Electrochemical reduction of NO2 at a Pt/membrane electrode—Application to amperometric NO2 sensing

Performance Recovery after Contamination with Nitrogen Dioxide in a PEM Fuel Cell

“…In these cases, the result from Mohtadi et al [9] was partially recovered cell performance, while the result from Uribe et al [5] was fully recovered performance. The difference of these two recovery processes was that Mohtadi et al [9] operated the cell in the range of 0.68-0.7 V and Uribe et al [5] at 0.5 V. Our previous results [4], in agreement with the results of Chen et al [10] and Lin et al [11], showed that, at lower potentials in the negative sweep, reduction of nitrite occurs, and thus it is removed from the Pt-catalyst. Higher concentrations were tried by Yang et al [7] (10, 140, and 1480 ppm) and Misz et al [6] (10 and 15 ppm), in which performance recovery was almost reached in all of the cases after approximately 1 h with NO 2 .…”

Novel scheme to improve SnO2/SAW sensor performance for NO2 gas by detuning the sensor oscillator frequency

“…Different sensing techniques have been used for the detection of NO 2 gas like Chemiresistive, Electrochemical, Optical, Acoustic, Chromatography, etc. [1,[4][5][6][7]. However surface acoustic wave (SAW) is the most suitable technique for the detection of toxic gases because of high sensitivity, fast response speed, good reliability, low cost, real time measurement and wireless sensing in inaccessible areas [8].…”

Fundamentals, rational catalyst design, and remaining challenges in electrochemical NO reduction reaction

“… 26 However, this process is often fraught with challenges as it tends to produce residual nitrogen-containing compounds such as NO 2 , N 2 , N 2 O, and N 2 H 4 , which not only impede the overall efficiency of the reaction but also contribute to environmental pollution. 23 , 27 , 28 , 29 , 30 , 31 The slow reaction kinetics resulting from gaseous NO’s low solubility in aqueous electrolytes and the concurrent hydrogen evolution reaction (HER) pose fundamental obstacles to NO x RR. 29 , 32 Regrettably, electrocatalytic NO x RR techniques suffer from relatively low NH 3 yield and selectivity.…”