EP0169301B1 - Electrode composite, procédé pour sa fabrication et ses applications - Google Patents

Electrode composite, procédé pour sa fabrication et ses applications Download PDF

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Publication number
EP0169301B1
EP0169301B1 EP85102924A EP85102924A EP0169301B1 EP 0169301 B1 EP0169301 B1 EP 0169301B1 EP 85102924 A EP85102924 A EP 85102924A EP 85102924 A EP85102924 A EP 85102924A EP 0169301 B1 EP0169301 B1 EP 0169301B1
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EP
European Patent Office
Prior art keywords
anode according
composite oxygen
titanium
oxygen anode
electrically conductive
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EP85102924A
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German (de)
English (en)
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EP0169301A1 (fr
Inventor
Christina Modes
Heinrich Dr. Meyer
Jochen-Werner Kühn- von Burgsdorff
Ulrich Dr. Ströder
Andrea Krämer
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WC Heraus GmbH and Co KG
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WC Heraus GmbH and Co KG
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/042—Electrodes formed of a single material
    • C25B11/043—Carbon, e.g. diamond or graphene
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/02—Electrodes; Connections thereof

Definitions

  • the invention relates to a composite electrode made of an electrically conductive base body and partially embedded therein catalytic particles of catalyst applied to carrier particles, a process for their production and their use.
  • Anodes with the lowest possible oxygen overvoltage are required for electrolysis processes which take place under anodic oxygen development, for example for the electrolytic extraction of metal from aqueous solutions and for electrochemical reductions of organic compounds.
  • Anodes made of lead alloys with a small amount of calcium, cobalt or silver are currently used for the electrolytic extraction of copper and zinc.
  • Lead anodes are also used in organic electrosynthesis. They are relatively inexpensive and can be used for several years. Disadvantages are the relatively high oxygen overvoltage, the corrosion of the lead which leads to contamination of the electrolysis products and the weight of the anodes, which makes handling more difficult.
  • Such activated electrodes with lower overvoltage values can, as described in German Patent 1571 721, consist of a core made of film-forming metal or valve metal (titanium, tantalum, zirconium, niobium or an alloy of these metals) and an electrochemically active coating of platinum group metal oxides and optionally base metal oxides .
  • This type of electrode has found widespread use as a dimensionally stable anode in chlorine production.
  • European patent 46 448 proposes a layer of electrically conductive, insoluble polymer network between the substrate and the outer coating in order to protect the electrode substrate, which is made, for example, of titanium.
  • the polymer network can contain, as a finely divided, electrically conductive material, a catalyst composed of one or more platinum group metals, also in the form of the oxides, and is generated in situ on the electrode substrate.
  • European patent application 46 727 describes dimensionally stable anodes which are particularly suitable for the electrolytic extraction of metal from acidic solutions and have an enlarged active surface made of lead or a lead alloy with catalytic particles partially embedded in the surface.
  • the catalytic particles consist of valve metal, for example titanium, and then, in metallic or oxidic form, platinum group metal applied as a catalyst by thermal decomposition.
  • Base metal catalysts for example made of manganese oxide, are also possible.
  • European patent application 62 951 discloses electrodes made of lead plates and particles pressed into their surface made of carrier particles coated with platinum group metal (oxide) in finely divided form as plastic containing catalyst, for example made of titanium sponge.
  • European patent application 87 186 consist of lead or lead alloys and particles of titanium and / or titanium oxide (rutile) partially embedded in their surface and ruthenium oxide and possibly manganese oxide and Titanium oxide.
  • the electrodes described in the GDR patent specification 150,764 also contain metals or metal compounds with electrocatalytic properties, but applied to graphite.
  • the porous graphite base of these electrodes contains in their pores the electrochemically active metals or metal compounds and an electrochemically inert organic material, for example polystyrene, polyethylene, polymethyl methacrylate, polyvinyl chloride or polyester acrylate.
  • anodes with a catalytic surface to be used are known from European patent application 90 381. They consist of an electrically conductive composite material made of carbon or graphite and plastic, especially a thermoplastic fluorine-containing polymer, the surface of which is provided with an electrocatalytic layer made of chemically inert plastic and a finely divided catalyst consisting of noble or base metal (oxide).
  • the active surface of these anodes is considerably smaller than that described in European patent application 46 727 and is intended to be increased by mechanical roughening. Relatively large amounts of catalyst are also required.
  • the active surface should consist of catalytic particles made of carrier particles with an electrochemically active catalyst applied to them.
  • the composite electrode representing the solution to this problem is characterized in accordance with the invention in that the base body consists of electrically conductive plastic.
  • the electrically conductive plastic preferably has a thickness of at least 2 mm and preferably contains finely divided carbon as the electrically conductive material.
  • the electrically conductive plastic with an electrical resistance less than 103 0 mm preferably consists of a suitable plastic and evenly distributed fine-particle carbon, for example in the form of carbon black or graphite. Its outer shape is chosen according to the purpose. Panels with a thickness of at least 2 mm have proven particularly useful.
