The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode

Kowalik, Remigiusz

doi:10.1515/amm-2015-0009

Cited by 17 publications

(20 citation statements)

References 21 publications

(44 reference statements)

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“…In the reverse scan, the three oxidation peaks were correlated with selenium oxidation, as supported by literature (Kowalik, 2015 ). The first oxidation peak, A 1 , was correlated with the dissolution of bulk selenium; the second oxidation peak (A 2 ) with the dissolution of underpotentially deposited selenium; and the third oxidation peak (A 3 ) with the oxidation of selenium, which diffused into the gold electrode.…”

Section: Resultssupporting

confidence: 83%

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Seyedmahmoudbaraghani

Lim

et al. 2020

Front. Chem.

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Selenium, depending on its crystal structure, can exhibit various properties and, as a result, be used in a wide range of applications. However, its exploitation has been limited due to the lack of understanding of its complex growth mechanism. In this work, template-free electrodeposition has been utilized for the first time to synthesize hexagonal-selenium (t-Se) microstructures of various morphologies at 80°C. Cyclic voltammetry (CV) and linear sweep voltammetry (LSV) revealed 5 reduction peaks, which were correlated with possible electrochemical or chemical reaction related to the formation of selenium. Potentiostatic electrodeposition using 100 mM SeO 2 showed selenium nanorods formed at−0.389 V then increased in diameter up to −0.490 V, while more negative potentials (-0.594 V) induced formation of sub-micron wires with average diameter of 708 ± 116 nm. Submicron tubes of average diameter 744 ± 130 nm were deposited at −0.696 V. Finally, a mixture of tubes, wires, and particles was observed at more cathodic potential due to a combination of nucleation, growth, dissolution of structures as well as formation of amorphous selenium via comproportionation reaction. Texture coefficient as a function of applied potential described the preferred orientation of the sub-microstructures changed from (100) direction to more randomly oriented as more cathodic potentials were applied. Lower selenium precursor concentration lead to formation of nanowires only with smaller average diameters (124 ± 42 nm using 1 mM, 153 ± 46 nm using 10 mM SeO 2 at −0.389 V). Time-dependent electrodeposition using 100 mM selenium precursor at −0.696 V explained selenium was formed first as amorphous, on top of which nucleation continued to form rods and wires, followed by preferential dissolution of the wire core to form tubes.

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Section: Resultssupporting

confidence: 83%

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Seyedmahmoudbaraghani

Lim

et al. 2020

Front. Chem.

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“…Electrochemistry of selenium is very complex and it was analyzed numerous times. [19][20][21][22][23][24][25][26][27] The difficulty orginates from the three oxidation states (+6, +4, −2) and consequently, several electrode reactions taking place simultaneously on the electrode. Moreover selenium is very reactive and strong interaction during the reduction process is possible leading to the intermetallic compound formation with a metal substrate.…”

Section: Resultsmentioning

confidence: 99%

“…According to the tests formerly conducted in our laboratory, it can be assumed that a six-electron reaction of reduction to H 2 Se is taking place. 24,25,29 (Eq. 2)…”

Section: Mechanism Of Electrochemical Reaction On H 2 Seo 3 -H 2 Omentioning

confidence: 99%

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Electrodeposition of Ni₃Se₂

Kutyła

Kołczyk

Żabiński

et al. 2017

J. Electrochem. Soc.

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This paper presents the results work on the electrochemical deposition of Ni3Se2 phase from aqueous acidic solutions. The mechanism of electrode reactions in the Ni2+ - H2SeO3 – H2O system was investigated with the use of cyclic voltametry and a gold disk electrode. According to the voltametric and hydrodynamic methods, the process of nickel and selenium co-deposition is determined by the rate of selenium ions diffusion to the electrode surface. Ni3Se2 coatings were also obtained by the potentiostatic method on copper substrate. The elemental composition was determined with the XRF method. XRD analysis indicated that, in the range of potentials from −0.6 to −1.0 V the dominating phase is Ni3Se2. The influence of applied potential and concentration of electroactive species on the composition and the quality of the obtained coatings was determined. The Surface morphology was investigated with the use of scanning electron microscopy.

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“…The results found Se(0)/(2-) reduction current peak which are related to the surface limited phenomena of selenium process [17].…”

Section: Introductionmentioning

confidence: 81%

Electrochemical study of selenium (IV) mediated by carbon nanotubes modified glassy carbon electrode in blood medium

Radhi¹,

AL-Dulimy²,

Khalaf³

2016

Epitoanyag - JSBCM

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sodium selenite se(iv) was studied by cyclic voltammetric technique to identify the extent of its effect on both normal saline and blood medium components as oxidative or antioxidative reagent. carbon nanotube (cnt) was used to modify glassy carbon electrode (Gce) for the enhancement of redox current peaks. it was found from the results of the study that reduction current peak of se(iv) in blood medium appears at -1v in 0.1 mm of sodium selenite, but the reduction current peak disappears when adding more amount of se(iv) to the blood which causes enhancement of the oxidation current peak of se(iv) at 0.25 v in 10 mm of sodium selenite. Ascorbic acid (AA) was affected on the redox current peaks of se(iv) in blood medium that enhanced the cathodic current peak and disappearing the anodic current peak. so sodium selenite considered as antioxidative material at low concentration in blood medium and become oxidative in high concentration especially in presence of AA. keywords: cyclic voltammetry, carbon nanotube, glassy carbon electrode, blood medium, sodium selenite, normal saline

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The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode

Cited by 17 publications

References 21 publications

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Electrodeposition of Ni₃Se₂

Electrochemical study of selenium (IV) mediated by carbon nanotubes modified glassy carbon electrode in blood medium

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The Voltammetric Analysis of Selenium Electrodeposition from H2SeO3 Solution on Gold Electrode

Cited by 17 publications

References 21 publications

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Template-Free Electrochemical Deposition of t-Se Nano- and Sub-micro Structures With Controlled Morphology and Dimensions

Electrodeposition of Ni3Se2

Electrochemical study of selenium (IV) mediated by carbon nanotubes modified glassy carbon electrode in blood medium

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Product

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Electrodeposition of Ni₃Se₂