【摘要】 本文采用热分解法制备了几种不同组分的尖晶石型钴氧化物涂层电极。用扫描电镜和光学显微镜对电极表面形貌及断面组织进行了观察。在300g/l NaCl水溶液中测定了各电极析氯反应的恒电流电位—电流特性。结果表明:在单金属尖晶石Co₃O₄中掺杂二价异种金属离子M⁺⁺（M代表Ni、Cu、Zn）后电极析氯活性提高,双金属尖晶石M_xCo_3-xO₄（0<x<1）的活性随M种类的改变而变化很大,随M含量的增加而增大。表面形貌与Co₃O₄相似的Zn—Co尖晶石活性低于Ni—Co或Cu—Co尖晶石,NiCo₂O₄的析氯电位最接近Ru—Ti电极。更多还原

【Abstract】 The spinel-type cobalt oxide coated electrodes of different compositions were prepared by thermal decomposition of metal nitrates on Ti substrate The morphology of coating surface and cross-sectional structure were examined under SEM and optical microscope The potential-current curves for chlorine evolution on oxide-coated electrodes were also measured galvanostatically in 300g/l NaCl at 42℃. The results show that the activity for chlorine evolution of single metal spinel Co₃O₄ is improved when Co⁺⁺ is substituted by a "foreign ion", e.g., Ni^<sup>++, Cu⁺⁺ or Zn⁺⁺. The activity of bimetal spinel M_xCo_3-xO₄（M representing Ni, Cu, or Zn, 0<x≤1） varies considerably with the type of M and increases with the increased amount of M. The activity of Zn-Co spinel, which has the surface morphology similar to Co₃O₄, is much lower than that of Ni-Co or Cu-Co spinel. The chlorine evolution potential of NiCo₂O₄ is very close to that of the Ru-Ti electrode更多还原