Template electrochemical deposition and characterization of zinc–nickel alloy nanomaterial

Foyet, A.; Hauser, A.; Schäfer, Wieland

doi:10.1016/j.jelechem.2007.03.014

Cited by 11 publications

(5 citation statements)

References 31 publications

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“…For better dissolution of Ni‐enriched phases, the presence of Cl − ions in electrolyte is necessary [35, 36], the other way is to add ligands, forming strong solvable complexes with Ni or ligands that form soluble complex compounds with nickel [19, 37–42, 25].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

Maizelis

Kolupaieva

2020

Electroanalysis

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We propose quantitative analysis of chemical and phase composition of Zn−Ni alloy depending on the film thickness, using potentiodynamic stripping in an alkaline ammonia‐glycinate electrolyte. The mechanism of dissolution of zinc‐enriched Zn−Ni alloy films in this electrolyte comprises sequential stages of dissolution of zinc‐phase and zinc from a γ‐phase of various structures, followed by dissolution of the nickel‐enriched residue, formed by dezincification, and matrix nickel.

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Section: Introductionmentioning

confidence: 99%

Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

Maizelis

Kolupaieva

2020

Electroanalysis

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“…In recent years, an increasing interest has been focused on the development of new nanostructures such as nanodots, nanopillars, nanowires or nanotubes based on multiple functional materials such as polymeric [1][2][3], magnetic [4][5][6], semiconductive [7,8], ceramic [9] or metallic materials [10,11]. Among the existing fabrication methods, the template synthesis using nanoporous anodic alumina templates (NAATs) is one of the most widely used.…”

Section: Introductionmentioning

confidence: 99%

Structural engineering of nanoporous anodic alumina funnels with high aspect ratio

Santos

Formentı́n

Pallarès

et al. 2011

Journal of Electroanalytical Chemistry

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“…9,19 There are few reports on Zn-Ni alloy nanostructures. Recently, Foyet et al 20 have prepared Zn-Ni alloy nanorods with average heights of 360-500 nm and thickness of about 50 nm by direct electrochemical reduction and pulse-current electrodeposition. The synthesis of ␥-phase Ni 5 Zn 21 nanowires 60 nm in diameter fabricated by electrodeposition has also been reported.…”

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confidence: 99%

Electrocodeposition of Nanocrystalline Single-Phase γ-Zn[sub 3]Ni Alloy on Composite Graphite

M.A.Tehrani

Ghani

2008

J. Electrochem. Soc.

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The single-phase gamma zinc-nickel alloy ͑␥-Zn 3 Ni͒ nanocrystal was deposited on composite graphite electrode at a scan rate of 10,000 mV s −1 . The average particle size obtained was 11.8 Ϯ 3.1 nm. Transmission electron microscopy analysis indicated that codeposition applied potential, i.e., nucleation overpotential, scan rate, and codeposition time were critical on crystal sizing and Ni content in the matrix. Cyclic voltammetry and analysis of X-ray diffraction have also indicated that single-phase ͑␥-phase͒ alloy was, indeed, obtained at the scan rate used. The results also revealed that 19.0 wt % Ni nanoparticles were uniformly dispersed in the phase compositions of the alloy coating.Nanostructure materials with their unique and fascinating properties have prompted scientists to explore the possibilities of using them in industrial applications. For example, bimetallic thin films and nanoalloys, especially those with magnetic quality, could be used in storage systems, 1 superconductors, electrochromic materials, catalysts, and decorative and protective coatings. 2,3 Zinc is usually used as sacrificial anode, which provides cathodic protection to iron. However, this coating corrodes rapidly; hence, Zn-Ni alloy coating containing up to 12 wt % Ni 4 is used as the passivation agent to minimize this problem. Zn-Ni alloys exhibit a high protective function against corrosion, good mechanical properties, 5 and low hydrogen brittleness 6 as compared to pure zinc and galvanized steel. It has been widely applied as a highly corrosion-resistant coating, especially in steel mills and automotive and computer industries. 7-9 Zn-Ni alloy has a higher negative potential than cadmium and, hence, dissolves rapidly in corrosive environments. But, it is a good replacement for cadmium coating due to the latter's toxicity. 10 The electrodeposition of Zn-Ni alloy is classified as an anomalous type of codeposition. 11 In the electrodeposition, Zn, a thermodynamically less-noble metal than Ni, is preferentially deposited. The formal electrode potentials ͑E o ͒ for Zn 2+ /Zn and Ni 2+ /Ni pairs are −0.762 and −0.236 V, respectively. The alloy composition always has a greater abundance of zinc than of nickel. Higher Ni content leads to a more-positive open-circuit potential, which in turn reduces the motivation force for the galvanic corrosion. 10 The commonly employed Zn-Ni alloy in the aeronautical industry has 15-22 wt %. 12 Attempts to rationalize the anomalous electrodeposition of the Zn-Ni alloy are not quite successful. 13-15 One reason could be the favorable kinetic effect of Zn deposition as compared to Ni deposition. 13 The increase in pH near the cathode surface, followed by the formation of Zn hydroxide precipitate and the inhibition of Ni discharge, is also suggested. 14,15 In addition to this, the effects of organic additives on improved Ni content in the alloy composition are also investigated. 6,13 There are three intermetallic phases, i.e., ␥, , and ␦ based on Ni content, on the equilibrium-phase diagram for the Zn-Ni...

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Template electrochemical deposition and characterization of zinc–nickel alloy nanomaterial

Cited by 11 publications

References 31 publications

Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

Quantitative Analysis of Chemical and Phase Composition of Zn−Ni Alloy Coating by Potentiodynamic Stripping

Structural engineering of nanoporous anodic alumina funnels with high aspect ratio

Electrocodeposition of Nanocrystalline Single-Phase γ-Zn[sub 3]Ni Alloy on Composite Graphite

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