  • thermoplastics with sufficient chemical resistance are particularly suitable as plastics.
  • plastics are polyethylene, polypropylene, polystyrene, polymethacrylates, polyester acrylates, polyamides, polyacetals, polycarbonates, polytetrafluoroethylene, copolymers of tetrafluoroethylene, such as tetrafluoroethylene-ethylene and tetrafluoroethylene-perfluoropropylene copolymer, and polytrifluorochloride, polytrifluorochloride.
  • the choice of plastic depends on the electrolysis conditions, such as electrolyte composition and current density. In 15% sulfuric acid with anodic current densities up to 1 kA / m 2 , polyethylene, polypropylene and polytetrafluoroethylene have proven particularly useful.
  • the electrically conductive plastic then preferably consists of one of these polymers and 5-80% by weight graphite with a particle size below 150 J, Lm or 7.5-25% by weight carbon black with a particle size below 0.02 ⁇ m.
  • the plastic can also contain other electrically conductive materials, such as metals or metal oxides. Electrically conductive polymers can also be used as electrically conductive plastics.
  • the composite electrode according to the invention preferably contains the platinum group metals ruthenium, iridium, palladium, platinum and / or rhodium as metal and / or oxide as the electrochemically active catalyst.
  • Catalysts made from one or more platinum group metals and / or platinum group metal oxides and one or more of the base metals titanium, zirconium hafnium, niobium, tantalum, manganese, iron, cobalt, nickel, tin, lead, antimony and bismuth as metal and / or oxide have proven particularly useful .
  • the oxidic catalysts containing several metals can be mixtures of the individual oxides and / or mixed oxides.
  • Titanium sponge especially with a particle size between 0.2 and 1.0 mm, and titanium oxides of the general formula Ti0 2 - x with 0 ⁇ x ⁇ 1, especially with a particle size between 0.03 and 0.5 mm, are used as carriers , prefers.
  • Powdered titanium, zirconium, niobium or tantalum can also be used.
  • Catalytic particles consisting of the carrier particles and the catalyst applied thereon which are suitable for the composite electrodes according to the invention can be produced by all methods known for this purpose (see, for example, European patent application 46 727).
  • the composite electrode with a metallic current distributor, for example made of an expanded metal or metal mesh.
  • the current distributor can consist, for example, of copper, iron, cobalt, nickel, alloys of these metals, aluminum, lead, titanium, zirconium, hafnium, niobium, tantalum, molybdenum or tungsten.
  • a current distributor it is advantageously first connected to the electrically conductive plastic at elevated temperature under pressure when producing the composite electrode; then the catalytic particles are applied to the plastic.
  • Electrically conductive plastic in plate or granulate form and current distributor are permanently and firmly anchored in one another by pressing the current distributor in at a temperature between 140 and 380 ° C. and under a pressure of 0.1-2 t / cm 2 for 0.5-10 minutes . Then the catalytic particles are applied evenly to the plastic and partially at a temperature between 140 and 380 ° C and under a pressure of 0.1-2 t / cm 2 , preferably 0.5-10 minutes in the surface of the plastic pressed in.
  • Figures 1, 2 and 3 represent partial sections of three embodiments of the composite electrode according to the invention.
  • the current distributor 1 is covered on one side by the electrically conductive plastic 2 with the catalytic particles 3 partially pressed into its surface. Since the current distributor comes into contact with the electrolyte in this embodiment, the current distributor here consists of chemically resistant metal. Current distributors made of expanded titanium have proven particularly useful in aqueous acidic electrolytes.
  • the current distributor 1 is covered on both sides by the electrically conductive plastic 2 with the catalytic particles 3 partially pressed into its surfaces. Since here the plastic protects the current distributor from the corrosive action of the electrolyte, in this embodiment the current distributors can consist of other, in part cheaper and more electrically conductive metals, for example copper.
  • FIG. 3 shows an embodiment similar to that shown in FIG. 2. However, only one surface of the composite electrode is covered with the catalytic particles 3.
  • the composite electrode according to the invention can be used as an oxygen anode in metal extraction electrolysis, in electroplating, in the electrochemical reduction of organic compounds and in electrocoating.
  • Examples 1 to 5 bund electrodes as oxygen anodes in an electrolysis cell with sulphate electrolyte (150 g of H 2 S0 4/1, 50 ° C) used cathode and platinum.
  • the power distributor and the disk made of Novolen KR 1682 are placed in a press die heated to 185 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.1 t / cm2. Then 0.8 g of the activated titanium sponge (catalytic particles) are evenly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 25 g.
  • the power distributor and the Lupolen 5261 Z disc are placed in a press die heated to 150 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.15 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 140 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 25 g.
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10 percent oxalic acid at 90 ° C. for 30 minutes, washed with water and dried
  • the power distributor and the Colcolor disc are placed in a press die heated to 180 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.5 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.5 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 25 g.
