About: Carbon electrodes modified by nanoscopic iron(III) oxides to assemble chemical sensors for the hydrogen peroxide amperometric detection     Goto   Sponge   NotDistinct   Permalink

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Description
  • Nanočástice různých forem oxidů železa (hematit, maghemit, amorfní Fe2O3, beta-Fe2O3 and ferrihydrit) inkorporované do uhlíkové pasty vykazují elektrokatalytické účinky pro redukci peroxidu vodíku. (cs)
  • In this study we show that nanoparticles of various ferric oxides (hematite, maghemitc, amorphous Fe2O3, beta-Fe2O3 and ferrihydrite) incorporated into carbon paste exhibit electro-catalytic properties towards hydrogen peroxide reduction. The modified paste electrode performances were evaluated and compared with those obtained with Prussian Blue-modified carbon paste electrode, which represents an excellent chemical mediator towards the H2O redox reaction (as widely described in literature). The best catalytic activity was found for carbon paste modified by amorphous ferric oxide with 2 - 4 nm particle size, which was further tested for possible application as hydrogen peroxide sensor. At pH 7, the limit of detection was 2 x 10(-5) M H2O2 (S/N = 3), the calibration curves were linear upto 8.5 mM H2O2 (R-2= 0.998), the measurement reproducibility (RSD = 97%, n = 4), the interelectrode reproducibility (RSD = 16%, n(electrodes) = 5) and < 3 s response time.
  • In this study we show that nanoparticles of various ferric oxides (hematite, maghemitc, amorphous Fe2O3, beta-Fe2O3 and ferrihydrite) incorporated into carbon paste exhibit electro-catalytic properties towards hydrogen peroxide reduction. The modified paste electrode performances were evaluated and compared with those obtained with Prussian Blue-modified carbon paste electrode, which represents an excellent chemical mediator towards the H2O redox reaction (as widely described in literature). The best catalytic activity was found for carbon paste modified by amorphous ferric oxide with 2 - 4 nm particle size, which was further tested for possible application as hydrogen peroxide sensor. At pH 7, the limit of detection was 2 x 10(-5) M H2O2 (S/N = 3), the calibration curves were linear upto 8.5 mM H2O2 (R-2= 0.998), the measurement reproducibility (RSD = 97%, n = 4), the interelectrode reproducibility (RSD = 16%, n(electrodes) = 5) and < 3 s response time. (en)
Title
  • Carbon electrodes modified by nanoscopic iron(III) oxides to assemble chemical sensors for the hydrogen peroxide amperometric detection
  • Carbon electrodes modified by nanoscopic iron(III) oxides to assemble chemical sensors for the hydrogen peroxide amperometric detection (en)
  • Uhlíkové elektrody modifikované nanočásticemi Fe2O3 jako chemické senzory pro detekci peroxidu vodíku (cs)
skos:prefLabel
  • Carbon electrodes modified by nanoscopic iron(III) oxides to assemble chemical sensors for the hydrogen peroxide amperometric detection
  • Carbon electrodes modified by nanoscopic iron(III) oxides to assemble chemical sensors for the hydrogen peroxide amperometric detection (en)
  • Uhlíkové elektrody modifikované nanočásticemi Fe2O3 jako chemické senzory pro detekci peroxidu vodíku (cs)
skos:notation
  • RIV/61989592:15310/07:00004706!RIV08-MSM-15310___
http://linked.open.../vavai/riv/strany
  • 1850-1854
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1M0512), Z(MSM6198959218)
http://linked.open...iv/cisloPeriodika
  • 17
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 412621
http://linked.open...ai/riv/idVysledku
  • RIV/61989592:15310/07:00004706
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • nanoparticles; ferric oxide; iron oxide; hydrogen peroxide; sensors; biosensors; modified electrodes (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [1CDE3FEE62E9]
http://linked.open...i/riv/nazevZdroje
  • Electroanalysis
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 19
http://linked.open...iv/tvurceVysledku
  • Zbořil, Radek
  • Hrbáč, Jan
  • Halouzka, Vladimír
  • Papadopoulos, Kyriakos
  • Triantis, Theodor
http://linked.open...n/vavai/riv/zamer
issn
  • 1040-0397
number of pages
http://localhost/t...ganizacniJednotka
  • 15310
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