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

Y. Abbas, Farhad Pargar, W Olthuis, A. van den Berg

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

3 Citations (Scopus)
21 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
Title of host publicationEUROSENSORS 2014, the 28th European Conference on Solid-State Transducers
EditorsGiorgio Sberveglieri, Vittorio Ferrari
PublisherElsevier
Pages1437-1440
Volume87
DOIs
Publication statusPublished - 2014
Event28th European Conference on Solid-State Transducers - Brescia, Italy
Duration: 7 Sep 201410 Sep 2014
Conference number: 28

Publication series

NameProcedia Engineering
PublisherElsevier
Volume87
ISSN (Electronic)1877-7058

Conference

Conference28th European Conference on Solid-State Transducers
Abbreviated titleEUROSENSORS 2014
CountryItaly
CityBrescia
Period7/09/1410/09/14

Keywords

  • Activated carbon
  • open circuit potential
  • pseudo-reference electrode
  • potentiometric measurement
  • concrete structures

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