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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-839234ae-1df5-4ea4-ada8-1cc7c65b1000

Czasopismo

Archives of Metallurgy and Materials

Tytuł artykułu

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

Autorzy Kowalik, R. 
Treść / Zawartość
Warianty tytułu
PL Analiza woltamperometryczna procesu elektrochemicznego osadzania selenu na elektrodzie złotej
Języki publikacji EN
Abstrakty
EN 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 chronoamper-ometry 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 Se0to Se-2ions. 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 H2SeO3adsorption 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.
PL Zastosowano 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 Se0do jonów Se-2. Powyższe eksperymenty potwierdziły wysoką przdatność technik woltamperometrycznych jako metody badawczej w celu analizy mechanizmu osadzania powłok metodą elektrochemiczną.
Słowa kluczowe
PL selen   kwas selenowy   metoda elektrochemiczna   adsorpcja   woltamperometria cykliczna   złoto  
EN selenium   selenious acid   electrodeposition   adsorption   cyclic voltammetry   gold  
Wydawca Polish Academy of Sciences, Committee of Metallurgy, Institute of Metallurgy and Materials Science
Czasopismo Archives of Metallurgy and Materials
Rocznik 2015
Tom Vol. 60, iss. 1
Strony 57--63
Opis fizyczny Bibliogr. 29 poz., rys.
Twórcy
autor Kowalik, R.
  • AGH University of Science and Technology, Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Faculty of Non-Ferrous Metals, Al. A. Mickiewicza 30, 30-059 Kraków, Poland
Bibliografia
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Kolekcja BazTech
Identyfikator YADDA bwmeta1.element.baztech-839234ae-1df5-4ea4-ada8-1cc7c65b1000
Identyfikatory
DOI 10.1515/amm-2015-0009