Deposition of selenium thin layers on gold surfaces from sulphuric acid media: Studies using electrochemical quartz crystal microbalance, cyclic voltammetry and AFM

Cabral, Murilo F.; Pedrosa, Valber A.; Machado, Sérgio Antônio Spínola

doi:10.1016/j.electacta.2009.10.008

Cited by 39 publications

(30 citation statements)

References 41 publications

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“…The three peaks are noticed when the scan is reversed to the positive direction, and according to the literature [20,[22][23][24][25][26][27] they are related with selenium oxidation. The peak F is related with the dissolution of bulk selenium and G with underpotentially deposited selenium.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

“…The fourth peak is assigned as a bulk deposition of selenium and the fifth as a reduction of Se 0 to Se 2− ions. Machado et al [26,27] analyzed the process of selenous acid behavior by voltammetry under similar conditions. The most important feature noticed by Machado at al.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

“…The onset potential of the voltammetric experiment was set at 0.5 V vs. Ag/AgCl electrode and was swept in the negative direction first, then reversed at -0.6 V. Subsequently, the potential was changed to the second reverse potential 1.1 V and the whole scan was finished at the initial potential 0.5 V. During the sweeping in the negative direction five reduction peaks A, B, C, D and E are observed. The nature of these peaks was analyzed in acidic environment by several groups and is described in the subsequent papers [19,20,[22][23][24][25][26][27][28]. It should be noted that common feature for all these reports is gold substrate, but of different quality (single crystal or polycrystalline) and pretreatment procedures.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

“…The very good reports by Andrews et al [19], Stickney at al. [20][21][22][23][24], Alanyalioglu et al [25] Machado et al [26,27] and Kowalik [28] provided extensive analysis of selenium electrodeposition on gold. Nonetheless, some aspects of the voltammetry results are still not clear.…”

Section: Introductionmentioning

confidence: 99%

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

Kowalik¹

2015

Archives of Metallurgy and Materials

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The different voltammetry techniques were applied to understand the process of selenium deposition from sulfate solution on gold polycrystalline electrode. By applying the cycling voltammetry with different scan limits as well as the chronoamperometry combined with the cathodic and anodic linear stripping voltammetry, the different stages of the deposition of selenium were revealed. It was found that the process of reduction of selenous acid on gold surface exhibits a multistage character. The cyclic voltammetry results showed four cathodic peaks which are related to the surface limited phenomena and which coincide with the bulk deposition process. The fifth cathodic peak is related to the reduction of bulk deposited Se 0 to Se −2 ions. Furthermore, the connection of anodic peaks with cathodic ones confirmed the surface limited process of selenium deposition, bulk deposition and reduction to Se −2 . Additionally, the cathodic linear stripping voltammetry confirms the process of H 2 SeO 3 adsorption on gold surface. The experiments confirmed that classical voltammetry technique proved to be a very powerful tool for analyzing the electrochemical processes related with interfacial phenomena and electrodeposition.Keywords: Selenium, selenous acid, electrodeposition, adsorption, cyclic voltammetry, goldZastosowano różne techniki woltamperometryczne w celu pełnego zrozumienia procesu osadzania selenu metodą elektrochemiczną na elektrodzie złotej. Wykorzystano w tym celu cykliczną woltamperometrię, a także chronoamperometrię połączona z katodową i anodową woltamperometrią inwersyjną. Wykazano, że proces osadzania selenu jest bardzo złożony i zachodzi w kilku etapach. Wyróżniono etap podpotencjałowego osadzania selenu, następnie zachodzi redukcja zaadsorbowanych cząsteczek kwasu selenowego(IV), po którym następuje nadpotencjałowe osadzanie selenu. W zakresie wysokich nadpotencjałów dochodzi do redukcji Se 0 do jonów Se 2 −.Powyższe eksperymenty potwierdziły wysoką przdatność technik woltamperometrycznych jako metody badawczej w celu analizy mechanizmu osadzania powłok metodą elektrochemiczną.

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Section: Cyclic Voltammetrymentioning

confidence: 99%

Section: Cyclic Voltammetrymentioning

confidence: 99%

Section: Cyclic Voltammetrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Kowalik¹

2015

Archives of Metallurgy and Materials

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“…The electrodeposition of selenium has been studied intensively in aqueous system. [14][15][16][17][18][19] However, the deposition process of Se has been known to be complicated due to several interrelated factors, such as under potential deposition (UPD), formation of compounds with electrode materials, formation of H 2 Se, coupled chemical reactions, and requirement of extreme pH conditions. Furthermore, the electrodeposition of selenium in aqueous solutions at room temperature often leads to formation of amorphous Se.…”

mentioning

confidence: 99%

Electrodeposition of Selenium in a Hydrophobic Room-Temperature Ionic Liquid

Saha

Tachikawa

Yoshii

et al. 2016

J. Electrochem. Soc.

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Electrodeposition of selenium (Se) in an amide type hydrophobic room temperature ionic liquid, 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)amide (BMPTFSA) containing SeCl 4 as a Se source in the presence of excess chloride on a glassy carbon electrode was studied at 25 and 50 • C. Raman spectroscopy showed SeCl 4 in BMPTFSA with excess chloride forms an octahedral chlorocomplex of [SeCl 6 ] 2-. The reduction of [SeCl 6 ] 2-to Se and that of Se to Se(-II) were observed by cyclic voltammetry. Electrodeposits obtained by potentiostatic electrolysis were confirmed to be metallic Se by energy dispersive X-ray, X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy.

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Electrodeposition of selenium from 1-ethyl-3-methyl-imidazolium trifluromethylsulfonate

Aal

Voigts

Chakarov

et al. 2012

J Solid State Electrochem

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Deposition of selenium thin layers on gold surfaces from sulphuric acid media: Studies using electrochemical quartz crystal microbalance, cyclic voltammetry and AFM

Cited by 39 publications

References 41 publications

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

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

Electrodeposition of Selenium in a Hydrophobic Room-Temperature Ionic Liquid

Electrodeposition of selenium from 1-ethyl-3-methyl-imidazolium trifluromethylsulfonate

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