Preparation of Chlorine Dioxide by Electrocatalytic Reduction of Sodium Chlorate

Mei Tian; Ying Ying Li; Hao Chen Sun; Li Juan Yang; Zhi Long Li

doi:10.4028/www.scientific.net/AMR.781-784.342

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 781-784Preparation of Chlorine Dioxide by...

Preparation of Chlorine Dioxide by Electrocatalytic Reduction of Sodium Chlorate

Abstract:

Preparation of chlorine dioxide by electrocatalytic reduction of sodium chlorate with Ti/IrO₂ anode and Ti cathode was studied in a three-electrode cell without any diaphragm but with a sandwich bath by galvanostatic electrolysis. Classic iodometry was used to determine the concentration of ClO₂ in the electrolyte. The change of space-time yield with current density, the concentration of H₂SO₄, the concentration of NaClO₃, reaction temperature and electrolysis time were studied through single factor experiment in order to determine the optimal conditions of electrolysis. It shows that the optimal conditions of ClO₂ preparation by electrocatalytic reduction of sodium chlorate were: i=60 mA/cm², [H₂SO₄]=4.5 mol/L, [NaClO₃]=1.0 mol/L, T=30 °C, t=30 min. Under these conditions, the space-time yield of ClO₂ reached 1.50 mg/L·s.

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Periodical:

Advanced Materials Research (Volumes 781-784)

Pages:

342-345

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.781-784.342

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Online since:

September 2013

Authors:

Mei Tian, Ying Ying Li, Hao Chen Sun, Li Juan Yang, Zhi Long Li

Keywords:

Chlorine Dioxide, Electrocatalytic Reduction, Sodium Chlorate, Ti Cathode, Ti/IrO₂ Anode

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