Hydrogenated active cathode and preparation method thereof and electrolytic tank with hydrogenated active cathode

An active cathode and hydrogen evolution technology, applied in the field of electrochemistry, can solve the problems of chlorine damage and low hydrogen evolution potential, and achieve the effects of preventing heavy metal pollution, low hydrogen evolution potential and excellent catalytic activity

Active Publication Date: 2018-03-20
BLUESTAR BEIJING CHEM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of the hydrogen-evolving active cathode of the present invention solves the defect that the chlorine gas decomposed by using chloride as the coating liquid will cause great harm to the human body, and the prepared cathode has good stability, low hydrogen-evolution potential, long service life and corrosion resistance Performance and electrocatalytic activity have been greatly improved

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  • Hydrogenated active cathode and preparation method thereof and electrolytic tank with hydrogenated active cathode
  • Hydrogenated active cathode and preparation method thereof and electrolytic tank with hydrogenated active cathode
  • Hydrogenated active cathode and preparation method thereof and electrolytic tank with hydrogenated active cathode

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preparation example Construction

[0038] The method for preparing the hydrogen evolution active cathode provided by the present invention comprises the following steps:

[0039] (1) Provide a conductive substrate;

[0040] (2) Provide the solution of nitrate metal salt, described nitrate metal salt comprises the mixture of noble metal nitrate and lanthanide metal nitrate, wherein in the mixture, described noble metal nitrate and described lanthanide metal nitrate The molar percentage of salt is 75%: 25%-85%: 15%;

[0041] (3) coating the conductive substrate with the solution of the nitrate metal salt to obtain a coated conductive substrate, without performing an air-fired treatment before the coating; and

[0042] (4) heat treating the coated conductive substrate to obtain an active catalyst coating on the conductive substrate.

[0043] Wherein, the conductive substrate is not particularly limited, and it can be any conductive substrate available in the art, especially a nickel conductive substrate or a nic...

Embodiment 1

[0059] The hydrogen evolution active cathode of this embodiment and its preparation method are as follows:

[0060] ⑴ Pretreatment of nickel substrate

[0061] First use 320-mesh white corundum sand to sandblast the nickel substrate, then prepare a sulfuric acid solution with a mass fraction of 25%, heat it up to 30°C and put it into the nickel substrate, soak and corrode the nickel substrate to reduce the weight of the nickel substrate It reaches 0.6±0.1% of the total weight of the net. After the corrosion is finished, rinse the nickel substrate with clean water to remove the residual acid corrosion solution on the surface.

[0062] ⑵Preparation of nitric acid metal salt solution

[0063] This embodiment contains ruthenium nitrate and cerium nitrate, wherein the concentration of ruthenium nitrate is 100 g / L, and the molar percentage of metal salt is ruthenium:cerium=85%:15%.

[0064] Put the ruthenium nitrate solution on a magnetic stirrer with a heater and stir for 10 minu...

Embodiment 2

[0068] The hydrogen evolution active cathode of this embodiment and its preparation method are as follows:

[0069] ⑴ Pretreatment of nickel substrate

[0070] First use 320-mesh white corundum sand to sandblast the nickel substrate, then prepare a sulfuric acid solution with a mass fraction of 30%, heat up to 50°C and put it into the nickel substrate, soak and corrode the nickel substrate to reduce the weight of the nickel substrate Reach 0.6±0.1% of the total weight of the net. After the corrosion is finished, rinse the nickel substrate with clean water to remove the residual acid corrosion solution on the surface.

[0071] ⑵Preparation of nitric acid metal salt solution

[0072] This embodiment contains ruthenium nitrate and cerium nitrate, wherein the concentration of ruthenium nitrate is 100 g / L, and the molar percentage of metal salt is ruthenium:cerium=85%:15%.

[0073] Put the ruthenium nitrate solution on a magnetic stirrer with a heater and stir for 10 minutes, th...

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Abstract

The invention discloses a hydrogenated active cathode and a preparation method of the hydrogenated active cathode and an electrolytic tank with the hydrogenated active cathode. The hydrogenated activecathode comprises a conductive substrate and an active catalyst layer on the conductive substrate, and the active catalyst layer is directly formed on the surface of conductive substrate after heat treatment of nitric acid series nitrate. By means of the preparation method of the hydrogenated active cathode, the defect that the chlorine gas decomposed out in the process of heat treatment when utilizing a chloride solution as a coating solution has great harm to human body is overcome. The prepared catalyst layer of the hydrogenated active cathode is obtained by heat treatment of the nitric acid series nitrate solution with less corrosivity to a nickel base material in an oxygen atmosphere and the heat treatment of low-high-temperature two-stage burning is preferred, the preparation methodof the hydrogenated active cathode is simple, the prepared cathode is strong in corrosion resistance and is long in service life, low in electrode potential, excellent in catalytic activity and highin uniformity of the catalyst layer, and the electrolytic properties and electrocatalytic activity are both improved greatly.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a hydrogen evolution active cathode, a preparation method thereof, and an electrolytic cell containing the hydrogen evolution active cathode. Background technique [0002] At present, nickel-based hydrogen evolution active cathodes are generally used as hydrogen evolution active cathodes. The research on nickel-based hydrogen evolution active cathodes mainly falls into four categories: nickel-based alloy hydrogen evolution electrodes, porous nickel hydrogen evolution electrodes, nickel-based noble metal oxide hydrogen evolution electrodes, and nickel-based hydrogen evolution electrodes. Hydrogen evolution electrode of dispersion composite system. Because the hydrogen evolution electrode based on nickel-based noble metal oxide has relatively high electrocatalytic activity, selectivity and stability in the process of hydrogen evolution reaction. Therefore, the research on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06
CPCC25B11/051C25B11/093
Inventor 陆崖青刘恒君于昕刘怡吴小静高珊王锐
Owner BLUESTAR BEIJING CHEM MACHINERY
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