The electrochemical properties of a platinum electrode in functionalized room temperature imidazolium ionic liquids

Disclosure of the imidazolium cation coordination and stabilization mode in ionic liquid stabilized gold(0) nanoparticles

“…This provided a strong evidence that the ether tail was directed away from the GNP/GNP aggregate surface (Fig. 4), which is in agreement with the previously observed arrangement of imidazolium ILs at an electrode surface [41,53]. As a consequence, this increases the mean distance between the GNPs/GNP aggregates, resulting in a strongly diminished attractive van der Waals forces as these decay exponentially with the distance between the NPs [52].…”

Investigation of double-layer and pseudocapacitance of surface-modified ionic liquid-functionalized graphene oxide

“…More specifically, we can hypothesize that the ionic liquid and its counterion participate in faradaic charge transfer processes at the electrode/electrolyte interface. Similar behavior in room temperature ionic liquids has been reported previously [48], although the potentials at which these reversible charge transfer processes occur on our materials are different because the ionic liquid is now attached to the graphene oxide, and interacts with the aqueous electrolyte and likely with the oxygen-containing functional groups on the IFGO surface. Additional support for faradaic charge-transfer processes in ionic liquid-functionalized graphene has been reported by Ai and co-workers [49], indicating that ionic liquids, when covalently bound to a solid support, may interact with the support surface and the electrolyte and participate in reversible or quasireversible redox reactions, similar to what we see in our present study.…”

Task-Specific Ionic Liquids for Electrochemical Applications

“…Due to the lower viscosities of ether-functionalized ILs, these liquids tend to have higher specifi c conductivities at 25 [ 23 ]. Another excellent example was illustrated by Donato et al [ 50 ] as: [Me(OCH 2 CH 2 ) 3 25 °C). The same conductivity increase trend was observed for ether-functionalized ILs based on imidazolium cations [ 38 ], pyrrolidinium, piperidinium, oxazolidinium, or morpholinium cations [ 24 ], phosphonium and ammonium cations [ 25 , 51 , 52 ], as well as guanidinium cations [ 53 , 54 ].…”

“…The electrochemical stability is also affected by the incorporation of ether groups. Grafting one or multiple short-chain ether groups in quaternary ammonium, cyclic quaternary ammonium, or sulfonium ILs generally leads to reduced electrochemical stability, but with the electrochemical windows still being suffi ciently high (usually >4.0 V) for practical uses as electrolytes [ 23 -26 , 28 , 51 , 57 , 59 ] [ 50 ]. Chen et al [ 52 ] argued that the incorporation of a second alkoxy group to the quaternary ammonium cation caused no negative impact on the electrochemical stability of the resulting ILs.…”