EP3492631B1 - Elektrolytische elektrode und herstellungsverfahren dafür - Google Patents

Elektrolytische elektrode und herstellungsverfahren dafür Download PDF

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EP3492631B1
EP3492631B1 EP18843984.8A EP18843984A EP3492631B1 EP 3492631 B1 EP3492631 B1 EP 3492631B1 EP 18843984 A EP18843984 A EP 18843984A EP 3492631 B1 EP3492631 B1 EP 3492631B1
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Prior art keywords
electrode
electrolysis
metal precursor
coating solution
amine
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French (fr)
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EP3492631A1 (de
EP3492631A4 (de
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Jongwook JUNG
Gyo Hyun Hwang
Jungup BANG
Yongju Bang
Dongchul Lee
Yeonyi KIM
Heejun EOM
Myunghun Kim
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LG Chem Ltd
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LG Chem Ltd
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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
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells
    • 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
    • C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
    • C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
    • C25B11/093—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds at least one noble metal or noble metal oxide and at least one non-noble metal oxide

Definitions

  • the present disclosure relates to an electrode for electrolysis and a preparation method of the same according to claims 1 and 6. More particularly, the present disclosure relates to an electrode for electrolysis that is capable of stabilizing an overvoltage value of the electrode for electrolysis and improving durability by increasing a needle-like structure, and a preparation method of the same.
  • the chlor-alkali process is a process to produce chlorine (Cl 2 ) and sodium hydroxide (NaOH) by electrolysis of salt water, which is industrially useful since it can mass-produce two materials that are widely used as basic materials in the petrochemical industry.
  • the chlor-alkali process is carried out in a chlor-alkali membrane or in a diaphragm electrolytic cell having an electrode for electrolysis containing an electrolytic catalyst.
  • an overvoltage must be applied to overcome various intrinsic resistances of a cell in addition to the theoretically required voltage. It is desirable to develop a method that minimizes the overvoltage requirement, since such overvoltage reduction will significantly save energy costs associated with cell operation.
  • US7959774 discloses a cathode for hydrogen generation that was coated to have a catalytic layer thereon containing at least Pt, Ce and La, the ratio of rare earth to Pt is 1:1 in example 1.
  • the coating is done using e.g. a solution of diamminedinitroplatinum, cerium nitrate and lanthanum nitrate in a solvent of e.g. alcohol.
  • the coating solution is dried and baked at 500 °C for 10 minutes.
  • an electrode material layer mainly composed of ruthenium oxide is formed on a metal substrate, and further a porous and low-active protective layer is formed on the surface thereof, thus improving the durability of the electrode.
  • JP-A-11-229170 an electrodeposited nickel layer is provided in which ruthenium oxide is dispersed, and the surface of the layer is coated with a conductive oxide composed of titanium oxide, such that resistance to mercury poisoning is improved.
  • the present disclosure provides an electrode for electrolysis having a low overvoltage and excellent durability.
  • the present disclosure provides a preparation method of an electrode for electrolysis which can prepare an electrode exhibiting the above effects without introducing additional precursors or changing manufacturing facilities.
  • the present disclosure provides an electrode for electrolysis including a metal substrate, and a catalyst layer formed on the metal substrate, wherein the catalyst layer includes nitrogen, a platinum group metal and a rare earth metal, and a nitrogen content of the catalyst layer is 20 to 60 mol% based on the platinum group metal.
  • the catalyst layer caninclude a needle-like structure of the rare earth metal, and the needle-like structure can include at least two needle-shaped structures having a thickness of 50 to 300 nm and a length of 0.5 to 10 ⁇ m.
  • the present disclosure provides a preparation method of an electrode for electrolysis, including the steps of:
  • the platinum group metal precursor is at least one selected from the group consisting of ruthenium chloride hydrate (RuCl 3 • nH 2 O), tetraamine platinum(II) chloride hydrate (Pt(NH 3 ) 4 Cl 2 • H 2 O), rhodium chloride (RhCl 3 ), rhodium nitrate hydrate (Rh(NO 3 ) 3 • nH 2 O), iridium chloride hydrate (IrCl 3 • nH 2 O), and palladium nitrate (Pd(NO 3 ) 2 ).
