Activated carbon as a pseudo-reference electrode for potentiometric sensing inside concrete

Yawar Abbas, Farhad Pargar, Wouter Olthuis, Albert van den Berg

    Research output: Contribution to journalArticleAcademicpeer-review

    3 Citations (Scopus)
    95 Downloads (Pure)

    Abstract

    The half-cell potential of the Activated carbon (AC), due to its high double layer capacitance (EDL), remains stable in high ionic electrolyte. The open circuit potential (OCV) of the AC, with EDL of 40 – 50 F, shows a stable potential (10 mV variation) over two weeks in the cement pore solution (sat. Ca(OH)2). The OCV is less sensitive to the pH change from pH 8 to 12 (range inside concrete). The potentiometric response of a Ag/AgCl vs. AC pseudo-reference shows a near-Nernstian response (-51 mV/decade). The AC electrode can be proposed as a pseudo-reference for the potentiometric monitoring inside concrete.
    Original languageEnglish
    Pages (from-to)1437-1440
    JournalProcedia engineering
    Volume87
    DOIs
    Publication statusPublished - 2014

    Keywords

    • IR-97164
    • METIS-311670

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