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Preparation method of a sheet self-assembled starfish-shaped 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 intrinsic nature of hydrogen evolution Active, increased active sites, strong binding effect

Active Publication Date: 2021-07-13
CHONGQING TECH & BUSINESS UNIV
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  • Abstract
  • Description
  • Claims
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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 a sheet self-assembled starfish-shaped nickel-rich nickel telluride catalyst
  • Preparation method of a sheet self-assembled starfish-shaped nickel-rich nickel telluride catalyst
  • Preparation method of a sheet self-assembled starfish-shaped 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 specifically discloses a method for preparing a sheet-layer self-assembled starfish-shaped nickel-rich nickel telluride catalyst, comprising the following steps: step 1: dissolving potassium hydroxide, tellurium source and reducing agent in a solvent , then add the foamed nickel substrate; step 2: seal the heating reaction in step 1, so that nickel telluride is formed on the foamed nickel substrate, and the heating temperature does not exceed 200 °C; step 3: put the foamed substrate with nickel telluride into Annealing treatment is carried out in an inert atmosphere, and the annealing temperature is not lower than 250° C. to obtain a sheet-layer self-assembled starfish-shaped nickel-rich nickel telluride catalyst. The catalyst prepared by adopting the technical solution of the invention presents a starfish-like nickel-rich structure, which helps to improve the hydrogen evolution performance of electrolyzed water.

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 Patents(China)
IPC IPC(8): B01J27/057C25B1/04C25B11/031C25B11/075C23C22/60
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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