EIS studies of electrodeposition process of manganese and copper doped ZnO wires

Abstract

Electrodeposition of manganese-and copper-doped ZnO wires into polycarbonate membranes, from an aqueous solution containing 0.05 mol dm −3 Zn(NO 3 ) 2 + 0.01 mol dm −3 Mn(NO 3 ) 2 + 0.0005 mol dm −3 Cu(NO 3 ) 2 + 0.0075 mol dm −3 lactic acid, pH = 4.7 was investigated using linear sweep voltammetry and electrochemical impedance spectroscopy (EIS). The equivalent electrical circuits for fitting experimental results were similar to those for characterization of metal/polymer coating systems. Impedance data and voltammetric curves showed that an increase of local pH due to reduction process of nitrate ions induces the co-precipitations of metal ions in the proximity of electrode as oxides.

Large-scale synthesis of Au–Ni alloy nanowires using electrochemical deposition

“…2b. c Fig. 3 continued C c corresponds to the electrical capacitance of the AAM, R e the ohmic drop across the electrolyte, R p the electrical resistance of the pores, R ct is attributed to the charge transfer resistance, W represents the Warburg impedance characterizing the diffusion process and C dl corresponds to the double layer capacitance (Sima et al 2008). Figure 3a presents the SEM micrograph of Au-Ni nanowires embedded in AAM.…”

Ce-doped ZnO nanorods by electrodeposition

“…Doping of ZnO nanostructures is of considerable interest for a variety of practical applications, and successful doping with different elements has been achieved [1][2][3][4][5][6]. In particular, doping of ZnO with rare earth materials [1,4] is of interest for tailoring its optical properties.…”

Electrodeposition of a Mn–Cu–ZnO Hybrid Material for Supercapacitors: A Soft X‐ray Fluorescence and Absorption Microspectroscopy Study

“…The electrodeposition of Mn-Cu-ZnO systems has been described in the literature-for different applications such as CO hydrogenation catalysis, [18,19] spintronics, [20] and photoluminescent sensors [21] -in the form of films, [20,21] nanowires, [18][19][20][21][22] and nanotubes. [18][19][20] Mn-Cu-ZnO electrodeposition has been performed both directly on metal surfaces, for the growth of films, [19,20] and in templates, for the synthesis of nanowires and nanotubes.…”

“…[24] The reaction mechanisms conjectured in the literature are reported in Table 1 of the Supporting Information. Electrodeposition processes have been studied by using electrochemical methods, such as linear sweep voltammetry (LSV) [18][19][20]22] and electrochemical impedance spectroscopy (EIS), during the growth process in templates. Electrodeposition processes have been studied by using electrochemical methods, such as linear sweep voltammetry (LSV) [18][19][20]22] and electrochemical impedance spectroscopy (EIS), during the growth process in templates.…”

“…Relevant in the electrodeposition process of interest are mass-transport constraints, in which precipitation reactions play a major role, becoming more crucial for the template electrodeposition [18] of nanowires and nanorods. [22] Potential tracks of galvanostatic pulse-plating have been recorded and discussed in terms of double-layer relaxation rates. [22] Potential tracks of galvanostatic pulse-plating have been recorded and discussed in terms of double-layer relaxation rates.…”