Copper oxides: kinetics of formation and semiconducting properties. Part II. Copper single crystals

Vvedenskii, A. V.; Grushevskaya, S. N.; Ganzha, S. V.; Eliseev, D. S.; Abakumova, L. I.

doi:10.1007/s10008-014-2569-x

Cited by 19 publications

(17 citation statements)

References 25 publications

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“…Scientists have also considered it as a potential candidate as coating material in nuclear waste storage containers . Experiments show that under alkaline conditions, the oxidation/reduction (including electrode restructuring and corrosion) rate and the electrocatalytic properties of Cu electrodes strongly depend on the crystallographic orientation of the surface. Several other investigations report analogous findings on Cu, albeit in neutral and acidic aqueous environment ,…”

Section: Introductionmentioning

confidence: 99%

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

Engstfeld

Maagaard

Horch

et al. 2018

Chemistry A European J

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Single and polycrystalline Cu electrodes serve as model systems for the study of the electroreduction of CO , CO and nitrate, or for corrosion studies; even so, there are very few reports combining electrochemical measurements with structural characterization. Herein both the electrochemical properties of polycrystalline Cu and single crystal Cu(1 0 0) electrodes in alkaline solutions (0.1 m KOH and 0.1 m NaOH) are investigated. It is demonstrated that the pre-treatment of the electrodes plays a crucial role in determining their electrochemical properties. Scanning tunneling microscopy, X-ray photoelectron spectroscopy and cyclic voltammetry are performed on Cu(1 0 0) electrodes prepared under UHV conditions; it is shown that the electrochemical properties of these atomically well-defined electrodes are distinct from electrodes prepared by other methods. Also highlighted is the significant role of residual oxygen and electrolyte convection in influencing the electrochemical properties.

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Section: Introductionmentioning

confidence: 99%

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

Engstfeld

Maagaard

Horch

et al. 2018

Chemistry A European J

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“…The observed evolution of impedance parameters allows suggesting the decrease in corrosion rate, which was discussed in the literature earlier, and some enhancement to protective properties of a textured superhydrophobic layer during contact with the corrosive solution. The mechanism of such behavior of the electrochemical impedance spectroscopy (EIS) data may be related to further corrosion or anodic oxidation of cuprous oxide Cu 2 O to cupric oxide CuO.…”

Section: Resultsmentioning

confidence: 99%

Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

Бойнович

Emelyanenko

Domantovsky

et al. 2018

Adv Materials Inter

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anions such as chloride ions. [1,2,[4][5][6][7] This can compromise using bare copper and its alloys in technology because corrosion of copper impacts its performance in industrial and technological applications.Several ways for enhancing the corrosion protection were discussed in the literature, including the formation of thick oxide films [3,8,9] and the formation of a superhydrophobic layer atop of bulk copper. [10][11][12][13][14][15][16][17][18][19] As for oxide films on copper and copper alloys, typically the ionic state of copper can be either monovalent or divalent, associated with the formation of cuprous oxide Cu 2 O or cupric oxide CuO, respectively. In many cases, such as high temperature or anodic oxidation, the dual oxide phase formation takes place, with CuO occupying the outer and Cu 2 O the inner layers. [8,9,20,21] Such complex oxide layer has been found to be useful in improving the corrosion resistance of copper in NaCl solutions, [1,2,8,22] while the formation of a compact thick film of CuO on Cu surface prevents anodic corrosion. [23] The superhydrophobic films on metal surfaces essentially inhibit the electrochemical corrosion processes due to several protection mechanisms, such as electrolyte repellency, suppression of adsorption of aggressive ions onto the surface, barrier effect of the modified textured surface layer, and specific charging of a hydrophobic surface in electrolytes. [24,25] At the same time, for the majority of designed superhydrophobic coatings, a poor abrasive resistance restricts the practical application of these coatings. However, it was shown recently [26] that a strategy, combining the laser chemical modification of metal's surface layer and laser texturing, followed by chemisorption of low energy compounds, can be effectively used to control the mechanical and chemical properties of a superhydrophobic layer on aluminum substrate.In this study, we will demonstrate that the coatings with enhanced protective properties based on multibarrier principle can be designed on copper using the above strategy. We will show that nanosecond laser treatment in an oxygen atmosphere under appropriate laser texturing regimes followed by chemisorption of fluorooxysilane allows obtaining a thick layer of cupric oxide CuO with crystalline micro-and nanotexture and superhydrophobic properties. Triple layer copper oxide structure designed in that way allows solving the problem of durable polyfunctionality of superhydrophobic coatings. We will present Copper and its alloys are among the most used metals for the industry. However, using bare copper and its alloys in technology is compromised because corrosion and poor abrasion resistance of copper impacts its performance in industrial and technological applications. In this paper, a strategy based on combining the laser chemical modification of metal's surface in a controlled atmosphere and laser texturing, followed by chemisorption of low energy compounds is effectively used for fabrication of a superhydrophobic coating with enhanced prot...

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“…Three-dimensional macroscopic structure formation for Cu electrodes in alkaline me-dia is not uncommon. [66][67][68] Performing electrolysis at intermediate voltages (250 V) results in pitting of the surface. Performing electrolysis at high voltages, including the region for CGDE, the surface becomes more smooth.…”

Section: Cumentioning

confidence: 99%

Structural Evolution of Pt, Au, and Cu Anodes by Electrolysis up to Contact Glow Discharge Electrolysis in Alkaline Electrolytes

Artmann¹,

Menezes²,

Forschner³

et al. 2021

Preprint

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<div>Applying a voltage to metal electrodes in contact with aqueous electrolytes results in the electrolysis of water at low voltages and plasma formation in the electrolyte at high voltages referred to as contact glow discharge electrolysis (CGDE). While several studies explore parameters that lead to changes in the I-U characteristics in this voltage range, little is known about the evolution of the structural properties of the electrodes. Here we study this aspect on materials essential to electrocatalysis, namely Pt, Au, and Cu. The stationary I-U characteristics are almost identical for all electrodes. Detailed structural characterization by optical microscopy, scanning electron microscopy, and electrochemical approaches reveal that Pt is stable during electrolysis and CGDE, while Au and Cu exhibit a voltage-dependent oxide formation. More importantly, oxides are reduced when the Au and Cu electrodes are kept in the electrolysis solution. We suspect that H<sub>2</sub>O<sub>2 </sub>(formed during electrolysis) is responsible for the oxide reduction. The reduced oxides (which are also accessible <i>via</i> electrochemical reduction) form a porous film, representing a possible new class of materials in energy storage and conversion studies.</div>

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Copper oxides: kinetics of formation and semiconducting properties. Part II. Copper single crystals

Cited by 19 publications

References 25 publications

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

Polycrystalline and Single‐Crystal Cu Electrodes: Influence of Experimental Conditions on the Electrochemical Properties in Alkaline Media

Pulsed Laser Induced Triple Layer Copper Oxide Structure for Durable Polyfunctionality of Superhydrophobic Coatings

Structural Evolution of Pt, Au, and Cu Anodes by Electrolysis up to Contact Glow Discharge Electrolysis in Alkaline Electrolytes

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