Articles & Issues
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
Rutile-Type 금속산화물전극에 의한 요오드산염의 생성(I)
Formation of Iodate on Rutile-Type Metal Oxide Electrode (I)
HWAHAK KONGHAK, April 1988, 26(2), 141-148(8), NONE
Download PDF
Abstract
열분해법으로 제작한 Ti/RuO2 전극을 사용하여 요오드화칼륨에 대한 cyclic voltammogram 및 전류-전위곡선을 측정하여 요오드이온의 양극산화반응 내용을 검토하고 매크로전해에 의하여 요오드화칼륨용액으로부터 요오드산염을 전해제조할 경우 최적 전해조건을 검토하였다.
요오드이온은 가역적인 제1단계의 전극반응에 의하여 요오드로 산화되며 요오드는 전해액의 액성에 따라 비가역적인 제2단계의 전극반응 또는 화학반응에 의하여 요오드산이온으로 산화된다.
요오드산염의 전해제조는 pH 10의 약알칼리성용액에서 가장 유리하였으며 정전위 및 정전류전해 결과 1.05 V 및 30 A/d㎡에서 가장 높은 전류효율을 나타내었다.
요오드이온은 가역적인 제1단계의 전극반응에 의하여 요오드로 산화되며 요오드는 전해액의 액성에 따라 비가역적인 제2단계의 전극반응 또는 화학반응에 의하여 요오드산이온으로 산화된다.
요오드산염의 전해제조는 pH 10의 약알칼리성용액에서 가장 유리하였으며 정전위 및 정전류전해 결과 1.05 V 및 30 A/d㎡에서 가장 높은 전류효율을 나타내었다.
Cyclic voltammogram and current-voltage curve of potassium iodide were measured on Ti/RuO2 electrode, prepared by thermal decomposition method, to study the reaction for iodate formation by oxidation of iodide and macro-electrolysis was carried out to investigate the optimum conditions for electrolytic preparation of iodate from potassium iodide solution.
At first, iodide is oxidized to iodine by reversible electrode reaction and then iodine is oxidized to iodate, depends on the pH of electrolyte, by irreversible electrode reaction or chemical reaction.
The electrolytic preparation of iodate is effective in weak alkaline solution （pH 10）. As a result of electrolysis at constant voltage and constant current, maximum current efficiency was obtained at 1.05 V and 30 A/dm2.
At first, iodide is oxidized to iodine by reversible electrode reaction and then iodine is oxidized to iodate, depends on the pH of electrolyte, by irreversible electrode reaction or chemical reaction.
The electrolytic preparation of iodate is effective in weak alkaline solution （pH 10）. As a result of electrolysis at constant voltage and constant current, maximum current efficiency was obtained at 1.05 V and 30 A/dm2.
