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Rapid and low-energy-consumption preparation method of self-supporting nanostructure electrocatalyst

A nanostructure, electrocatalyst technology, applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of poor electrocatalytic activity and stability, long synthesis cycle, complex process, etc., achieve excellent electrocatalytic performance, shorten synthesis The effect of shortening the cycle and shortening the corrosion time

Active Publication Date: 2021-07-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems of long synthesis cycle, complex process, difficulty in synthesis at room temperature, and poor electrocatalytic activity and stability of existing nanostructured electrocatalytic electrode materials, thereby providing a self-supporting nanostructured electrode material with fast and low energy consumption. Catalyst preparation method

Method used

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  • Rapid and low-energy-consumption preparation method of self-supporting nanostructure electrocatalyst

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specific Embodiment approach 1

[0026] Specific embodiment one: present embodiment a kind of preparation method of self-supporting nanostructure electrocatalyst of fast low energy consumption, it is to carry out according to the following steps:

[0027] 1. Pretreatment of active substances:

[0028] The active substance is mixed with water to obtain a mixed solution, and then the mixed solution is ultrasonically vibrated to obtain an active substance solution;

[0029] The concentration of the mixed solution is 0.005mol / L~0.8mol / L;

[0030] Second, the formation of liquid film:

[0031] Evenly drop the active material solution on the pretreated precursor, so that the active material solution forms a liquid film on the surface of the precursor, and obtain a precursor with a liquid film on the surface;

[0032] 3. Apply an atmosphere to the precursor:

[0033] ①. Place the precursor covered with a liquid film in the hearth of the tube furnace;

[0034] ②. At room temperature, close the intake valve, open ...

specific Embodiment approach 2

[0046] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the pretreated precursor described in step 2 is specifically prepared according to the following steps: the precursor is sequentially used with 0.1mol / L~5mol / L HCl solution, deionized water and absolute ethanol for 0.5min to 5min each time. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0047] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the precursor is a transition metal material. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a rapid and low-energy-consumption preparation method of a self-supporting nano-structure electrocatalyst, and relates to a preparation method of a nano-structure electrocatalyst. The invention aims to solve the problems of long synthesis period, complex process, difficulty in synthesis at room temperature and poor electrocatalytic activity and stability of the existing nano-structure electrocatalytic electrode material. The method comprises the following steps of: 1, pre-treating an active substance; 2, forming a liquid film; and 3, applying atmosphere to the precursor. The method is used for rapidly preparing the self-supporting nano-structure electrocatalyst with low energy consumption.

Description

technical field [0001] The invention relates to a preparation method of a nanostructure electrocatalyst. Background technique [0002] The electrocatalytic production of high-purity hydrogen from water is a necessary condition for the development of hydrogen economy. The electrocatalyst is one of the core components of the entire water splitting device because it can reduce the overpotential caused by polarization and improve the conversion efficiency. Therefore, to overcome the slow kinetics of the hydrogen evolution half reaction (HER) and oxygen evolution half reaction (OER) in electrolysis of water at low overpotential, the design of high activity and high stability electrocatalysts has attracted extensive attention. [0003] Commonly used noble metal electrocatalysts represented by Pt, Ir, and Ru exhibit excellent electrochemical performance, but their scarcity and high price limit the large-scale application of this material system. Therefore, the development of low-...

Claims

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Application Information

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IPC IPC(8): C25B11/073C25B1/04C25B11/03
CPCC25B1/04Y02E60/36
Inventor 郑晓航黄柯柯闫耀天杨雅倩隋解和蔡伟
Owner HARBIN INST OF TECH
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