The rhodium particles can be electrodeposited on a glassy carbon electrode, previously modified with multi-walled carbon nanotubes (MWCNTs), by voltage cycling between 0.4 V and-0.3 V vs. SCE (30 cycles) in 50 mM H 2SO4 containing 4.0 mM RhCl3. This proposed modified electrode is useful to facilitate the electrocatalytic reduction of nitrate and nitrite ions in acid medium. The mechanism of the electrocatalytic reduction of nitrate and nitrite ions in the hydrogen region of potentials was critically considered using voltammetric and DC/pulsed amperometric detection techniques. The GC/MWCNT-Rh electrode shows interesting sensitivity and temporal reproducibility towards nitrite and nitrate reduction under constant and pulsed applied potentials, respectively

HIGHLY DISPERSED RHODIUM PARTICLES ON MULTI-WALLED CARBON NANOTUBES FOR THE ELECTROCHEMICAL REDUCTION OF NITRATE AND NITRITE IN ACID MEDIUM

CASELLA, Innocenzo Giuseppe;CONTURSI, Michela
2014-01-01

Abstract

The rhodium particles can be electrodeposited on a glassy carbon electrode, previously modified with multi-walled carbon nanotubes (MWCNTs), by voltage cycling between 0.4 V and-0.3 V vs. SCE (30 cycles) in 50 mM H 2SO4 containing 4.0 mM RhCl3. This proposed modified electrode is useful to facilitate the electrocatalytic reduction of nitrate and nitrite ions in acid medium. The mechanism of the electrocatalytic reduction of nitrate and nitrite ions in the hydrogen region of potentials was critically considered using voltammetric and DC/pulsed amperometric detection techniques. The GC/MWCNT-Rh electrode shows interesting sensitivity and temporal reproducibility towards nitrite and nitrate reduction under constant and pulsed applied potentials, respectively
2014
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11563/94295
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