【摘要】 某些离子对Ｃｒ_２Ｏ_７^２－阳极形成过程的影响金世雄，周志刚，王岚（南开大学化学系，天津３０００７１）Ｃｒ（Ⅲ）阳极氧化为Ｃｒ（Ⅵ）是工业制取铬酸及其盐类的主要方法，也是从含铬工业废水中回收Ｃｒ（Ⅵ）的主要途径．文献￣［１］曾表明，Ｃｒ（Ⅲ）的阳?..更多还原

【Abstract】 The influence of Ag₂SO₄,Li₂SO₄,Na₂SO₄,K₂SO₄,NH₄)₂SO₄,MgSO₄ and KF onthe evolution of O₂ and the formation of Cr₂O at Pt and PbO₂ anodes was investigated in mixedH₂SO₄-Cr₂（SO₂）₃ solutions.The kinetic data related respectively to Cr₂O formation and O₂ evolutionat Pt and PbO₂ anodes were measured by method of resolving the steady-state polarization curve.TheTafel slope of steady-state ～1g i relationships for Cr₂O formation reaction is close to 2×2. 303RT/βF,whereas for O₂ evolution it is close to 2.303 RT/βF（with β=0.5）. The results indicate thatthe current efficiency for Cr₂O formation is increased by adding Ag￣+ ions to the anolyte and decreasedby adding Li￣+,Na￣+,K￣+,NH and Mg￣（2+） ions to the anolyte at Pt electrode.While on PbO₂ electrode,the current efficiency of Cr₂O formation is decreased by adding Ag￣+ and F￣- ions to the anolyte andincreased by adding K￣+ ions to the anolyte.更多还原