  • the rare earth metal precursor is at least one selected from the group consisting of cerium(III) nitrate (Ce(NO 3 ) 3 ), cerium(III) carbonate (Ce 2 (CO 3 ) 3 ), cerium(III) chloride (CeCl 3 ), yttrium oxide (Y 2 O 3 ), and yttrium carbonate (Y 2 (CO 3 ) 3 ).
  • the organic solvent can be a mixed solvent comprising a C1 to C6 alcohol and a C4 to C8 glycol ether, and the ratio of the C1 to C6 alcohol to the C4 to C8 glycol ether can be 10:1 to 1:2.
  • the amine-based solvent is at least one selected from the group consisting of octylamine, decylamine, dodecylamine, oleylamine, laurylamine, and hexadecylamine.
  • the amine-based solvent is present in an amount of 3 to 40 vol% based on 100 vol% of the coating solution for preparing an electrode.
  • the platinum group metal precursor and the rare earth metal precursor can be present in a molar ratio of 1:1 to 10:1.
  • a concentration of the coating solution for preparing an electrode can be 50 to 150 g/L.
  • the drying step can be carried out at a temperature of 70 to 200 °C, and the heat-treating step can be carried out at a temperature of 300 to 600 °C.
  • the present disclosure provides an electrode for electrolysis prepared by the method described herein.
  • the electrode for electrolysis according to the present disclosure has an improved needle-like structure of a rare earth metal compared to conventional electrodes, and thus detachment of catalytic materials from the electrode is reduced, so that the electrode is excellent in durability such as exhibiting stable performance even in a reverse current flow. Further, since the electrode for electrolysis of the present disclosure has a low overvoltage value, an overvoltage required amount of the electrolytic cell can be remarkably reduced. In addition, according to the preparation method of the present disclosure, an electrode for electrolysis having the above effects can be prepared without introducing additional precursors or changing manufacturing facilities.
  • any metal substrate having electrical conductivity commonly used in the art can be used without limitation.
  • the type of the metal substrate is not particularly limited.
  • a porous substrate such as a mesh, a nonwoven metal fabric, a metal foam, a porous punching plate, a braided metal, an expanded metal, or the like can be used.
  • the material of the metal substrate can be nickel, a nickel alloy, stainless steel, copper, cobalt, iron, steel, or an alloy thereof. Nickel or a nickel alloy is preferable in terms of electrical conductivity and durability.
  • the platinum group metal refers to a transition metal of Group 8 to Group 10 that is similar in properties to platinum, including ruthenium (Ru), platinum (Pt), rhodium (Rh), iridium (Ir), osmium (Os), and palladium (Pd).
  • the platinum group metal has catalytic activity, and can lower the overvoltage and improve life characteristics by being included in the electrode for electrolysis.
  • the platinum group metal can be ruthenium.
  • the rare earth metal refers to cerium (Ce), yttrium (Y), lanthanum (La), scandium (Sc), or the like. According to one embodiment of the present disclosure, the rare earth metal can be cerium.
  • the present disclosure provides a preparation method of an electrode for electrolysis, including the steps of:
  • the electrode for electrolysis prepared according to the present disclosure significantly improves the overvoltage and exhibits an effect of increasing the needle-like structure of the rare earth metal on the surface of the electrode during cell operation. Accordingly, the electrode has remarkably improved durability, so that stable overvoltage efficiency can be ensured even after a reverse current phenomenon occurs.
  • the coating solution for preparing an electrode contains at least one platinum group metal precursor and at least one rare earth metal precursor.
  • the platinum group metal precursor is at least one selected from the group consisting of ruthenium chloride hydrate (RuCl 3 • nH 2 O), tetraamine platinum(II) chloride hydrate (Pt(NH 3 ) 4 Cl 2 . H 2 O), rhodium chloride (RhCl 3 ), rhodium nitrate hydrate (Rh(NO 3 ) 3 • nH 2 O), iridium chloride hydrate (IrCl 3 • nH 2 O), and palladium nitrate (Pd(NO 3 ) 2 ).
