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Electroreductions of Co(Ⅱ) and Ni(Ⅱ) to metallic Co and Ni in urea NaBr melt at 393K are irreversible respectively in one step.La(Ⅲ) does not be reduced to La alone,but can be inductively codeposited with Co(Ⅱ) or Ni(Ⅱ).The amorphous La Co and La Ni alloy films were obtained by potentiostatic electrolysis.To some extent,the contents of La in La Co and La Ni deposits increase with the cathode potential shift to the negative direction.
Electroreductions of Co (II) and Ni (II) to metallic Co and Ni in urea NaBr melt at 393K are irreversible respectively in one step. La (III) does not be reduced to La alone, but can be inductively codeposited with Co ) or Ni (II). The amorphous La Co and La Ni alloy films were obtained by potentiostatic electrolysis.To some extent, the contents of La in La Co and La Ni deposits increase with the cathode potential shift to the negative direction.