A comparative study of the electrochemical deposition kinetics of iron-palladium alloys on a flat electrode and in a porous alumina template

Kostevšek, Nina; Rožman, Kristina Žužek; Pečko, Darja; Pihlar, Boris; Kobe, Spomenka

doi:10.1016/j.electacta.2014.01.115

Cited by 17 publications

(14 citation statements)

References 36 publications

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“…Recently a lot of attention has been also paid to electrochemical deposition of other alloys containing platinum group metals i.e. Fe-Pd [14][15][16], Co-Rh [17], Co-Pd [18][19][20][21], Co-Pt [9], Fe-Pt [22,23], Ni-Pt [24,25], Pt-Co-Ni [26]. Electrodeposition of pure Ru as well as Ru containing alloys is quite complex process.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Mech

Żabiński

et al. 2015

Journal of Electroanalytical Chemistry

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Section: Introductionmentioning

confidence: 99%

Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Mech

Żabiński

et al. 2015

Journal of Electroanalytical Chemistry

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“…42 The results of CV ( the Au electrode. 43 Second, is the increase of the roughness factor by increase of Au thickness, which is defined here as a ratio of rmsroughness of sputtered 50 nm Au thin film to the rms-roughness of the 300 nm Au thin film. Figure 10 shows the images of thin film surfaces of Au sputtered on alumina.…”

Section: Measurements Of the Surface Area Of Different Au Electrodes-mentioning

confidence: 99%

Anomalous Codeposition offccNiFe Nanowires with 5–55% Fe and Their Morphology, Crystal Structure and Magnetic Properties

Dragos

Chiriac

Lupu

et al. 2015

J. Electrochem. Soc.

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The electrodeposition of NiFe nanowires-with the length ∼3.0 μm and diameter 200 nm-using the porous anodized aluminum oxide (AAO) templates on the sputtered Au-back electrode (300 nm) using sulfate/chloride electrolyte solution and potential pulsed deposition. The electrode area of Au-AAO template, determined by the reversible one-electron transfer oxidation of K 4 Fe(CN) 6 , used as a probe in CV, was found to be ∼2.4 times larger than Au-thin film electrode. The anomalous codeposition phenomenon known as a ,,volcano" type curve-with a maximum in Fe-content in NiFe as a function of the applied potential-was observed in the literature. The observed results were explained through the limited mass transport of Fe +2 ions after the peak. This explanation is partially correct, but not complete. The electrodeposition of NiFe nanowire in this work resulted in a similar "volcano" type curve. The alternative explanation of anomalous codeposition-through the surface concentration of H + dependent adsorption/desorption of FeOH + and NiOH + electroactive species-was proposed. The electrodeposition of NiFe nanowire arrays using a designed pulse potential method produced fcc NiFe nanowires with 5-55% Fe with controlled composition, length, and uniformity.The distinct decrease of parallel coercivity of NiFe nanowire arrays having the same length was observed with increase of Fe-content in NiFe, which also correlates with the increase of their magnetic saturation. 12 The studies on magnetic properties of NiFe nanowire arrays were intensified during last 15 years. [13][14][15][16][17][18][19][20] The electrodeposition of NiFe alloys exhibits a phenomenon known as an anomalous codeposition, which is characterized by the anomaly that less noble metal, i.e. Fe, deposits preferentially. 21 The extent of anomalous codeposition can be evaluated by the "selectivity ratio" (SR), which is defined as an atomic ratio of Fe/Ni in the deposit to the molar ratio of Fe +2 /Ni +2 in the electrolyte. 22 The SR is dependent on solution condition (pH, presence of organic additives, concentration of electrolytes, temperature, etc), method of electrodeposition (constant current density, controlled potential, pulsed current or potential), and the thickness of deposit. The value of SR ranges from 1.0 (for non-anomalous codeposition) to 15 (for anomalous codeposition). The variation of composition of NiFe films affects the following properties of deposit: (i) stress, 23 (ii) magnetostriction, 24 (iii) crystal structure, 25 and (iv) grain size. 26 Thereby, the resulting changes profoundly influence the magnetic behavior of electrodeposited NiFe alloys, which was demonstrated recently. 27The present work describes the method of electrodeposition of NiFe nanowires into anodized aluminum oxide (AAO) templates with the controlled elemental composition using designed potential pulse electrodeposition. We report here a new explanation for the observed anomalous codeposition of NiFe in nanowires, through the surface concentration of H + dependent adsorption/...

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“…In the electrochemical cell the coated film is placed on a holder, where the template acts as a cathode and the counter electrode is an anode. The deposition of the nanowires can be carried under galvanostatic (Peña et al, 2002) or potentiostatic conditions (Kostevšek et al, 2014).…”

Section: Template-assisted Electrodeposition Of Magnetic (And Opticalmentioning

confidence: 99%

Functionalization of magnetic nanowires for biomedical applications

Rožman

2015

Magnetic Nano- And Microwires

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A comparative study of the electrochemical deposition kinetics of iron-palladium alloys on a flat electrode and in a porous alumina template

Cited by 17 publications

References 36 publications

Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Electrochemical deposition of alloys in Ru3+–Co2+–Cl−–H2O system

Anomalous Codeposition offccNiFe Nanowires with 5–55% Fe and Their Morphology, Crystal Structure and Magnetic Properties

Functionalization of magnetic nanowires for biomedical applications

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