  • the platinum group metal precursor is calcined in the heat-treating step and converted into catalytically active particles, that is, metal or compound particles that are catalytically active for the reduction of water.
  • catalytically active particles that is, metal or compound particles that are catalytically active for the reduction of water.
  • the rare earth metal precursor is at least one selected from the group consisting of cerium(III) nitrate (Ce(NO 3 ) 3 ), cerium(III) carbonate (Ce 2 (CO 3 ) 3 ), cerium(III) chloride (CeCl 3 ), yttrium oxide (Y 2 O 3 ), and yttrium carbonate (Y 2 (CO 3 ) 3 ).
  • the rare earth metal precursor is calcined in the heat-treating step and converted into a rare earth metal oxide.
  • the rare earth metal oxide has insufficient hydrogen-generating activity, but changes from a granular form to a needle-like form under an environment in which hydrogen is generated. This needle-like form supports the catalyst layer of the platinum group compound and has an effect of reducing the detachment of the catalyst layer.
  • the electrode for electrolysis of the present disclosure exhibits excellent durability such as stably maintaining the electrode performance even after a reverse current occurs.
  • the rare earth metal precursor includes at least one cerium (Ce) salt or oxide.
  • Ce cerium nitrate hexahydrate
  • RuCl 3 • nH 2 O ruthenium chloride hydrate
  • a ratio of the platinum group metal precursor and the rare earth metal precursor is not particularly limited, and can be appropriately adjusted depending on the kind of the precursor.
  • the platinum group metal precursor and the rare earth metal precursor can be used in a molar ratio of 1:1 to 10:1, or 3:1 to 10:1 in order to optimize catalytic activity of the finally prepared electrode for electrolysis.
  • the solvent used in the coating solution for preparing an electrode is an organic solvent capable of dissolving the platinum group metal precursor and the rare earth metal precursor, and is preferably a solvent capable of volatilizing at least 95 % in the drying and heat-treating steps.
  • the organic solvent can be an organic polar solvent such as an alcohol-based solvent, a glycol ether-based solvent, an ester-based solvent, or a ketone-based solvent, and any of these can be used alone or in combination.
  • the organic solvent can be an alcohol-based solvent, a glycol ether-based solvent, or a combination thereof.
  • the alcohol-based solvent is preferably a C1 to C6 alcohol, and specifically, at least one selected from the group consisting of methanol, ethanol, propanol, isopropyl alcohol, butanol, ethylene glycol, and propylene glycol, can be used, but the present disclosure is not limited thereto.
  • the glycol ether-based solvent is preferably a C4 to C8 glycol ether, and specifically, at least one selected from the group consisting of 2-ethoxyethanol, 2-propoxyethanol, 2-isopropoxyethanol, 2-butoxyethanol, and 2-(2-methoxyethoxy) ethanol, any of which can be used, but the present disclosure is not limited thereto.
  • the organic solvent can be a mixed solvent of a C1 to C6 alcohol and a C4 to C8 glycol ether.
  • the mixed solvent when used, there is an effect of significantly reducing peeling and cracking of the prepared electrode as compared with an electrode prepared using only a single alcohol-based solvent. Further, since the drying time is prolonged in a large-area coating, more uniform coating can be performed, which is preferable.
  • the ratio of the C1 to C6 alcohol and the C4 to C8 glycol ether is preferably in the range of 10:1 to 1:2, more preferably in the range of 4:1 to 1:1.
  • a 1:1 mixed solvent of isopropyl alcohol and 2-butoxyethanol, or a 1:1 mixed solvent of ethanol and 2-butoxyethanol is used as the organic solvent, but the present disclosure is not limited thereto.
  • the coating solution for preparing an electrode further contains an amine-based solvent as a stabilizer in addition to the organic solvent.
  • the amine-based solvent is included in the coating solution, the finally prepared electrode has the increased needle-like structure of the rare earth metal on the surface during cell operation, thereby improving durability of the electrode and further reducing the overvoltage of the electrode.
  • the amine-based solvent is at least one selected from the group consisting of octylamine, decylamine, dodecylamine, oleylamine, laurylamine, and hexadecylamine can be used.
