Occidental Chemical Corporation

Hooker Chemicals & Plastics Corporation

Gerald F Pokrzyk

John Z Stachurski

Dirk Pouli

John A Ripa

A cathode for use in electrolytic processes and a process for preparing such cathodes is described. The cathode comprises a cathodically active surface layer applied to a suitable substrate material. The surface layer comprises a codeposit of a first metal selected from the group consisting of iron, cobalt, nickel, and mixtures thereof, and a second metal or metal oxide selected from the group consisting of molybdenum, manganese, titanium, tungsten, vanadium, indium, chromium, zinc, their oxides and combinations thereof. The surface layer is applied from an electroplating solution containing a soluble sulfur-containing compound, such as an alkali metal thiocyanate or thiourea.

Hydrogen cathode

A cathode for use in electrolytic processes and a process for preparing such cathodes is described. The cathode comprises a cathodically active surface layer, an intermediate binding layer, and a substrate. The intermediate binding layer comprises a codeposit of a first metal selected from the group consisting of iron, cobalt, nickel, and mixtures thereof, and a second metal or metal oxide selected from the group consisting of molybdenum, manganese, titanium, tungsten, vanadium, indium, chromium, zinc, their oxides, and combinations thereof. The intermediate binding layer is applied to the substrate from an electroplating solution containing a soluble sulfur-containing compound, such as an alkali metal thiocyanate or thiourea. The surface layer is applied to the intermediate binding layer and comprises a codeposit of said first and second metals or metal oxides and a third metal selected from the group consisting of cadmium, mercury, lead, silver, thallium, bismuth, copper and mixtures thereof.

Binding layer for low overvoltage hydrogen cathodes

A cathode for use in electrolytic processes and a process for preparing such cathodes is described. The cathode has a cathodically active surface comprising a codeposit of a first metal selected from the group consisting of iron, cobalt, nickel, and mixtures thereof, a leachable second metal or metal oxide preferably selected from the group consisting of molybdenum, manganese, titanium, tungsten, vanadium, indium, chromium, zinc, their oxides, and combinations thereof, and a third metal selected from the group consisting of cadmium, mercury, lead, silver, thallium, bismuth, copper and mixtures thereof. Such cathodes are prepared by initially forming a codeposit of the three metals or metal oxides, and subsequently removing at least a portion of the second metal or metal oxide from the codeposit. The second metal or metal oxide component can be conveniently removed by leaching, utilizing an alkaline solution. A substantially reduced hydrogen cathode overvoltage is obtained when the present cathodes are utilized in an electrolytic cell.

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Lewiston, NY, United States of America

Gerald F Pokrzyk