Electrochemical behavior of Ni(II)/Ni in a hydrophobic amide-type room-temperature ionic liquid

Liquid Nickel Salts: Synthesis, Crystal Structure Determination, and Electrochemical Synthesis of Nickel Nanoparticles

“…[73] Electrochemical synthesis of nickel nanoparticles without at emplate has been described before by Reetz et al [74,75] although their systems are highly dependent on metal concentrationa nd the presence of stabilizers, which does not seem to be the case for our liquid nickel salts. Katayama et al [76][77][78][79][80][81] reported the electrochemical synthesis of nanoparticles of silver, [76] nickel, [77,78] iron, [79] cobalt, [80] and palladium. [81] They dissolved transition metal salts with bis(trifluoromethanesulfonyl)imidea nions in the ionic liquid [ [77,78] but they found that at longerp lating times and larger overpotentials the color of the ionic liquid darkened and nickel nanoparticles were dispersed in the liquid.…”

“…Katayama et al [76][77][78][79][80][81] reported the electrochemical synthesis of nanoparticles of silver, [76] nickel, [77,78] iron, [79] cobalt, [80] and palladium. [81] They dissolved transition metal salts with bis(trifluoromethanesulfonyl)imidea nions in the ionic liquid [ [77,78] but they found that at longerp lating times and larger overpotentials the color of the ionic liquid darkened and nickel nanoparticles were dispersed in the liquid. [79] The cyclic voltammogramst hey measured weres imilart othe ones presented in this work (i.e.,l arge overpotential for the reduction of the metal and ap rocess that is not fully reversible).…”

“…[83] This stabilization by bistriflimide also inhibits further growth of the particles according to Katayamae tal. [76][77][78][79][80][81] It has been known for quite some time that organic moieties can adsorb to as urface, as was determined by thin-layer coulometry, [84] and surfacee nhanced Raman spectroscopy (SERS). [85,86] Only since quite recently,t here has been interest in the surface structurea tt he ionic liquid-metale lectrode interface.…”

“…[99,100] Therefore, once theseN ia datoms, formed at the edge of the solvationl ayer,c lustert of orm nanoparticles of acertain size, they can be stabilized by the N-hexylimidazole ligandsa nd possibly by the bis(trifluoromethanesulfonyl)imide anions. [76][77][78][79][80][81]83] Thereafter,t he stabilized nanoparticles are gradually dispersed into the bulk liquid metal salt.…”

Deposition and Dissolution of Lithium through Lithium Phosphorus Oxynitride Thin Film in Lithium Bis(trifluoromethylsulfonyl)amide-Glyme Solvate Ionic Liquid

“…The Electrochemical Society of Japan http://dx.doi.org/10.5796/electrochemistry.83.846 Figure 1 shows the linear sweep voltammograms of the Ni electrodes with and without LiPON in the 50-50 mol% LiTFSA-G3 solvate ionic liquid at 298 K. The anodic current at the Ni electrode without LiPON monotonically increased above 5.0 V. This anodic current can be assigned to the oxidative decomposition of the 50-50 mol% LiTFSA-G3 solvate ionic liquid 6 and/or the anodic dissolution of Ni to Ni(II). 31 In contrast, the anodic current was hardly observed on the Ni electrode with LiPON at the potential higher than 5.0 V, indicating the high anodic stability of LiPON 19 and the ability of LiPON to block the electron transfer between the Ni electrode and the LiTFSA-G3 solvate ionic liquid. This result also indicated the Ni electrode was fully covered with LiPON.…”