Electrochemical reactivity and stability of platinum nanoparticles in imidazolium-based ionic liquids

Abstract

The electrocatalytic activity of synthesized quasi-spherical Pt nanoparticles (NPs) have been studied taking as a model the CO ads electrooxidation reaction in two imidazolium-based ionic liquids such as 1-

Electrocatalytic studies on imidazolium based ionic liquids: defining experimental conditions

“…Experimental conditions for properly studying electrocatalytic reactions at nanoparticulated electrodes in aqueous media are well established in the literature [25][26][27]. Nevertheless, the relevant effect in RTILs electrochemical behavior of several experimental factors, which include temperature, water content and level of impurities [28][29][30][31] requires a strict control of those parameters. Usually, RTILs employed in electrocatalysis are chemically stable in the presence of air and moisture.…”

“…Nevertheless, water absorbed remains as the most common impurity present in RTILs, since even hydrophobic RTILs absorb some. Thus, the presence of water and O 2 within the RTILs provoke a relevant impact on the electrochemical response of most electrode materials, and particularly in Pt electrodes [31] due to its high catalytic activity. In spite of the fact that the number of publications devoted to study electrochemical reactions in RTILs is constantly growing, very few of them have [28][29][30].…”

Characterization of the interfaces between Au(hkl) single crystal basal plane electrodes and [Emmim][Tf 2 N] ionic liquid

“…Such applications take advantage of its ability to perform processes that could not be possible in aqueous solutions thanks to its increased thermal stability, particular interaction with some reactants and low vapor pressure. Being composed entirely of ions, RTIL have many electrochemical applications in electrocatalysis, electrodeposition or as solvent in energy devices (batteries and supercapacitors) [3][4][5][6].…”

Ionic liquid modified Pt/C electrocatalysts for cathode application in proton exchange membrane fuel cells

“…Due to the high viscosity and cluster size changing of ILs, their initial dispersion in solvent will significantly affect the solution properties and thus their surface modification behaviour over catalysts [11][12][13][14][15]. Following former knowledge obtained by other researchers [3][4][5][6]12,[16][17][18][19], the IL coating was first conducted to Pt/C catalysts with initial concentrations between 1% and 10% by 2 times surface modification process. SEM imaging analysis was conducted to observe the surface morphology of GDEs fabricated from Pt/C and Pt/C@IL catalysts to understand the influence of IL surface modification on the final electrode fabrication (Fig.…”