Electrochemical Precipitation of Nickel Hydroxide

Abstract

never formed on the (100) surface. Instead, the CrO(111) film that formed on the (100) surface became disordered upon immersion in 0.1M HC1, indicating a breakdown of its lattice.In summary, the films formed on the (100) surface plane of the Fe-Cr-Ni alloy contained a smaller percentage of Cr and were less stable in acid than those formed on the (111) plane of the same alloy.

Mechanistic Study of Cathodic Electrodeposition of Zinc Oxide and Zinc Hydroxychloride Films from Oxygenated Aqueous Zinc Chloride Solutions

“…Combined voltammetric and micro gravimetric studies.- Figure 2 presents combined current-voltage and mass-volt- [10] age curves in a KC1 (0.1 M) solution, at 25 "C in the presence of oxygen (a), Zn2 ions without oxygen (b), and with both zinc and oxygen at 25 °C (c), and 50 °C (d).…”

Pseudo-capacitive Behavior of Cobalt Hydroxide/Carbon Nanotubes Composite Prepared by Cathodic Deposition

“…In addition, these redox transitions, which exchange protons (or OH − ) with the electrolyte should obey Eqs. (1) or (2) because the redox transitions of superficial oxycations followed a nonstoichiometric ratio [14,15].…”

“…Cobalt hydroxide electrodes for battery applications are generally fabricated by electrochemical impregnation of porous metal plaques by a one-step, cathodic reduction reaction. An α-form of cobalt hydroxide, isostructural with α-Ni(OH) 2 , has also been successfully synthesized by electrodeposition reaction [14,15]. The motivation for the present study was to see if the cobalt hydroxide could be electrosynthesized in a similar fashion to pure and CNTs based composites for electrochemical supercapacitors.…”

Hydrotalcite-Type Materials Electrodeposited on Open-Cell Metallic Foams as Structured Catalysts

“…The reduction of some electroactive species, e.g., dissolved oxygen, water, and nitrate consumes H + or generates OH − , thus being responsible of the pH increase. The electrodeposition of hydroxides was originally developed for the modification of small and simple-shaped electrodes with Ni(OH) 2 [33,34] and it was later extended to the deposition of more complex hydrotalcite-type (HT) compounds, also called layered double hydroxides, with general formulaand Co/Al or Co/Cr HTs [36] were initially synthesized onto a Pt-foil cathode then Ni/Co, Ni/Fe, and Co/Fe formulations were applied as sensors [37], redox supercapacitors [38,39] and, more recently, as electrocatalysts, mainly for oxygen evolution reaction [40][41][42]. In these two latter fields, there is a growing interest in replacing conventional 2D by 3D supports such as fibers [43,44] and open-cell foams [45][46][47].In this context, we reported for the first time in 2008 the electro-base generation method to coat FeCrAlloy foams with HT compounds for the preparation of H 2 production structured catalysts [48].…”

“…The reduction of some electroactive species, e.g., dissolved oxygen, water, and nitrate consumes H + or generates OH − , thus being responsible of the pH increase. The electrodeposition of hydroxides was originally developed for the modification of small and simple-shaped electrodes with Ni(OH) 2 [33,34] and it was later extended to the deposition of more complex hydrotalcite-type (HT) compounds, also called layered double hydroxides, with general formula…”