  • the amine-based solvent can be octylamine, oleylamine, or a combination thereof.
  • the amine-based solvent is present in an amount of 3 to 40 vol%, or 5 to 30 vol%, based on 100 vol% of the coating solution for preparing an electrode. If the amount of the amine-based solvent is less than 3 vol%, the durability-improving effect and the overvoltage-reducing effect of the electrode cannot be achieved. If it exceeds 40 vol%, it is difficult to dissolve the metal precursors, and a coating solution for preparing an electrode in which the precursors are uniformly dispersed cannot be obtained.
  • the preparation method of the coating solution for preparing an electrode is not particularly limited.
  • a method in which a platinum group metal precursor and a rare earth metal precursor are added and dissolved in a mixed solvent obtained by mixing an organic solvent and an amine-based solvent can be used.
  • the coating solution can be prepared by completely dissolving the metal precursors in an organic solvent and then adding an amine-based solvent with mixing.
  • the final concentration of the coating solution for preparing an electrode may be 50 to 150 g/L, or 80 to 120 g/L.
  • concentration is within these ranges, the content of the metal precursors in the coating solution becomes sufficient to ensure the electrode performance and durability, and the coating solution can be coated on the substrate with an appropriate thickness, thereby maximizing the process efficiency.
  • the coating solution for preparing an electrode is applied on a metal substrate to form a catalyst layer, which is then dried and heat-treated to prepare an electrode for electrolysis.
  • the metal substrate can be subjected to a cleaning treatment such as degreasing and blasting, or a surface-roughening treatment before forming the catalyst layer to further improve adhesion to the catalyst layer.
  • the applying, drying, and heat-treating steps of the coating solution can be repeated several times.
  • the method of applying the coating solution for preparing an electrode is not particularly limited, and coating methods known in the art such as spray coating, paint brushing, doctor blade, dip-drawing, spin coating, and the like can be used.
  • the drying step is carried out to remove the solvent contained in the catalyst layer.
  • the drying condition is not particularly limited, and can be appropriately adjusted depending on the type of the solvent and the thickness of the catalyst layer.
  • the drying step can be carried out at a temperature of 70 to 200 °C for 5 to 15 minutes.
  • pyrolysis of the platinum group metal precursor and the rare earth metal precursor in the catalyst layer takes place, thereby converting into a platinum group metal, a compound thereof, and a rare earth metal oxide having catalytic activity.
  • the heat-treating condition can vary depending on the kind of the metal precursors, but specifically, the heat-treating temperature can be 300 to 600 °C or 400 to 550 °C, and the heat-treating can be performed for 10 minutes to 2 hours.
  • the heat-treating step performed after the applying and drying steps is shortened to 5 to 15 minutes, and the final heat-treating step performed after the last drying step can be carried out for a sufficient time of 30 minutes or more, or 1 to 2 hours.
  • the final heat-treating step is performed for a long time, the metal precursors can be completely pyrolyzed, and the interface between the catalyst layers can be minimized, thereby improving the electrode performance.
  • the thickness of the catalyst layer in the electrode for electrolysis prepared by the above method is not particularly limited, but can be in the range of 0.5 to 5 ⁇ m, or 1 to 3 ⁇ m.
  • the electrode for electrolysis prepared according to the preparation method of the present disclosure can be applied to various electrolytic cells for industrial electrolysis, and can be suitably used as a cathode of a chlor-alkali cell.
  • a precursor solution was prepared by dissolving a metal precursor containing RuCl 3 • nH 2 O and Ce(NO 3 ) 2 • 6H 2 O in a molar ratio of 6:1 in a mixed solvent of isopropyl alcohol (IPA) and 2-butoxy ethanol in a volume ratio of 1:1. Subsequently, the precursor solution and an amine-based solvent (oleylamine) were mixed in a volume ratio of 2:1 to prepare a coating solution for preparing an electrode at a concentration of 100 g/L. The coating solution was brush-coated on a nickel mesh, dried at 200 °C for 10 minutes, and heat-treated at 500 °C for 10 minutes. This process was repeated ten times in total, and then it was heat-treated at 500 °C for 1 hour to obtain an electrode for electrolysis.