  • the power distributor and the disk made of Novolen KR 1682 are placed in a press die heated to 185 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.1 t / cm 2 . Then 0.3 g of the activated titanium oxide (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 185 ° C. with a pressure of 0.1 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 300 g / m 2 electrode surface with an Ru content of 15 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10 percent oxalic acid at 90 ° C. for 30 minutes, washed with water and dried
  • 2.5 g of granules of Hostaflon TF 4215 are filled into a press die, uniformly distributed and shaped into a disc (diameter 36 mm, thickness 2 mm) by pressing for 1 minute at room temperature with a pressure of 0.2 t / cm 2 .
  • the power distributor is then placed on the pane, covered with 2.5 g of Hostaflon TF 4215 granules and firmly pressed with the Hostaflon TF 4215 on both sides by pressing for 0.5 minutes at room temperature with a pressure of 0.05 t / cm 2 connected.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 25 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Titanium sponge with a grain size of 0.4-0.85 mm pickled with 10 percent oxalic acid at 90 ° C for 30 minutes, washed with water and dried
  • the power distributor and the Nololen KR 1682 disc are placed in a press die heated to 185 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.1 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are evenly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of catalytic particles corresponds to 800 g / m 2 electrode surface with a (Pt + Ir) content of 8 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10 percent oxalic acid at 90 ° C. for 30 minutes, washed with water and dried
  • the treatment with the impregnation solution and the heat treatment are repeated until a ruthenium content of 27.5 mg and a manganese content of 34.9 mg per 1 g of titanium sponge is reached.
  • the power distributor and the disk made of Novolen KR 1682 are placed in a press die heated to 185 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.1 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are evenly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 22 g and an Mn content of 27.9 g.
  • Expanded copper metal pickled with dilute nitric acid (mesh length 21 mm, mesh width 9 mm and web thickness 0.8 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Titanium sponge with a grain size of 0.4-0.85 mm pickled with 10 percent oxalic acid at 90 ° C for 30 minutes, washed with water and dried
  • the treatment with the impregnation solution and the heat treatment are repeated until an Ru content of 20 mg / 1 g titanium sponge and an Ir content of 10 mg / 1 g titanium sponge is reached.
  • the power distributor and the Lupolen 5261 Z disc are placed in a press die heated to 150 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.15 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 140 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ir content of 8 g and an Ru content of 16 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Washer (diameter 36 mm, thickness 4 mm) made of Colcolor from Degussa, Frankfurt (polypropylene with 25% by weight carbon black)
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10 percent oxalic acid at 90 ° C. for 30 minutes, washed with water and dried
  • the power distributor and the Colcolor disc are placed in a press die heated to 180 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.5 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.5 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 15 g and an Fd content of 5.5 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Titanium sponge with a grain size of 0.4-0.85 mm pickled with 10 percent oxalic acid at 90 ° C for 30 minutes, washed with water and dried
  • the Ru-containing titanium sponge is exposed to a temperature of 300 ° C, 430 ° C and 400 ° C for 10 minutes in an oven.
  • the power distributor and the Lupolen 5261 Z disc are placed in a press die heated to 150 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.15 t / cm 2 . Then 0.8 g of the activated titanium sponge (catalytic particles) are evenly distributed on the disk and pressed into the surface of the disk at 140 ° C. with a pressure of 0.2 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with an Ru content of 12.5 g.
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10 percent oxalic acid at 90 ° C. for 30 minutes, washed with water and dried
  • the disk made of Novolen KR 1682 is placed in a press die heated to 185 ° C. After 10 minutes (temperature compensation), 0.7 g of the activated titanium sponge (catalytic particles) are evenly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.2 t / cm 2 for 1 minute .
  • the amount of catalytic particles corresponds to 700 g / m 2 electrode surface with an Ru content of 20 g, a Mn content of 13.7 g and an Sn content of 5.8 g.
  • Titanium expanded metal blasted with corundum and pickled with hydrochloric acid (mesh length 10 mm, mesh width 5.7 mm and web thickness 1 mm) with a power supply made of titanium wire (diameter 2 mm)
  • Washer (diameter 36 mm, thickness 4 mm) made of Colcolor from Degussa, Frankfurt (polypropylene with 25% by weight carbon black)
  • Titanium sponge with a grain size of 0.4-0.85 mm treated with 10% oxalic acid at 90 ° C. for 30 minutes, washed with water and dried.
  • the titanium sponge is placed on a sheet and placed together with the sheet as the cathode in the 75 ° C solution for the electroplating.
  • 100 mg Pt / 1g titanium sponge are deposited within 12 minutes at a cathodic current density of 11 mA / cm2.
  • the power distributor and the Colcolor disc are placed in a press die heated to 180 ° C. After 10 minutes (temperature compensation), the power distributor and the pane are connected to one another by pressing for 1 minute at a pressure of 0.5 t / cm 2 . Then 0.2 g of the activated titanium sponge (catalytic particles) are uniformly distributed on the disk and pressed into the surface of the disk at 180 ° C. with a pressure of 0.5 t / cm 2 for 1 minute.
  • the amount of the catalytic particles corresponds to 800 g / m 2 electrode surface with a Pt content of 20 g.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)
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Claims (20)

