publications

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Electrocatalysis of Anodic Oxygen‐Transfer Reactions: Aliphatic Amines at Mixed Silver‐Lead Oxide‐Film Electrodes

Electroanalysis with electrodes modified by inorganic films

Electrode modification with a poly(NiII‐tetramethyldibenzotetraaza[14]annulene) film. Electrochemical behavior and redox catalysis in alkaline solutions. I

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Product

Resources

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Electrode modification with a poly(Ni^II‐tetramethyldibenzotetraaza[14]annulene) film. Electrochemical behavior and redox catalysis in alkaline solutions. I