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Citation: Mi Chang-Huan, Xia Xi, Zhang Xiao-Gang. Redox Behaviours of Mn(Ⅱ)/Mn(Ⅲ) in Sulphuric Acid[J]. Acta Physico-Chimica Sinica, ;2002, 18(11): 1038-1042. doi: 10.3866/PKU.WHXB20021116 shu

Redox Behaviours of Mn(Ⅱ)/Mn(Ⅲ) in Sulphuric Acid

1.
Institute of Applied Chemistry, Xinjiang University, Urumqi　830046

Received Date: 17 January 2002
Available Online: 15 November 2002

Oxidation of Mn(II) to Mn(Ⅲ) and reduction of Mn(Ⅲ) on platinum electrode in sulphuric acid were investigated by cyclic voltammetry as a function of the Mn(II) concentration ,acid concentration, scan rate, temperature and convection. It was found that oxidation of Mn(II) and reduction of Mn(Ⅲ) were mass transfer controlled. High temperature and stirring enhanced the oxidation rate of Mn(II) to Mn(Ⅲ).Increase of acid concentration or Mn(II) concentration favours the stability of Mn(Ⅲ), i.e. inhibits the disproportionation and hydrolysis of Mn(Ⅲ).
- Mn(Ⅱ)/Mn(Ⅲ) redox;Electrochemical oxidation;Electrochemical reduction;Cyclic voltammetry;Acid solution
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