  • IPA isopropyl alcohol
  • 2-butoxy ethanol 2-butoxy ethanol
  • An electrode for electrolysis was prepared in the same manner as in Example 1, except that octylamine was used instead of oleylamine as an amine-based solvent.
  • a coating solution with a concentration of 100 g/L was prepared by dissolving a metal precursor containing RuCl 3 • nH 2 O and Ce(NO 3 ) 2 • 6H 2 O in a molar ratio of 6:1 in a mixed solvent of isopropyl alcohol (IPA) and 2-butoxy ethanol in a volume ratio of 1:1.
  • the coating solution was brush-coated on a nickel mesh, dried at 200 °C for 10 minutes, and heat-treated at 500 °C for 10 minutes. This process was repeated ten times in total, and then it was heat-treated at 500 °C for 1 hour to obtain an electrode for electrolysis.
  • a precursor solution was prepared by dissolving a metal precursor containing RuCl 3 • nH 2 O and Ce(NO 3 ) 2 • 6H 2 O in a molar ratio of 6:1 in a mixed solvent of isopropyl alcohol (IPA) and 2-butoxy ethanol in a volume ratio of 1:1. Subsequently, oxalic acid was added thereto as an additional additive so that a molar ratio of oxalic acid to ruthenium was 0.5 times, and dissolved to prepare a coating solution with a concentration of 100 g/L. The coating solution was brush-coated on a nickel mesh, dried at 200 °C for 10 minutes, and heat-treated at 500 °C for 10 minutes. This process was repeated ten times in total, and then it was heat-treated at 500 °C for 1 hour to obtain an electrode for electrolysis.
  • IPA isopropyl alcohol
  • a half-cell having the electrode for electrolysis (10 mm ⁇ 10 mm) of the above examples or comparative examples as a cathode was prepared by the following method.
  • the half-cell was prepared using the electrode of the examples or comparative examples as a cathode 32 wt% NaOH aqueous solution as an electrolyte, a Pt wire as a counter electrode, and a saturated calomel electrode (SCE) as a reference electrode.
  • SCE saturated calomel electrode
  • the voltage at a current density of 4.4 kA/m 2 was measured for each electrode for electrolysis by linear sweep voltammetry using the half-cell of the above preparation example.
  • the above experiment was repeated 10 times, and an average value of the measured voltages was determined as an average value of overvoltage improvement.
  • the degree of overvoltage improvement was calculated by comparing with the voltage of the commercial electrode (Asahi Kasei commercial cathode: ncz-2).
  • Example 1 prepared by adding oleylamine as an amine-based solvent has the average degree of overvoltage improvement compared with the commercial electrode of -51 mV, which shows that Example 1 is superior to Comparative Example 1 prepared without addition of the amine-based solvent, and Comparative Example 2 prepared by adding oxalic acid instead of the amine-based solvent.
  • the electrode of Example 2 prepared by adding octylamine as an amine-based solvent exhibited the degree of overvoltage improvement of -55 mV.
  • the half-cell of the above preparation example was subjected to a reverse current test under the following test conditions to evaluate durability against the electrode of Example 1 and the commercial electrode (same as Experimental Example 1). The results are shown in Table 2 and FIG. 1 .
  • the electrode prepared according to the present disclosure has an advantage in durability as compared with the commercial electrode even in reverse current flow.
  • the cell in which the test of Experimental Example 1 was completed was disassembled and the surface states of the electrodes of Examples 1 and 2 and Comparative Example 1 were confirmed by SEM at 1000 times and 10,000 times, respectively ( FIG. 2 ).
  • the thickness and length of the needle-like structure were measured by a length measurement tool of SEM.
  • Examples 1 and 2 in which an amine-based solvent was added to the precursor solution for preparing an electrode had a needle-like structure of cerium clearly observed on the surface of the electrode after cell operation as compared to Comparative Example 1 in which no amine-based solvent was added.
  • each needle-like structure was formed to have a thickness of 50 to 200 nm and a length of 0.5 to 5 ⁇ m, whereas in Comparative Example 1, the thickness was only 20 to 50 nm and the length was 0.2 to 0.5 ⁇ m. That is, it can be confirmed that the needle-like structure of cerium was increased by 2 to 4 times in the electrode to which amine was added.
