Activated Carbon as a Pseudo-reference Electrode for Potentiometric Sensing Inside Concrete | Zendy

Yawar Abbas | Zendy; Farhad Pargar | Zendy; Wouter Olthuis | Zendy; Albert van den Berg | Zendy

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Activated Carbon as a Pseudo-reference Electrode for Potentiometric Sensing Inside Concrete

Author(s) -

Yawar Abbas,

Farhad Pargar,

Wouter Olthuis,

Albert van den Berg

Publication year - 2014

Publication title -

procedia engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.32

H-Index - 74

ISSN - 1877-7058

DOI - 10.1016/j.proeng.2014.11.717

Subject(s) - potentiometric titration , electrode , materials science , carbon fibers , activated carbon , reference electrode , composite material , chemistry , electrochemistry , organic chemistry , composite number , adsorption

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 (10mV 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 (-51mV/decade). The AC electrode can be proposed as a pseudo-reference for the potentiometric monitoring inside concrete

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