On the kinetics of the nitrate reduction in concentrated nitric acid

The autocatalytic mechanism involved in the reduction reaction of nitrate in 8M nitric acid solution was investigated in order to propose a complete description of all processes taking place at the interface. A time and potential independent current plateau was observed for low scan rates and was as...

Full description

Saved in:
Bibliographic Details
Published in:Electrochemistry communications 2013-04, Vol.29, p.25-28
Main Authors: Lange, Ronny, Maisonhaute, Emmanuel, Robin, Raphaël, Vivier, Vincent
Format: Article
Language:English
Subjects:
Autocatalysis
Chemical Sciences
Chemistry
Chronoamperometry
Electrochemistry
Exact sciences and technology
General and physical chemistry
Kinetics and mechanism of reactions
Nitrate reduction
Nitric acid
Other
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The autocatalytic mechanism involved in the reduction reaction of nitrate in 8M nitric acid solution was investigated in order to propose a complete description of all processes taking place at the interface. A time and potential independent current plateau was observed for low scan rates and was ascribed to limitation by the desorption of NOads. Data analysis and fit of the experimental chronoamperogram allowed determination of the kinetic constants of the autocatalytic cycle. [Display omitted] ► The investigation of the autocatalytic mechanism of the reduction of concentrated nitric acid on platinum is reported. ► A simplified mechanism involving adsorbed intermediate was shown to accurately describe the the chronoamperometric response. ► It is demonstrated that desorption of NO limits the current to the nevertheless extremely high value of 1A.cm−2.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2013.01.005