The Porous Structure of Copper-cadmium Oxide System Prepared by AC Electrochemical Synthesis

Dolinina, A.S.; Коробочкин, В. В.; Usoltseva, Natalia; Pugacheva, S.E.; Попов, М. В.

doi:10.1016/j.proche.2015.10.023

Cited by 3 publications

(3 citation statements)

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“…Potentiodynamic measurements in alkaline solutions on a copper anode indicate the formation of Cu2O, CuO and Cu(OH)2. It is likely that copper (I) oxide first forms on the copper anode, in accordance with the general reaction: 2Cu + 2OH-= Cu2O + H2O + 2e-Е = -0.358 V (1) According to the data in the studied literature, copper(II) oxide CuO and bivalent copper hydroxide Cu(OH)2 form during anodic oxidation, on the other hand, a number of publications [16][17][18] confirm the anodic oxidation of copper electrodes, commencing with initial oxidation, namely, the formation of Cu2O.…”

Section: Resultsmentioning

confidence: 78%

Study of Kinetics of Copper Oxidation by Electrolysis Under Non-Stationary Conditions

Mamyrbekova¹,

Mamyrbekova²,

Kassymova³

et al. 2021

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Data on the study of the kinetics and mechanism of copper electro-oxidation -reduction processes in alkaline and neutral solutions were obtained in this work. Patterns of the electrochemical oxidation of copper using alternating current were established. Based on the data of polarisation measurements kinetic parameters were calculated: the heterogeneous rate constant, the effective activation energy of copper electro-oxidation, which allow to establish the course of the metal oxidation process in alkaline and neutral environments and its characteristics. Potentiodynamic measurements in alkaline solutions at a copper anode indicate the formation of Cu2O, CuO и Cu(OH)2. Anodic dissolution of copper in neutral salt solutions includes two main stages: the formation of Cu(I) and Cu(II) ions. It was found that the product of oxidation at high potentials is the Cu(II) ion. The nature of the anion electrolyte affects the rate of copper anodic oxidation, while the process occurs more efficiently in solutions of sulfate and sodium chloride and is accompanied by significant polarisation. Based on the study of kinetics the possibility of obtaining powders of metal oxide was shown, which further allowed to determine the parameters of the electrolysis process in non-stationary conditions in order to obtain highly dispersed materials based on copper oxides with specific physico-chemical properties.

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Section: Resultsmentioning

confidence: 78%

Study of Kinetics of Copper Oxidation by Electrolysis Under Non-Stationary Conditions

Mamyrbekova¹,

Mamyrbekova²,

Kassymova³

et al. 2021

News of NAN RK. SCTS

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show abstract

“…The observed thermal effects are for the processes related to dehydration, Cu2O to CuO oxidation and dissociation of dispersed oxides, respectively. The main dehydration processes of hydroxides of cadmium and copper, occur in a temperature range of 180 to 350 °C [14]. They are accompanied by a mass loss of 12.3%.…”

Section: Joint Electrochemical Copper and Cadmium Oxidationmentioning

confidence: 99%

“…Alternating current electrolysis provides a route to the synthesis of metal oxides powders at non-equilibrium conditions. Non-equilibrium electrolysis forms metal oxides [12] and oxide systems [13,14] with high dispersion, developed pore structures and a low content of impurities.…”

Section: Introductionmentioning

confidence: 99%