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US4323595A Expired / Lapsed US ⏱️ 0.0 years remaining

Nickel-molybdenum cathode

Assignee: PPG Industries Ohio Inc
•
Filing: 1980-01-31
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Granted: 1982-04-06
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Expires: 2000-01-31
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Abstract

Abstract Disclosed herein is a cathode having an electroconductive substrate and a porous surface. The porous surface is characterized by containing a major portion of nickel and a hydrogen overvoltage reducing amount of molybdenum. The molybdenum may be present as elemental molybdenum, as an alloy with nickel, or as a molybdenum compound. Also disclosed is an electrolytic cell having an anode, a cathode, and a separator between the anode and cathode, where the cathode is characterized by a porous surface having a major portion of nickel and a hydrogen over voltage reducing amount of molybdenum, which molybdenum may be present as elemental molybdenum, and molybdenum alloy with nickel or a molybdenum compound. Further disclosed is a method of electrolyzing an alkali metal chloride brine by passing an electrical current from an anode to a cathode to evolve chlorine at the anode and hydroxyl ion at the cathode. The cathode is characterized by a porous surface containing a major portion of nickel and hydrogen overvoltage reducing amount of molybdenum. Also disclosed is a method of preparing a porous nickel electrode by flame spraying nickel bearing particles, leachable constituent bearing particles and molybdenum bearing particles onto a metal substrate and leaching out the leachable constituent whereby to form the porous surface.

Inventors

  • 👤 Cletus N. Welch
  • 👤 John O. Snodgrass

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 20:57
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/18; C25; C25B; C25B11/00; C25B11/04; C25B11/051; C25B11/073; C25B11/091

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 70 words
A method of preparing an electrode having a porous surface on a metal substrate comprising: (a) depositing an aqueous alkali metal hydroxide impermeable nickel film on the substrate; (b) flame spraying particles comprising an alloy of nickel and aluminum and separate particles comprising molybdenum onto the nickel film; and (c) leaching out said aluminum whereby to form a porous surface consisting essentially of nickel and molybdenum atop the porous film.
Claim 2
Independent Claim 70 words
A method of preparing an electrode having a porous surface on a metal substrate comprising: (a) depositing an aqueous alkali metal hydroxide impermeable nickel film on the substrate; (b) flame spraying particles comprising an alloy of nickel and aluminum and separate particles comprising molybdenum onto the nickel film; and (c) leaching out said aluminum whereby to form a porous surface consisting essentially of nickel and molybdenum atop the porous film.
Claim 3
Dependent Claim 30 words
The method of claim 1 wherein said molybdenum is chosen from the group consisting of elemental molybdenum, molybdenum carbide, molybdenum boride, molybdenum nitride, molybdenum oxide, molybdenum phosphide, and molybdenum sulfide.
Claim 4
Dependent Claim 18 words
The method of claim 1 wherein the nickel film is from about 20 to about 125 microns thick.
Claim 5
Dependent Claim 14 words
The method of claim 1 comprising electrodepositing the nickel film onto the metal substrate.
Claim 6
Dependent Claim 94 words
In a method of preparing an electrode having a porous surface on a metal substrate, comprising flame spraying particles of an alloy of nickel and aluminum onto the metal substrate, and thereafter leaching out the aluminum to form a porous nickel surface, the improvement comprising: (a) first electroplating an aqueous alkali metal hydroxide impermeable nickel film on the substrate; (b) thereafter flame spraying particles comprising molybdenum with the particles of nickel-aluminum alloy onto the electroplated substrate; and (c) thereafter leaching out aluminum whereby to form a porous surface consisting essentially of nickel and molybdenum.
Claim 7
Dependent Claim 94 words
In a method of preparing an electrode having a porous surface on a metal substrate, comprising flame spraying particles of an alloy of nickel and aluminum onto the metal substrate, and thereafter leaching out the aluminum to form a porous nickel surface, the improvement comprising: (a) first electroplating an aqueous alkali metal hydroxide impermeable nickel film on the substrate; (b) thereafter flame spraying particles comprising molybdenum with the particles of nickel-aluminum alloy onto the electroplated substrate; and (c) thereafter leaching out aluminum whereby to form a porous surface consisting essentially of nickel and molybdenum.

References Cited (Backward Citations)

US3674710A Cited
JPS4946523A Cited
US4080278A Cited
US4049841A Cited
US4024044A Cited
US4033837A Cited
US4049580A Cited
US4153578A Cited
US4251478A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-04-05 1985-10-05 1986-04-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-04-05 1989-10-05 1990-04-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-04-05 1993-10-05 1994-04-06 $7700.00 Window Closed / Lapsed

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