An oxygen amperometric gas sensor based on its electrocatalytic reduction in room temperature ionic liquids

Oxygen reduction voltammetry on platinum macrodisk and screen-printed electrodes in ionic liquids: Reaction of the electrogenerated superoxide species with compounds used in the paste of Pt screen-printed electrodes?

“…Voltammetry for O 2 reduction has been widely reported in the literature in some (but not all) of these RTILs on glassy carbon (GC)/Au/Pt macro-, [22,25,26] Pt/Au/GC micro- [15,23,27,28] and Au microarray [29] electrodes, with similar voltammetric wave shapes to those observed in Figure 3. Table 2 shows the peak-to-peak separations (ΔE pp ) for the O 2 /O 2 -redox couple presented in Figure 3.…”

Room Temperature Ionic Liquids As Useful Overlayers for Estimating Food Quality from Their Odor Analysis by Quartz Crystal Microbalance Measurements

“…Thus, sensors designed to generate current responses and exploiting both gas permeable membranes 12,13 and membrane-free devices were developed, these last based on either solid polymer electrolytes (SPEs) [14][15][16] or room temperature ionic liquids (RTILs). [17][18][19][20][21][22][23] Unfortunately, these sensors provides responses for specific classes of VOCs alone, while flavors come out almost always from the contribution of different volatile species.…”

“…To achieve retention of volatile compounds, overlayers consisting of GC stationary phases displaying adsorption properties, 30 supramolecular compounds, 31 organic polymers, 32 biomolecules 33 or room temperature ionic liquids (RTILs) [17][18][19][20][21][22][23]28,29 have been employed. Among these, RTILs appear to be particularly attractive for their good thermal and electrical conductivity, negligible vapor pressure and ability to dissolve several compounds, thanks to their amphiphilic character which can be tuned by tailoring suitably their cations and anions.…”

“…Just these profitable properties have promoted their increasing use for several applications, such as organic synthesis, 34 chemical analysis, 35 GC separations 36 microextractions 37 and electrochemical gas sensing. [17][18][19][20][21][22][23][38][39][40] Moreover, they have been adopted as soft-coatings for QCM gas sensors planned for the detection of some organic volatile species at either room or high temperature. 29,41 In this paper we propose an array of QCM sensors filmed with different RTIL overlayers for the analysis of flavors with complex composition.…”

Physical and Electrochemical Investigations into Blended Electrolytes Containing a Glyme Solvent and Two Bis{(trifluoromethyl)sulfonyl}imide-Based Ionic Liquids

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Furthermore, the high (electro)chemical stabilities and non-volatilities exhibited by many IL structures provides interesting electrolyte media for electrochemical gas sensors (e.g. for O 2 , [16][17][18][19] CO 2 ,20,21 NO 2 22 ) where traditional solvents are prone to evaporation leading to device failure, and also for electromechanical actuator, [23][24][25] and electrodeposition applications. [26][27][28] Nevertheless, while the properties of ILs are dependent on the virtually unlimited combinations of different cation and anion structures, the attractive features are generally coupled with sluggish transport properties relative to conventional electrolytes based on either aqueous or organic solvents.…”