1. Anode composite à oxygène constituée d'un corps de base non poreux conducteur de l'électricité et de particules catalytiques, partiellement enrobées dans sa surface, d'un catalyseur déposé sur des particules de support, caractérisée en ce que le corps de base consiste en une matière plastique conductrice de l'électricité.
2. Anode composite à oxygène selon la revendication 1, caractérisée en ce que la matière plastique conductrice de l'électricité a une épaisseur d'au moins 2 mm.
3. Anode composite à oxygène selon la revendication 1 ou 2, caractérisée en ce que la matière plastique conductrice de l'électricité contient comme matière conductrice de l'électricité du carbon en fines paticules.
4. Anode composite à oxygène selon la revendication 3, caractérisée en ce que la matière plastique conductrice de l'électricité consiste en une matière thermoplastique et en du carbone en fines particules.
5. Anode composite à oxygène selon l'une des revendications 1 à 4, caractérisée en ce que le catalyseur contient un ou plusierus des métaux du groupe du platine: ruthénium, iridium, palladium, platine et rhodium, sous forme de métal et/ou d'oxyde.
6. Anode composite à oxygène selon la revendication 5, caractérisée en ce que le catalyseur consiste en un ou plusieurs des métaux du groupe du platine à l'état de métal et/ou d'oxyde et en un ou plusieurs métaux non nobles à l'état de métal et/ou d'oxyde.
7. Anode composite à oxygène selon la revendication 6, caractérisée en ce que le métal non noble est le titane, le zirconium, le hafnium, le niobium, le tantale, le manganèse, le fer, le cobalt, le nickel, l'étain, le plomb, l'antimoine et/ou le bismuth.
8. Anode composite à oxygène selon la revendication 6 ou 7, caractérisée en ce que le catalyseur consiste en oxyde de ruthénium-titane.
9. Anode composite à oxygène selon l'une des revendications 1 à 8, caractérisée en ce que les particules de support consistent en titane, zirconium, niobium ou tantale.
10. Anode composite à oxygène selon la revendication 9, caractérisée en ce que les particules de support consistent en éponge de titane.
11. Anode composite à oxygène selon la revendication 10, caractérisée en ce que la dimension des particules de l'éponge de titane est comprise entre 0,2 et 1,0 mm.
12. Anode composite à oxygène selon l'une des revendications 1 à 8, caractérisée en ce que les particules de support consistent en oxyde de titane de formule générale Ti02-x, dans laquelle 0<x< 1.
13. Anode composite à oxygène selon la revendication 12, caractérisée en ce que la dimension des particules d'oxyde de titane est comprise entre 0,03 et 0,5 mm.
14. Anode composite à oxygène selon l'une des revendications 1 à 13, caractérisée en ce qu'un répartiteur de courant métallique est noyé dans la matière plastique conductrice de l'électricité.
15. Anode composite à oxygène selon la revendication 14, caractérisée en ce que le répartiteur de courant consiste en un métal déployé ou en un treillis métallique.
16. Anode composite à oxygène selon la revendication 14 ou 15, caractérisée en ce que le répartiteur de courant consiste en titane.
17. Anode composite à oxygène selon la revendication 14 ou 15, caractérisée en ce que le répartiteur de courant consiste en cuivre ou en aluminium.
18. Procédé de fabrication d'une anode composite à oxygène selon l'une des revendications 1 à 17, caractérisée en ce que les particules catalytiques sont distribuées uniformément sur la matière plastique conductrice de l'électricité et sont partiellement enfoncées dans la surface de la matière plastique conductrice de l'électricité sous pression à température élevée.
19. Procédé de fabrication d'une anode composite à oxygène selon la revendication 18, caractérisée en ce que la matière plastique conductrice de l'électricité est pressée avec un répartiteur de courant métallique sons pression à température élevée.
20. Utilisation de l'anode composite à oxygène selon l'une des revendications 1 à 17 dans l'électrolyse de récupération des métaux dans des solutions acides avec une densité de courant anodique de 0,3 - 1 kA/m2.
EP85102924A 1984-06-27 1985-03-14 Electrode composite, procédé pour sa fabrication et ses applications Expired - Lifetime EP0169301B1 (fr)

