The electrochemical behaviour of the copper-thallium composite film has been investigated in 10 mM NaOH solutions towards the electroreduction of nitrate and nitrite ions in the range of potentials between 0.0 and -1.4 V vs. SCE. The Cu45Tl55 binary films exhibited a higher electrocatalytic activity for the reduction of NO3- and NO2- than pure copper and thallium electrodeposited films. The presence of thallium species in the composite film causes a marked increase of the roughness factor with subsequent increase of the catalytic response due to the nitrate and nitrite reduction. Alternatively, thallium particles act as promoters of NO3- and NO2- adsorption on the electrode surface with their subsequent accumulation on the surface catalytic centres and increase of the cathodic currents.

ELECTROCATALYTIC REDUCTION OF NO3- AND NO2- ON COMPOSITE COPPER-THALLIUM ELECTRODE IN ALKALINE SOLUTIONS.

CASELLA, Innocenzo Giuseppe;
2004

Abstract

The electrochemical behaviour of the copper-thallium composite film has been investigated in 10 mM NaOH solutions towards the electroreduction of nitrate and nitrite ions in the range of potentials between 0.0 and -1.4 V vs. SCE. The Cu45Tl55 binary films exhibited a higher electrocatalytic activity for the reduction of NO3- and NO2- than pure copper and thallium electrodeposited films. The presence of thallium species in the composite film causes a marked increase of the roughness factor with subsequent increase of the catalytic response due to the nitrate and nitrite reduction. Alternatively, thallium particles act as promoters of NO3- and NO2- adsorption on the electrode surface with their subsequent accumulation on the surface catalytic centres and increase of the cathodic currents.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11563/2541
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