Voltammetry of Nitrate at Solid Cathodes

Abstract

In this work electrochemical kinetics of nitrate reduction was investigated on solid cathodes such as gold, titanium and aluminum. Enhancement of current density with increase in concentration of nitrate was observed with respect to the background in case of all electrode materials. The apparent electrochemical reaction order (14) for nitrate reduction was evaluated at various cathodes. The reaction order for the electro-reduction of nitrate at titanium showed dependence on electrode potential. Under the similar reactions conditions the electroreduction of nitrobenzene was also studied on the titanium electrode using cyclic voltammetry.

Electro-Reduction of Nitrobenzene at Titanium Cathode in SDS Aqueous Micellar Solution

“…Similarly when reduction is carried out at titanium electrode its oxide layer cause passivation of reaction and lowers the catalytic activity of the cathode in aqueous solution. So pre-treatment was applied for the removal of oxide layer from cathode surface before acquisition of the voltammograms, different polishing methods were used for the polishing of tarnished surface of cathode 24 where etching, was found best method for polishing of titanium surface. In this work etching was carried out with oxalic acid.…”

“…Previously we have studied the electrochemical reduction of nitrate at titanium electrode. 24 This work relates to electro-reduction of nitrobenzene at titanium cathode, 0.05 cm 2 , in the presence of miceller aqueous solution of sodium dodecyl sulphate, using titanium etching and cyclic voltammetric methods in a three-electrode system. Nitrobenzene gives single reduction peak corresponding to the irreversible electrochemical reduction shown in Fig.…”

Formation of Self Ordered TiO2 Nanotubes by Electrochemical Anodization of Titanium in 2-Propanol / NH4F

“…To understand the effect of electrolyte, 2-propanol/water system, on the kinetics of anodization reactions we need to consider the modified Arrhenius equation 42 :…”

Electroreduction of Nitrobenzene at Titanium Cathode in SDS Aqueous Micellar Solution

“…However, there are very few known studies so far in literature related to reduction of nitrobenzene at titanium cathode in aqueous media. Previously we have studied electrochemical reduction of nitrate at titanium cathode (10).…”