Low hydrogen overvoltage electrode
AssigneeAsahi Glass Company, Limited
InventorsYoshio Oda, Hiroshi Otouma, Eiji Endoh
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Abstract
This invention presents low hydrogen overvoltage electrode which comprises a plated metal layer of nickel or cobalt which contains partially exposed particles made of nickel or cobalt on an electrode substrate, the surface of which particles does not contain oxygen, which concentration is more than 150 ppm, and process for preparing such electrode, which comprises codepositing electrically and electrophoretically nickel or cobalt particles with nickel or cobalt from a dispersed solution which contains Cl.sup.- of the concentration of not less than 30 gCl.sup.- /l solution.
Claims9
In an electrode which comprises a metal layer comprising at least nickel or cobalt on an electrode substrate, the improvement comprising:
- said metal layer comprising partially exposed metal particles comprising at least Raney nickel alloy or Raney cobalt alloy, the surfaces of which have an oxygen concentration of 47 to 150 ppm, and said metal layer being formed by codepositing said metal and said particles from a dispersion containing metal particles comprising at least Raney nickel alloy or Raney cobalt alloy, at least 30 g/l of Cl.sup.- ions, and Co ions or Ni ions and having a pH of about 1.5 to about 2.
Dependencies are inferred from the claim text.