The crucial role of electron transfer from interfacial molecules in the negative potential shift of Au electrode immersed in ionic liquids

Abstract

Electron transfer from both cations and anions to the Au surface contributes dominantly to the electrode potential shift.

Discriminating active sites for the electrochemical synthesis of H2O2 by molecular functionalisation of carbon nanotubes

“…44 We then explored the possibility that changes in the surface charge could be induced by the implanted AQ molecules since this could potentially affect the rate of electron transfer (RDS for this reaction). 45 Thus, from differential capacitance measurements, the potential of zero charge (PZC) was evaluated in a 10 mM NaF electrolyte. The AQ-CNTs show slightly higher PZC values than the AQ/CNT and CNT (ESI Fig.…”

Differential Capacitance of Electric Double Layers: A Poisson-Bikerman Formula

“…The diameters of cation, anion, and water we use are d + = 2.66, d − = 4.69, and d w = 2.8 Å [42,44], respectively. The potential shift at the interface is -0.97 V [16,42] so we define φ 0 = φ 0 − 0.97. Since the dielectric constant of various ionic liquids is about 15.5 on average [45], we use the permittivity function ǫ(φ 0 ) = (78.4 − 15.5) exp(− (φ 0 + 0.97) 2 2 • 0.1 2 ) + 15.5 ǫ 0 (13) as a normal distribution of φ 0 with the mean value -0.97 V and the standard deviation 0.1…”

“…The EDL determines most of the properties of solutions because of the enormous strength of the electric field compared to concentration fields, except in the most crowded situations. Studies of EDLs are of fundamental importance in adsorbent, energy, and membrane technologies [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] as well as in biological systems [21][22][23][24][25][26][27][28][29].…”

Elaboration of near‐valence band defect states leading deterioration of ambipolar operation in SnO thin‐film transistors

“…In this simulation, we considered the shift of the gate work function associated with the negative potential shift at the electrode surface by the ionic liquid. [50] Material parameters consistent with SnO channel are summarized in Table S1. [51][52][53] The uniform bulk trap density and interface trap density are also considered in the simulation.…”