Preparation method of laminar self-assembly starfish type nickel-rich nickel telluride catalyst

A self-assembly, nickel telluride technology, applied in physical/chemical process catalysts, chemical instruments and methods, electrolytic components, etc., can solve the problems of poor hydrogen evolution catalytic activity, catalytic layer shedding, activity decline, etc., to increase the active specific surface area. , Improve roughness and strong bonding effect

Active Publication Date: 2019-10-25
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Transition metal nickel foam (NF) is a common electrode substrate, but the hydrogen evolution catalytic activity of the substrate material is poor, and it is usually necessary to support a catalyst with high catalytic activity
Since bubbles are continuously precipitated during the hydrogen evolution reaction, if the binding force between the catalyst and the substrate is not strong, the catalytic layer is easily washed away by the precipitated gas and falls off, which eventually leads to a decrease in activity or even deactivation

Method used

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  • Preparation method of laminar self-assembly starfish type nickel-rich nickel telluride catalyst
  • Preparation method of laminar self-assembly starfish type nickel-rich nickel telluride catalyst
  • Preparation method of laminar self-assembly starfish type nickel-rich nickel telluride catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～2

[0043] Now carry out test detection to embodiment 1~5 and comparative example 1~2:

[0044] 1. SEM detection:

[0045] Scanning electron microscopy is used to detect the sheet-layer self-assembled starfish-shaped nickel-rich nickel telluride catalysts prepared in Examples 1 to 5. Taking Example 1 as an example, the test results are as follows figure 1 shown.

[0046] From figure 1 It can be observed that the surface of the nickel foam substrate forms a uniform sheet self-assembled starfish-like structure of nickel telluride, and this structure helps to increase the specific surface area of ​​the catalyst, increase the number of active sites, and open vertical sheet structure It can also promote the transmission of the electrolyte and the timely diffusion of the gas products generated during the hydrogen evolution reaction, so that the catalyst has better hydrogen evolution performance.

[0047] 2. XRD detection

[0048] Use X-ray diffractometer to detect the foamed nickel ...

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Abstract

The invention relates to the technical field of electrolytic hydrogen production, and particularly discloses a preparation method of a laminar self-assembly starfish type nickel-rich nickel telluridecatalyst. The preparation method of the laminar self-assembly starfish type nickel-rich nickel telluride catalyst comprises the following steps that step one, potassium hydroxide, a tellurium source and a reducing agent are dissolved in a solvent, and a foamed nickel substrate is added; step two, sealing and heating reaction is carried out on the step one, so that nickel telluride is generated onthe foamed nickel substrate, and the heated temperature does not exceed 200 DEG C; and step three, the generated foamed nickel substrate is placed into an inert atmosphere for annealing treatment, theannealing temperature is not lower than 250 DEG C, and the laminar self-assembly starfish type nickel-rich nickel telluride catalyst is obtained. The catalyst obtained by adopting the technical scheme presents a starfish type nickel-rich nickel structure, and the electrolysed water hydrogen evolution performance is conductive to be improved.

Description

technical field [0001] The invention relates to the technical field of electrolytic hydrogen production, in particular to a method for preparing a sheet-layer self-assembled starfish-shaped nickel-rich nickel telluride catalyst. Background technique [0002] Hydrogen production by electrolysis of water, using non-storable renewable resources (solar energy, wind energy, tidal energy, etc.) It ensures the sustainable use of resources and is of great significance to solving energy and environmental problems. Therefore, constructing a suitable catalyst is the technical core to reduce the energy consumption of hydrogen production by electrolysis of water and improve the efficiency of electrolysis. The role of the catalyst is to accelerate the charge transfer process at the electrode-electrolyte two-phase interface. [0003] Transition metal nickel foam (NF) is a common electrode substrate, but the hydrogen evolution catalytic activity of the substrate material is poor, and it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C25B1/04C25B11/03C25B11/06C23C22/60
CPCB01J27/0576B01J35/0033C23C22/60C25B1/04C25B11/031C25B11/075Y02E60/36
Inventor 熊昆龙川黄丽萍张海东陈佳
Owner CHONGQING TECH & BUSINESS UNIV
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