Electrocatalytic Reduction of HNO₂ by a Silicomolybdate Polyanion: A Differential Electrochemical Mass Spectrometry Study

Lignosulfonate‐Modified Electrode for Electrocatalytic Reduction of Acidic Nitrite

“…Unfortunately, the final product of nitrite reduction is currently unknown. Most probably it is NO, but N 2 O as the reduction product was also suggested for other chemically modified electrodes [20,21]. Figure 3A shows the typical amperometric trace of reducing current upon the addition of micromolar levels of standard nitrite solutions.…”

Dispersion effect of Cs-PW particles on multiwalled carbon nanotubes and their electrocatalytic activity on the reduction of bromate

“…They can accept and give certain number of electrons without decomposing, giving way to mix valance species that makes them very attractive in the area of electrocatalysis. They have been studied in many electrocatalytic reductions for their use as amperometric sensors of different analytes, such as: nitrate [1][2][3][4][5][6][7], bromate [2][3][4][5][6][7][8][9][10][11][12], chlorate [13], iodate [2,8,14], and hydrogen peroxide [2][3]7,[14][15][16]. Nevertheless, their solubility limits its application in solid state electrochemical devices.…”

“…This electrocatalytic effect is detected normally by the reduction current increase (Ired) and the oxidation current decrease (Iox) of the typical polyoxometalates redox processes. Nevertheless, it has been reported that when Iox does not decrease is due to free reduced POM not involved in the electrocatalytic process [1]. The reduction reactions that bromate ion follows would probably be:…”

“…It has been reported that the electroreduction of bromate takes place easily in the presence of a great diversity of polyoxometalates immobilized on carbon electrodes, such as: PMo 11 VO 40 [10], PMo 12 O 40 [6,9,12], SiMo 11 VO 40 [17], SiMo 12 O 40 [1,11], K 6 P 2 W 18 O 62 [4], P 2 Mo 18 O 62 [2,5], and SiNH 3 PW 12 O 40 [14]. This electrocatalytic effect is detected normally by the reduction current increase (Ired) and the oxidation current decrease (Iox) of the typical polyoxometalates redox processes.…”

“…Therefore, our work shows the study of the dispersion degree of Cs-PW particles (Cs 3 PW 12 O 40 ) as the polyoxometalate, through its immobilization on functionalized multiwalled carbon nanotubes (CNTs) to obtain hybrid materials, and test them as electrodes for the electrocatalysis of bromate ion. In order to carry out the bromate electroreduction, a great overpotential needs to be applied [1], * Corresponding author. Tel.…”