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A new process for electrolytic production of a perfluorinated compound, (CF_3)_3N, using lanthanum nickel oxide-coated Ni sheet anode in the (CH_3)_4NF·4.0HF melt at room temperature, was developed. Thin films of the lanthanum nickel oxides were prepared on Ni sheets by sol-gel coating method using polyvinlylpyrrolidone(PVP). The main components of the thin films were La_2O_3, LaNiO_3, and La_2NiO_4 at 500, 750 and 1000 ℃, respectively. The anode performance in the (CH_3)_4NF·4.0HF melt depends greatly on the main component of the thin film, and the LaNiO_3-coated Ni sheet anode gives the best anode performance. The potential of LaNiO_3-coated Ni sheet anode remains constant at 5.9 V during electrolysis at 20 mA·cm -2 in the (CH_3)_4NF·4.0HF melt for 100 h. This is because LaNiO_3 and NiF_3 and/or Ni_2F_5, the latter of which was formed during electrolysis, in the film give a high electronic conductivity to the surface film during electrolysis. The maximum mole fraction of (CF_3)_3N (21.4%) was obtained at 20 mA·cm -2 in (CH_3)_4NF·4.0HF melt using the LaNiO_3-coated Ni sheet.
A new process for electrolytic production of a perfluorinated compound, (CF_3) _3N, using lanthanum nickel oxide-coated Ni sheet anode in the (CH_3) _4NF · 4.0HF melt at room temperature, was developed. Thin films of the lanthanum nickel oxides were prepared on Ni sheets by sol-gel coating method using polyvinlylpyrrolidone (PVP). The main components of the thin films were La 2 O 3, LaNiO 3, and La 2 NiO 4 at 500, 750 and 1000 ° C., respectively. The anode performance in the (CH 3) 4.0HF melt depends greatly on the main component of the thin film, and the LaNiO_3-coated Ni sheet anode gives the best anode performance. The potential of LaNiO_3-coated Ni sheet anode remains constant at 5.9 V during electrolysis at 20 mA · cm - 2 in the (CH_3) _4NF · 4.0HF melt for 100 h. This is because LaNiO_3 and NiF_3 and / or Ni_2F_5, the latter of which was formed during electrolysis, in the film give a high electronic conductivity to the surface film during electrolysis. The maximum mole fraction of (CF_3) _3N (21.4%) was obtained at 20 mA · cm -2 in (CH_3) _4NF · 4.0 HF melt using the LaNiO_3-coated Ni sheet.