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Application Number Priority Date Filing Date Title
DE3423605 1984-06-27
DE19843423605 DE3423605A1 (de) 1984-06-27 1984-06-27 Verbundelektrode, verfahren zu ihrer herstellung und ihre anwendung

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EP0169301A1 EP0169301A1 (fr) 1986-01-29
EP0169301B1 true EP0169301B1 (fr) 1990-02-21

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US (1) US4765874A (fr)
EP (1) EP0169301B1 (fr)
JP (1) JPS6130690A (fr)
AU (1) AU573855B2 (fr)
CA (1) CA1274805A (fr)
DE (2) DE3423605A1 (fr)
FI (1) FI78738C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4040835A1 (de) * 1990-01-31 1991-08-01 Intevep Sa Elektrokatalysator fuer die oxidation von methan und elektrolytisches verfahren

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Publication number Priority date Publication date Assignee Title
EP0296167B1 (fr) 1986-03-03 1993-06-02 Ppg Industries, Inc. Procede de depot electrolytique cationique utilisant des anodes resistant a la dissolution
US4886572A (en) * 1987-12-14 1989-12-12 Ricoh Company, Ltd. Composite electrode comprising a bonded body of aluminum and electroconductive polymer and electric cell using such a composite electrode
WO1991002359A1 (fr) * 1989-08-04 1991-02-21 Drexler Technology Corporation Accumulateur reparti de conversion d'energie
GB8927377D0 (en) * 1989-12-04 1990-01-31 Univ Edinburgh Improvements in and relating to amperometric assays
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FI78738C (fi) 1989-09-11
EP0169301A1 (fr) 1986-01-29
FI852524L (fi) 1985-12-28
CA1274805A (fr) 1990-10-02
FI78738B (fi) 1989-05-31
FI852524A0 (fi) 1985-06-26
JPS6257717B2 (fr) 1987-12-02
AU573855B2 (en) 1988-06-23
DE3576082D1 (de) 1990-03-29
AU4419485A (en) 1986-01-02
JPS6130690A (ja) 1986-02-12
DE3423605A1 (de) 1986-01-09
US4765874A (en) 1988-08-23

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