1,1'-Bis(11-mercaptoundecyl)ferrocene for potentiometric sensing of H+ ion in sulfuric acid media simulating lead acid battery electrolyte

T.B. Issa, P. Singh, Murray Baker, B.S. Verma

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The measurement of state of charge of a lead-acid battery by remotely monitoring H+ ion concentration of the battery electrolyte potentiometrically is much more attractive than the labour intensive method of measuring specific gravity of the electrolyte. Unfortunately, the traditional H+ potentiometric sensors such as the glass electrode cannot be used in the concentrated sulfuric acid battery electrolyte. This paper describes our work on the possibility of using 1,1'-bis(11-mercaptoundecyl)ferrocene Fc(C11SH)(2) for measuring changes in the hydrogen ion concentration with a view to developing a miniaturized battery state of charge determining device. A cyclic voltammetric study of the electrochemical response and chemical stability of the alkanethiol ferrocene derivative redox couple is discussed. It is found that the oxidation peak potential of the investigated ferrocene is independent of pH in the range 2-10. However, in concentrated sulfuric acid media 1-5 M, which is more relevant to the targeted application, the oxidation peak shifts linearly to less positive potentials as a function of the acid concentration. The promise of this observation for determining state of charge of lead-acid batteries is explored.
Original languageEnglish
Pages (from-to)921-924
JournalJournal of Applied Electrochemistry
Volume31
Issue numbern/a
DOIs
Publication statusPublished - 2001

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Lead acid batteries
Sulfuric acid
Electrolytes
Ions
pH
Potentiometric sensors
Oxidation
Chemical stability
Density (specific gravity)
Personnel
Derivatives
Glass
Electrodes
Acids
Monitoring
sulfuric acid
ferrocene

Cite this

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title = "1,1'-Bis(11-mercaptoundecyl)ferrocene for potentiometric sensing of H+ ion in sulfuric acid media simulating lead acid battery electrolyte",
abstract = "The measurement of state of charge of a lead-acid battery by remotely monitoring H+ ion concentration of the battery electrolyte potentiometrically is much more attractive than the labour intensive method of measuring specific gravity of the electrolyte. Unfortunately, the traditional H+ potentiometric sensors such as the glass electrode cannot be used in the concentrated sulfuric acid battery electrolyte. This paper describes our work on the possibility of using 1,1'-bis(11-mercaptoundecyl)ferrocene Fc(C11SH)(2) for measuring changes in the hydrogen ion concentration with a view to developing a miniaturized battery state of charge determining device. A cyclic voltammetric study of the electrochemical response and chemical stability of the alkanethiol ferrocene derivative redox couple is discussed. It is found that the oxidation peak potential of the investigated ferrocene is independent of pH in the range 2-10. However, in concentrated sulfuric acid media 1-5 M, which is more relevant to the targeted application, the oxidation peak shifts linearly to less positive potentials as a function of the acid concentration. The promise of this observation for determining state of charge of lead-acid batteries is explored.",
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language = "English",
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pages = "921--924",
journal = "Journal of Applied Electrochemistry",
issn = "0021-891X",
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1,1'-Bis(11-mercaptoundecyl)ferrocene for potentiometric sensing of H+ ion in sulfuric acid media simulating lead acid battery electrolyte. / Issa, T.B.; Singh, P.; Baker, Murray; Verma, B.S.

In: Journal of Applied Electrochemistry, Vol. 31, No. n/a, 2001, p. 921-924.

Research output: Contribution to journalArticle

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AU - Verma, B.S.

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AB - The measurement of state of charge of a lead-acid battery by remotely monitoring H+ ion concentration of the battery electrolyte potentiometrically is much more attractive than the labour intensive method of measuring specific gravity of the electrolyte. Unfortunately, the traditional H+ potentiometric sensors such as the glass electrode cannot be used in the concentrated sulfuric acid battery electrolyte. This paper describes our work on the possibility of using 1,1'-bis(11-mercaptoundecyl)ferrocene Fc(C11SH)(2) for measuring changes in the hydrogen ion concentration with a view to developing a miniaturized battery state of charge determining device. A cyclic voltammetric study of the electrochemical response and chemical stability of the alkanethiol ferrocene derivative redox couple is discussed. It is found that the oxidation peak potential of the investigated ferrocene is independent of pH in the range 2-10. However, in concentrated sulfuric acid media 1-5 M, which is more relevant to the targeted application, the oxidation peak shifts linearly to less positive potentials as a function of the acid concentration. The promise of this observation for determining state of charge of lead-acid batteries is explored.

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