Stability of K2FeO4 in Dilute KOH Solution

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (19): 1951-1955. Previous Articles Next Articles

K₂FeO₄在稀KOH溶液中的稳定性研究

杨卫华^1,2, 王建明¹, 曹江林¹, 潘滔¹, 张鉴清^1,3, 曹楚南^1,3

1. 浙江大学化学系, 杭州, 310027;
2. 华侨大学材料科学与工程学院, 泉州, 362011;
3. 中国科学院金属研究所金属腐蚀与防护国家重点实验室, 沈阳, 110015

投稿日期:2003-10-14 修回日期:2004-06-02 发布日期:2014-02-17
通讯作者: 王建明,E-mail:wjm@cmsce.zju.edu.cn;Tel:0571-87951513;Fax:0571-87951895. E-mail:wjm@cmsce.zju.edu.cn
基金资助:
国家自然科学基金(No.50172041)资助项目.

Stability of K₂FeO₄ in Dilute KOH Solution

YANG Wei-Hua^1,2, WANG Jian-Ming¹, CAO Jiang-Lin¹, PAN Tao¹, ZHANG Jian-Qing^1,3, CAO Chu-Nan^1,3

1. Department of Chemistry, Zhejiang University, Hangzhou 310027;
2. College of Materials Science and Engineering, Huaqiao University, Quanzhou 362011;
3. State Key Laboratory for Corrosion and Protection Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015

Received:2003-10-14 Revised:2004-06-02 Published:2014-02-17

Abstract

The stability of K₂FeO₄ in dilute KOH solution with initial pH value from 8.0 to 13.0 was studied in detail by spectrophotometry method in this paper. The decomposition rate of aqueous solution of K₂FeO₄ is basically regulated by its concentration, pH and the decomposed product FeOOH that can catalyze the decomposition of K₂FeO₄. The increase of HO^- concentration can improve the stability of K₂FeO₄ by decreasing the collision frequency between FeO₄^2- ions. However, when the concentration of HO^- reaches a certain value, the decomposition product FeOOH is easily produced. FeOOH can catalyze the decomposition of K₂FeO₄. It was found that K₂FeO₄ is the most stable in the pH region of 10.0～11.0 and the decomposition rate of K₂FeO₄ is in the first order in the initial period. The decomposition rule of K₂FeO₄ along with its concentration in KOH solution is related with the initial pH of the solution.

Key words: K₂FeO₄, stability, spectrophotometry method

Cite this article

YANG Wei-Hua, WANG Jian-Ming, CAO Jiang-Lin, PAN Tao, ZHANG Jian-Qing, CAO Chu-Nan. Stability of K₂FeO₄ in Dilute KOH Solution[J]. Acta Chimica Sinica, 2004, 62(19): 1951-1955.

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K₂FeO₄在稀KOH溶液中的稳定性研究

Stability of K₂FeO₄ in Dilute KOH Solution

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K2FeO4在稀KOH溶液中的稳定性研究