• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An electrode for use in electrolytic processes comprises a substrate of film-forming metal such as titanium having a porous electrocatalytic coating comprising at least one platinum-group metal and/or oxide thereof possibly mixed with other metal oxides in an amount of at least about 2 g/m<2> of the platinum-group metal(s) per projected surface area of the substrate. Below the coating is a preformed barrier layer constituted by a surface oxide film grown up from the substrate. This preformed barrier layer has rhodium and/or iridium as metal or compound incorporated in the surface oxide film during formation thereof in an amount of up to 1 g/m<2> (as metal) per projected surface area of the substrate.
    公开号:SU1292670A3
    申请号:SU802990890
    申请日:1980-10-04
    公开日:1987-02-23
    发明作者:Бернард Бир Генри；Марсель Хинден Джин
    申请人:Даймонд Шамрок Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    II 2
    Inventions from Osit to technical and electro-chemical production, in particular to the electrode used in them.
    The purpose of the invention is to increase the service life of the electrode.
    Example 1 ia both sides of purified by degreasing, powdered water, drying and 30-minute etching in oxalic acid titanium sheets with a size of 1 to 2 cm are applied to a solution consisting of 6 mp n-propanol, 0.4 ml of concentrated x, hydrochloric acid and 0 1 g of iridium chloride. The solution is applied four times, and after the end of each stage of application of the solution, the sheets are dried to evaporate the solvent and then heat treated at 50 and ° C in the presence of air for 10 minutes (after finishing each of the first three stages) or for 30 minutes (after finishing of the last stage). At the same time, an intermediate layer is formed on titanium sheets containing
    0.2 g / m iridi, (in terms of ms - tall). On the intermediate layer; made in one piece with a titanium base, a porous elactrocatalytic coating is applied from a solution containing 6 ml of n-propanolola 0.4 ml of concentrated hydrochloric acid, 3 ml of butyl titanate and 1 g of ruthenium chloride. The application is carried out until a coating thickness of 10 g / m is reached (ruthenium per metal)
    Example 2 Example 1 is repeated, with the difference that a solution containing 0.2 g of iridium chloride is applied to the ejector of the intermediate layer, and the application is carried out in ten stages, and after the last stage, the heat treatment is carried out at 500 ° C. B for 30 min. At the same time, an interlayer layer containing 1 g / m iridium (in terms of metal) is obtained,
    Example 3. Primo 1 is repeated, with the difference that d / 1a of the intermediate layer is applied with a solution containing 0.1 g:; crusty rhodium and application is carried out in four stages, moreover, after the last stage, heat treatment / water t at 500 ° C for 30 minutes At the same time receive interim layers
    0
    g / m rhodi (in the middle of metafl), II p. 4. Repeat example i With the difference that plant is used for the intermediate layer, containing 0.2 g of the rhodistor. m 5 and deposition is carried out in ten stages, and after the end of the last stage, the heat treatment is carried out at 500 ° C for 30 minutes.
    An intermediate layer is obtained.
    - - / / containing; IVM give birth (in terms of
    ira metal),
    Example 5. Example I is repeated with the difference that, -: a solution containing O ,, 5 g of indium chloride and 0.05 G of rhodium chloride, and .1-; stage, and after the end of the last; the heat treatment steps were carried out ::; and 500 ° C for 30 microns. With this nojjvMaroT
    intermediate layers containing 7
    Shi 0.1 g / m iridium and 0.1 g / m rhodi (in terms of metal).
    PRI m E: p 6, Example i is repeated, with the difference that to perform -;: and intermittent PR (5% of the layer used is a solution containing Oji, 1 g of iridium chloride and 0; g xjfopHCToro give birth, and : The colors are ten in the state:,; and, after the end of the last stage, the heat treatment is carried out at 500 ° C for 30 minutes. At the same time, the intermediate layer containing 0.5 g / m iridium and 0 is removed. 5 g / m ro-; and (in re: g ;; ete on the metal).
    EXAMPLE 7 An example is repeated with the difference that the solution used for the intermediate layer is a solution, containing 0.1 g of iridium chloride and 0–5 g of ruthenium chloride. Pr :: :: - 1 this thermal breaker is conducted; after the termination: where the nano-saNy stage is carried out at 400 ° C for 10 minutes. An intermediate layer is obtained, supporting 0.2 g / m iridium. 0.1 g / m
    ; j
    on metaplans).
    EXAMPLE 8 Example 1 is repeated ;; the same time that a vegetable layer was used to fill the intermediate layer, containing 0.1 g of iridium chloride and 0.5 g of palladium chloride. Y pA this is the heat treatment5 carried out by the g-oil end, the 01st stage of the night, carried out at 400 ° C for 10 minutes. Get intermediate
    a layer containing 0.2 g / m iridium and O, g / m palladium (in terms of metal),
    Example 9. Example 1 is repeated with the difference that a solution containing O, 1 g of iridium chloride and 0.05 g of ruthenium chloride is used to make the NIN intermediate layer. This heat treatment carried out after the termination of each stage of application is carried out at 400 C for 10 min. An intermediate layer is obtained containing 0.2 g / m iridium and O, 1 g / m ruthenium (in terms of metal).
