Cyclic voltammetric studies of tellurium in diluted HNO3 solutions

• Autorzy: Rudnik E. , Sobesto J.

Warianty tytułu

PL

Woltamperometryczne badania telluru w rozcieńczonych roztworach HNO3

• Języki publikacji: EN

Abstrakty

EN

Electrochemistry of tellurium stationary electrode was studied in nitric acid solutions of pH 2.0 and 2.5. Two sparingly soluble products were formed at potentials above 200 mV (SCE): TeO2 and H2TeO3. H2TeO3 and TeO2 could dissolve to HTeO+2 under acidic electrolyte, but this process was hindered at pH 2.5. Cathodic polarization of tellurium electrode below -800 mV was accompanied by evolution of H2Te, which was then oxidized at the potentials approx. -700 mV.

PL

Przeprowadzono elektrochemiczne badania zachowania się telluru w roztworach kwasu azotowego(V) o pH 2,0 i 2,5. Produktami utleniania telluru przy potencjałach powyżej 200 mV (wzgl. NEK) są słabo rozpuszczalne związki TeO2 i H2TeO3. TeO2 i H2TeO3 ulegają wtórnemu rozpuszczaniu w roztworze kwaśnym z utworzeniem HTeO+2, przy czym proces ten jest hamowany przy pH 2,5. W warunkach polaryzacji katodowej tellur metaliczny redukuje się do H2Te (przy potencjałach poniżej -800 mV), który utlenia się przy potencjale ok. -700 mV.

Słowa kluczowe

EN

tellurium; cyclic voltammetry; pH

PL

tellur; badania woltamperometryczne; pH

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2011
• Tom: Vol. 56, iss. 2
• Strony: 270--277
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Rudnik E.

autor

Sobesto J.

• Faculty of Non-Ferrous Metals Department of Physical Chemistry and Metallurgy of Non-Ferrous Metals, Laboratory of Physical Chemistry and Electrochemistry, Agh University of Science and Technology, 30-059 Kraków, 30 Mickiewicza Av., Poland

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