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A kind of preparation method of efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst

A ruthenium dioxide-based acid and electrocatalyst technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of inability to meet the requirements of large-scale industrial production, difficulty in fully utilizing ruthenium precursors, and increase in production processes, and achieve excellent results. Stability, good stability and the effect of improving utilization efficiency

Active Publication Date: 2022-02-15
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Problems solved by technology

[0005] Ruthenium dioxide has high oxygen evolution catalytic activity and good stability in alkaline, but has poor stability in acid and cannot meet the requirements of large-scale industrial production
The disadvantage of this method is that the ruthenium precursor is difficult to be fully utilized, and a large amount of alkaline waste liquid is generated during the production process; moreover, the prepared ruthenium dioxide powder needs to be loaded on the current collector through a coating step, which increases the production process. , which increases the cost of production

Method used

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  • A kind of preparation method of efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst
  • A kind of preparation method of efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst
  • A kind of preparation method of efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst

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Embodiment 1

[0029] In this example, the preparation of the acidic oxygen evolution electrocatalyst is as follows:

[0030] (1) Substrate pretreatment

[0031] Cut the carbon cloth base to 1 cm wide and 2 cm long, and place it in absolute ethanol for ultrasonic treatment. Then, the carbon cloth was taken out and put into a polytetrafluoroethylene reactor containing a nitric acid solution with a concentration of about 68% by mass, and the reactor was placed in an oven at 120° C. for 2 hours to keep warm. Afterwards, the resulting carbon cloth was washed with deionized water and dried at 80 °C.

[0032] (2) Ruthenium chloride precursor coating

[0033] Dissolve 1.56g of ruthenium trichloride hydrate and 0.25g of polyvinylpyrrolidone K-30 (PVP-K30) in 10ml of N,N-dimethylformamide (DMF), and obtain evenly mixed ruthenium chloride by magnetic stirring precursor solution. Immerse the carbon cloth treated in step (1) in the ruthenium chloride precursor solution for 1 second, take it out quic...

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Abstract

The invention provides a method for preparing an efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst. In the method, carbon cloth is used as a base, ruthenium trichloride solution is dipped and coated on the carbon cloth, and then heat treatment is performed to oxidize ruthenium trichloride into ruthenium dioxide. The obtained ruthenium dioxide is supported on the carbon cloth in the form of nano-scale particles, has the characteristics of high catalytic activity and stable catalytic effect, and can be used as an anode of an industrial acidic water electrolysis hydrogen production device.

Description

technical field [0001] The invention belongs to the technical field of electrocatalytic oxygen evolution for hydrogen production by electrolysis of water, in particular to a preparation method of an efficient and stable ruthenium dioxide-based acidic oxygen evolution electrocatalyst. Background technique [0002] Hydrogen is an energy carrier with practical application prospects. Due to the advantages of high energy density, no carbon emissions, abundant sources, and renewable advantages of hydrogen, hydrogen production technology has been extensively studied in recent decades. [0003] Hydrogen production by electrolysis of water is a commonly used means of hydrogen production. The electrolytic water reaction is divided into two half-reactions, the cathodic hydrogen evolution reaction and the anode oxygen evolution reaction. The oxygen evolution reaction at the anode involves a four-electron transfer process, so the reaction energy barrier is relatively high, which makes t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/075C25B11/065C25B11/054
CPCC25B1/04C25B11/075C25B11/051Y02E60/36
Inventor 陈亮葛瑞翔苏建伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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