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Preparation method of sponge copper-based composite nanorod catalytic layer material

A technology of sponge copper and nanorods is applied in the field of preparation of sponge copper-based composite nanorod catalyst layer materials, which can solve the problems of industrial water electrolysis technology that cannot meet the requirements of high efficiency and economy, hinder the mass transfer steps of the oxygen evolution process of electrolyzed water, oxygen Difficulty in the bubble desorption process, etc., to achieve excellent catalytic performance of electrolyzed water for oxygen evolution, significant gas repellency performance, and the effect of improving the kinetic rate of the reaction

Active Publication Date: 2021-02-02
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the oxygen evolution reaction involves the transfer of four electrons in the process of electrolysis of water, the activation energy of the reaction is high and the electrochemical step rate is slow; in addition, the oxygen bubbles produced by the oxygen evolution reaction have strong adhesion to the electrode, and the oxygen bubbles in the anode The desorption process of the electrode is relatively difficult, which hinders the liquid-phase mass transfer of the reactants to the electrode surface, resulting in a slow overall reaction of electrolyzed water, and it is difficult to carry out the reaction efficiently, which has also become a problem hindering the development of electrolyzed water technology.
So far, the oxygen evolution catalytic materials for electrolysis of water have been developed mainly from the perspective of reducing the activation energy of the electrochemical step in the process of electrolysis of water to increase the rate of the electrochemical step; however, the difficulty of desorption of oxygen bubbles on the electrode hinders the oxygen evolution of electrolysis of water The problem of the mass transfer step of the process is still not effectively solved, and the existing oxygen evolution catalytic materials cannot meet the requirements of efficient and economical industrial water electrolysis technology

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  • Preparation method of sponge copper-based composite nanorod catalytic layer material
  • Preparation method of sponge copper-based composite nanorod catalytic layer material
  • Preparation method of sponge copper-based composite nanorod catalytic layer material

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preparation example Construction

[0022] refer to figure 1 , the invention provides a method for preparing a sponge copper-based loaded composite nanorod catalyst layer material, comprising the following steps:

[0023] Step [1] Sponge copper-based Cu(OH) 2 layer and the construction of amorphous CuO nano-islands, specifically including the following operations:

[0024] a1. Sponge copper-based Cu(OH) 2 Layer formation: pass ammonia gas into deionized water to form ammonia water with a molar concentration of 2-5mol / L, then add urea imide and ammonium bicarbonate to ammonia water to form urea imide with a concentration of 20-45g / L and hydrogen carbonate Composite alkalization solution with an ammonium concentration of 95-140g / L; soak the sponge copper in the composite alkalization solution for 1-3 hours at room temperature, then wash it twice with deionized water to complete Cu(OH) on the surface of the sponge copper substrate. 2 layer formation to obtain spongy Cu-based Cu(OH) 2 Floor;

[0025] a2. Sponge...

Embodiment 1

[0033] Preferred embodiment 1 of the present invention provides a method for preparing a sponge copper-based loaded composite nanorod catalytic layer material, comprising the following steps:

[0034] Step [1] Sponge copper-based Cu(OH) 2 layer and the construction of amorphous CuO nano-islands, specifically including the following operations:

[0035] a1. Sponge copper-based Cu(OH) 2 Formation of layer: pass ammonia gas into deionized water to form ammonia water with molar concentration of 3mol / L, then add urea imide and ammonium bicarbonate to ammonia water to form urea imide concentration of 25g / L and ammonium bicarbonate concentration of 110g / L composite alkalization solution; soak the sponge copper in the composite alkalization solution for 2 hours at room temperature, then wash it twice with deionized water to complete the Cu(OH) on the surface of the sponge copper substrate. 2 layer formation to obtain spongy Cu-based Cu(OH) 2 Floor;

[0036] a2. Sponge copper-base...

Embodiment 2

[0057] Preferred embodiment 2 of the present invention provides a method for preparing a sponge copper-based composite nanorod catalyst layer material, comprising the following steps:

[0058] Step [1] Sponge copper-based Cu(OH) 2 layer and the construction of amorphous CuO nano-islands, specifically including the following operations:

[0059] a1. Sponge copper-based Cu(OH) 2 Layer formation: Ammonia gas is passed into deionized water to form ammonia water with a molar concentration of 4mol / L, and then urea imide and ammonium bicarbonate are added to the ammonia water to form urea imide concentration of 32g / L and ammonium bicarbonate concentration of 120g / L composite alkalization solution; soak the sponge copper in the composite alkalization solution for 3 hours at room temperature, then wash it twice with deionized water to complete Cu(OH) on the surface of the sponge copper substrate. 2 layer formation to obtain spongy Cu-based Cu(OH) 2 Floor;

[0060] a2. Sponge coppe...

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Abstract

The invention provides a method for preparing a sponge copper-based loaded composite nanorod catalytic layer material, comprising the following steps: step [1] sponge copper-based Cu(OH) 2 layer and the construction of amorphous CuO nano-islands; step [2] the sponge copper substrate supports Eu with nanorod structure 2 CuO 4 surface layer; step [3] synthesized Eu with composite nanorods 2 CuO 4 @EuCu(EDCI) 2 (BCS) 4 Structure of Eu 2 CuO 4 catalytic layer. The catalytic material prepared by the method has excellent electrolytic water oxygen evolution catalytic performance, and can meet the requirements of high-efficiency and economical industrial electrolytic water technology.

Description

technical field [0001] The invention relates to the field of electrolytic water electrode catalytic materials, in particular to a method for preparing a sponge copper-based loaded composite nanorod catalytic layer material. Background technique [0002] Water electrolysis technology is an effective way to produce hydrogen on a large scale. The cathodic and anodic reactions of electrolyzed water are hydrogen evolution reaction and oxygen evolution reaction, respectively. The electrode reaction process often involves the liquid-phase mass transfer step of the reactant from the solution to the electrode / interface, the electrochemical step of the reactant gaining and losing electrons at the electrode to form the product, the desorption step of the product at the electrode, and the liquid phase of the product leaving the electrode to the solution. Phase mass transfer step. Since the oxygen evolution reaction involves the transfer of four electrons in the process of electrolysis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J23/83B01J35/10C25B1/04C25B11/095
CPCB01J31/2217B01J31/1691B01J23/83C25B1/04C25B11/04B01J2531/16B01J2531/38B01J35/33B01J35/61Y02E60/36
Inventor 赵明胡广宇李建国
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY