DOI QR코드

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Nano-Ruthenium Oxide Polymeric Composite pH Electrodes

나노 Ruthenium Oxide 고분자 복합재료 pH전극

  • Received : 2018.05.15
  • Accepted : 2018.06.06
  • Published : 2018.08.20

Abstract

Surface renewable nano-$RuO_2$/poly(methyl methacrylate) polymeric composite pH electrodes were prepared. The composite electrode with 53 wt% of nano-$RuO_2$ showed similar good response characteristics to nano-$IrO_2$ composite electrode reported earlier. It showed response slope of -58.7 mV/pH, response time of <1 s, surface renewability of $-57.0{\pm}0.3mV/pH$ (n=5) and long time stability for a month as well as low interferences but high interferences by electrochemically active species like $I^-$ and $Fe(CN){_6}^{3-}$. However, the response slope and time became worse at higher pH than 9 compared to those of nano-$IrO_2$ composite electrodes possibly due to the difference of physical properties resulting from higher content of nano-$RuO_2$ in polymeric composite matrix.

Keywords

pH electrode;Composite electrode;Nano-ruthenium oxide

Acknowledgement

Supported by : 건국대학교

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