| Electrooxidation of Mn(Ⅱ) on Pb-Sb-As Electrode in Sulfuric Acid |
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| 作者姓名： | Sun Zhirong Hu Xiang Zhou Ding |
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| 作者单位： | Dept.of Environmental Eng., Beijing Polytechnic University, Beijing 100022,P.R.China,Dept. of Applied Chemistry,Harbin Institute of Technology, Harbin 150001,P.R.China |
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| 基金项目： | 中国科学院资助项目，29577277， |
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| 摘 要： | The electrooxidation of Mn(Ⅱ) on Pb-Sb-As alloy electrode in sulfuric acid has been investigated.In order to make the two steps of indirect electrosynthesis of benzaldehyde carried out in the same sulfuric acid concentration and also obtain high current efficiency of Mn(Ⅱ) to Mn(Ⅲ) and high yield of Mn(Ⅲ) oxidizing toluene to benzaldehyde in the mean time,the electrooxidation of Mn(Ⅱ) in 60% H2SO4 has been studied.Experimental results show that high current efficiency of Mn(Ⅲ) (about 75%) is obtained in 60%H2SO4 at 60℃.The reason affecting the current efficiency of Mn(Ⅲ) is discussed,and it is the coordination of sulfuric acid concentration and electrolytic temperature.The law is found that it is suitable for electrolysis at low temperature when sulfuric acid concentration is low and at high temperature when sulfuric acid concentration is high.
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| 关 键 词： | Mn(Ⅱ) Electrooxidation Current efficiency Sulfuric acid Pb-Sb-As electrode |
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