The Influence of Protonation on the Electroreduction of Bi (III) Ions in Chlorates (VII) Solutions of Different Water Activity

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• 作者：Agnieszka Nosal-Wiercińska ; Mariusz Grochowski ; Ma?gorzata Wi?niewska…
• 关键词：Electrochemistry ; Bi (III) electroreduction ; Protonation ; Double layer ; Kinetic parameters ; Catalytic activity
• 刊名：Electrocatalysis
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：6
• 期：3
• 页码：315-321
• 全文大小：492 KB
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• 作者单位：Agnieszka Nosal-Wiercińska (1)
  Mariusz Grochowski (1)
  Ma?gorzata Wi?niewska (2)
  Katarzyna Tyszczuk-Rotko (1)
  S?awomira Skrzypek (3)
  Mariola Brycht (3)
  Dariusz Guziejewski (3)
  
  1. Faculty of Chemistry, Department of Analytical Chemistry and Instrumental Analysis, M. Curie-Sk?odowska University, M. Curie-Sk?odowska Sq. 3, 20-031, Lublin, Poland
  2. Faculty of Chemistry, Department of Radio Chemistry and Colloid Chemistry, M. Curie-Sk?odowska University, M. Curie-Sk?odowska Sq. 3, 20-031, Lublin, Poland
  3. Faculty of Chemistry, Department of Inorganic and Analytical Chemistry, University of ?ód?, Tamka 12 Sq, 90-236, ?ód?, Poland
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Electrochemistry
  Physical Chemistry
  Energy Technology
  
• 出版者：Springer New York
• ISSN：1868-5994

文摘

We examined the electroreduction of Bi (III) ions in chlorate (VII) solutions under varied protonation conditions of the depolariser using voltammetric and impedance methods. The results of the kinetic parameter correlation lead to the statement that the changes in the amount of chloric (VII) acid against the amount of its sodium salt in the supporting electrolytes of the low water activity have a significant influence on the rate of Bi (III) ion electroreduction. The increase of the concentration of chloric acid sodium salt, as well as the chloric (VII) acid alone within the particular concentration of the supporting electrolyte, inhibits the process of Bi (III) ion electroreduction. It should be associated with the reorganisation of the structure of the double layer connected with the slow dehydration inhibited by ClO ₄ ?/sup> ions. The standard rate constants k _s values with the increase of the chlorate (VII) concentrations for all the solutions examined of chlorates (VII) confirms the catalytic influence of the decrease of water activity on the process of Bi (III) ion electroreduction. The multistage process is confirmed by the non-rectilinear 1nk _f--em class="EmphasisTypeItalic">f(E) dependences.