    In addition, a solution containing 0.5 g of iridium chloride and 0.5 g of tantalum chloride is used to form the porous electrocatalytic coating. In this case, the heat treatment carried out after the termination of each stage of application (a total of ten) is carried out at 450 ° C in air for 10 minutes (after the first nine stages) or 60 minutes (after the last stage). The resulting coating contains 2.5 g / m iridium and 2.5 g / m tantalum (in terms of metal).
    The life of the electrodes according to examples 1-9 is determined in a solution of sulfuric acid (150 g / l) at 70 ° C and a current density of 7.5 kA / m.
    The results of the experiments:
    Electrode Service life, h
    152.5
    264.2
    352.1
    463.9
    552.7
    664.8
    752.9
    852,8
    953.6
    A 35.9
    , 6
    B 164.3
    ,one
    28.5
    33.8 50 Compiled by T
    Editor V. Petrash
    Tehred A. Kravchuk
    Order 291/60 Circulation 613 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, Proektna St., 4
    ABOUT
    0
    ABOUT
    five
    0
    five
    five
    T
    1. The electrode is obtained in accordance with example I with the difference that the intermediate layer contains only O, I g / m iridium (based on metal).
    2. The electrode is obtained in accordance with example 3 with the difference that the intermediate layer contains only O, I g / m rod (in terms of metal).
    3. The electrode is obtained in accordance with example 2 with the difference that the intermediate layer contains
    1, I gOhm irid (calculated per metal).
    4. The electrode is obtained in accordance with example 4 with the difference that the intermediate layer contains
    1.1 g / m rhode (per metal). I
    5. The electrode (known) includes a titanium base and a preliminarily formed intermediate layer of. titanium oxide films on a base made in one piece with the base,
    and porous electrocatalytic coating containing 0.2 g / m iridium and 0.025 g / m lithium,
    I
    6. Electrode (known) electrocatalytic coating which contains another 4 g / m of ruthenium.
    A comparison of the results on the service life of the electrodes 1-4 and the corresponding comparative electrodes A, B, VIG shows that when the content is iridium or O, f g / m, the objective of the invention is practically not achieved, and when the upper limit is exceeded (1.0 g / m a) iridi or birth content is not further enhanced. In addition, a comparison of the results of service life. electrodes 1, 7 and 8 indicates a further increase in service life with the additional presence of a platinum group metal. In comparison with the known electrode, the service life of the electrodes I, 7, D and E is significantly
    is increased. Barabash
    Proofreader L. Pilipenko
    权利要求:
    Claims (2)
    [1]
    1. ELECTRODE FOR ELECTROCHEMISTRY
    OF THE CLEAN PROCESSES, containing a titanium base, an intermediate layer of titanium oxides and a porous electrocatalytic coating containing at least one platinum group metal and / or its oxide, characterized in that, in order to increase the electrode service life, the intermediate layer additionally contains rhodium and / or iridium in an amount of 0.2-1 g / m * 2 of the surface of the base (in terms of metal).
    [2]
    2. The electrode according to π. 1, characterized in that the intermediate layer further comprises ruthenium or palladium.
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    同族专利:
    公开号 | 公开日
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL122179C|1959-02-06|1966-12-15|
    GB1206863A|1968-04-02|1970-09-30|Ici Ltd|Electrodes for electrochemical process|
    US3775284A|1970-03-23|1973-11-27|J Bennett|Non-passivating barrier layer electrodes|
    GB1351741A|1970-03-25|1974-05-01|Marston Excelsior Ltd|Electrodes|
    US3926773A|1970-07-16|1975-12-16|Conradty Fa C|Metal anode for electrochemical processes and method of making same|
    US3711385A|1970-09-25|1973-01-16|Chemnor Corp|Electrode having platinum metal oxide coating thereon,and method of use thereof|
    DE2255690C3|1972-11-14|1985-01-31|Conradty GmbH & Co Metallelektroden KG, 8505 Röthenbach|Anode for electrochemical processes|
    NL7502841A|1975-03-11|1976-09-14|Stamicarbon|METHOD OF MANUFACTURING A METAL ELECTRODE.|
    US4112140A|1977-04-14|1978-09-05|The Dow Chemical Company|Electrode coating process|CA1190186A|1980-08-18|1985-07-09|Henri B. Beer|Electrode with mixed oxide interface on valve metalbase and stable outer coating|
    DE3270207D1|1981-04-06|1986-05-07|Eltech Systems Corp|Recoating of electrodes|
    EP0103014A1|1982-03-11|1984-03-21|Engelhard Corporation|PROMOTION OF Pt-Ir CATALYTIC ELECTRODES WITH LEAD, TANTALUM, RUTHENIUM AND OXYGEN|
    JPH036232B2|1982-03-31|1991-01-29|Ishifuku Metal Ind|
    CH649315A5|1982-09-22|1985-05-15|Bbc Brown Boveri & Cie|Method of producing an electrode, and electrode for an electrochemical cell|
    JPS6022075B2|1983-01-31|1985-05-30|Perumeretsuku Denkyoku Kk|
    JPH0726240B2|1989-10-27|1995-03-22|ペルメレック電極株式会社|Electrolytic pickling or electrolytic degreasing method for steel sheet|
    LU88516A1|1993-07-21|1996-02-01|Furukawa Electric Co Ltd|Electrode for generating oxygen - obtd. by coating and depositing titanium cpd. on surface of base material, applying pyrolysis to titanium cpd., under oxygen@-contg. atmos.|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB7934856|1979-10-08|
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