  • the preparation method of the present disclosure can increase the needle-like structure of the rare earth metal, thereby significantly improving durability of the electrode.
  • Example 1 and 2 using an amine-based solvent in the preparation of the electrode for electrolysis, the molar ratio of nitrogen to ruthenium was as high as 35 to 50 %, whereas in Comparative Example 1 in which amine was not used had a molar ratio of nitrogen to ruthenium of 13 to 19 %.
  • the electrode prepared according to the method of the present disclosure exhibits a higher content of nitrogen, which is an amine component, even after the heat-treatment, than the electrode not containing an amine-based solvent during preparation.

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Claims (6)

  1. Herstellungsverfahren für eine Elektrode für Elektrolyse, umfassend die Schritte:
    Herstellen einer Beschichtungslösung zum Herstellen einer Elektrode, die einen Platingruppenmetallvorläufer, einen Seltenerdmetallvorläufer, ein organisches Lösungsmittel und ein Amin-basiertes Lösungsmittel umfasst;
    Aufbringen der Beschichtungslösung zum Herstellen einer Elektrode auf einen Metallträger, um eine Katalysatorschicht zu bilden;
    Trocknen der Katalysatorschicht; und
    Wärmebehandeln der Katalysatorschicht;
    wobei der Platingruppenmetallvorläufer zumindest einer ist, ausgewählt aus der Gruppe, bestehend aus Rutheniumchloridhydrat (RuCl3 • nH2O), Tetraaminplatin(II)chloridhydrat (Pt(NH3)4Cl2 • H2O), Rhodiumchlorid (RhCl3), Rhodiumnitrathydrat (Rh(NO3)3 • nH2O), Iridiumchloridhydrat (IrCl3 • nH2O) und Palladiumnitrat (Pd(NO3)2);
    der Seltenerdmetallvorläufer zumindest einer ist, ausgewählt aus der Gruppe, bestehend aus Cer(III)nitrat (Ce(NO3)3), Cer(III)carbonat (Ce2(CO3)3), Cer(III ) chlorid (CeCl3), Yttriumoxid (Y2O3) und Yttriumcarbonat (Y2(CO3)3); und das Amin-basierte Lösungsmittel zumindest eines ist, ausgewählt aus der Gruppe, bestehend aus Octylamin, Decylamin, Dodecylamin, Oleylamin, Laurylamin und Hexadecylamin,
    das Amin-basierte Lösungsmittel in einer Menge von 3 bis 40 Vol.-%, bezogen auf 100 Vol.-% der Beschichtungslösung zum Herstellen einer Elektrode, vorhanden ist.
  2. Herstellungsverfahren einer Elektrode für die Elektrolyse nach Anspruch 1, wobei das organische Lösungsmittel ein gemischtes Lösungsmittel von einem C1-C6 Alkohol und einem C4-C8 Glycolether ist.
  3. Herstellungsverfahren einer Elektrode für die Elektrolyse nach Anspruch 2, wobei das Mischverhältnis des C1-C6 Alkohols und des C4-C8 Glycolethers 10:1 bis 1:2 ist.
  4. Herstellungsverfahren einer Elektrode für die Elektrolyse nach Anspruch 1, wobei der Platingruppenmetallvorläufer und der Seltenerdmetallvorläufer in einem molaren Verhältnis von 1:1 bis 10:1 vorhanden sind.
  5. Herstellungsverfahren einer Elektrode für die Elektrolyse nach Anspruch 1, wobei der Schritt des Wärmebehandelns bei einer Temperatur von 300 bis 6oo°C durchgeführt wird.
  6. Elektrode für die Elektrolyse, hergestellt durch das Verfahren nach einem der Ansprüche 1 bis 5.
EP18843984.8A 2017-08-11 2018-07-30 Elektrolytische elektrode und herstellungsverfahren dafür Active EP3492631B1 (de)

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CN109790634B (zh) 2021-02-23
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CN109790634A (zh) 2019-05-21
WO2019031753A1 (ko) 2019-02-14

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