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A co-doped zn(oh) 2 Nanosheet composite material, preparation method and application thereof

A technology of composite materials and nanosheets, which is applied in the field of Co-doped Zn2 nanosheet composite materials and their preparation, can solve the problems of complex catalyst preparation operations and low yield, and achieve good electrical conductivity, oxygen production catalytic activity and stability, The preparation method is simple and efficient

Active Publication Date: 2021-03-26
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects and deficiencies of the existing catalyst preparation operation complexity, low yield, and provide a kind of layered double metal hydroxide catalytic material Co-doped Zn(OH) 2 Nanosheet composites as catalysts for electrocatalytic oxygen evolution reactions

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  • A co-doped zn(oh) <sub>2</sub> Nanosheet composite material, preparation method and application thereof
  • A co-doped zn(oh) <sub>2</sub> Nanosheet composite material, preparation method and application thereof
  • A co-doped zn(oh) <sub>2</sub> Nanosheet composite material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A Co-doped Zn(OH) 2 Nanosheet Co 0.5 Zn 0.5 (OH) 2 , the preparation method comprises the following steps:

[0048] S1. With Zn(NO 3 ) 2 ·6H 2 O is the source of zinc, and Zn(OH) was grown on the foamed nickel substrate by hydrothermal synthesis. 2 nanosheets, where Zn(NO 3 ) 2 ·6H 2 The mass ratio of O, urea, and urotropine is 0.6:0.6:0.4, the above-mentioned substances are dissolved in 30mL deionized water, the reaction temperature is 140°C, and the reaction time is 6h;

[0049] S2. Add Co(NO 3 ) 2 ·6H 2 O is cobalt source, Zn(NO 3 ) 2 ·6H 2 O is the zinc source, and Co-doped Zn(OH) is obtained by hydrothermal reaction 2 Nanosheets, with cleaned and dried nickel foam as the substrate, Co(NO 3 ) 2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 O as cobalt source and zinc source, Co(NO 3 ) 2 ·6H 2 O 0.3g and the corresponding Zn(NO 3 ) 2 ·6H 2 00.3g, keeping its total content is 0.6g, other substance content is constant in the reactor, the quality of urea is ...

Embodiment 2

[0053] A Co-doped Zn(OH) 2 Nanosheet Co 0.33 Zn 0.67 (OH) 2 , the preparation method comprises the following steps:

[0054] S1. With Zn(NO 3 ) 2 ·6H 2 O is the source of zinc, and Zn(OH) was grown on the foamed nickel substrate by hydrothermal synthesis. 2 nanosheets, where Zn(NO 3 ) 2 ·6H 2 The mass ratio of O, urea, and urotropine is 0.6:0.6:0.4, the above-mentioned substances are dissolved in 30mL deionized water, the reaction temperature is 140°C, and the reaction time is 6h;

[0055] S2. Add Co(NO 3 ) 2 ·6H 2 O is cobalt source, Zn(NO 3 ) 2 ·6H 2 O is the zinc source, and Co-doped Zn(OH) is obtained by hydrothermal reaction 2 Nanosheets, with cleaned and dried nickel foam as the substrate, Co(NO 3) 2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 O as cobalt source and zinc source, Co(NO 3 ) 2 ·6H 2 O 0.2g and the corresponding Zn(NO 3 ) 2 ·6H 2 0.4g, keeping its total content is 0.6g, other substance content is constant in the reactor, the quality of urea is ...

Embodiment 3

[0058] A Co-doped Zn(OH) 2 Nanosheet Co 0.67 Zn 0.33 (OH) 2 , the preparation method comprises the following steps:

[0059] S1. With Zn(NO 3 ) 2 ·6H 2 O is the source of zinc, and Zn(OH) was grown on the foamed nickel substrate by hydrothermal synthesis. 2 nanosheets, where Zn(NO 3 ) 2 ·6H 2 The mass ratio of O, urea, and urotropine is 0.6:0.6:0.4, the above-mentioned substances are dissolved in 30mL deionized water, the reaction temperature is 140°C, and the reaction time is 6h;

[0060] S2. Add Co(NO 3 ) 2 ·6H 2 O is cobalt source, Zn(NO 3 ) 2 ·6H 2 O is the zinc source, and Co-doped Zn(OH) is obtained by hydrothermal reaction 2 Nanosheets, with cleaned and dried nickel foam as the substrate, Co(NO 3 ) 2 ·6H 2 O and Zn(NO 3 ) 2 ·6H 2 O as cobalt source and zinc source, Co(NO 3 ) 2 ·6H 2 O 0.4g and the corresponding Zn(NO 3 ) 2 ·6H 2 0.2g, keeping its total content is 0.6g, other substance content is constant in the reactor, the quality of urea is...

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Abstract

The invention discloses a Co-doped Zn(OH) 2 Nanosheet composite material and its preparation method and application. The Co-doped Zn(OH) 2 The nanosheet composite has a three-layer structure, including a nickel foam base layer, Zn(OH) 2 Nanosheets, Co-doped Zn(OH) 2 nanosheets, wherein the Co doped with Zn(OH) 2 The nanosheets are two-dimensional layered double metal hydroxides with the chemical formula Co x Zn 1‑x (OH) 2 , where the value range of X is 0.33~0.67. Composite material with Zn(OH) 2 Nanosheets and Co-doped Zn(OH) 2 The double catalytic layer of the nanosheet layer has good electrical conductivity and oxygen generation catalytic activity and stability. The preparation method uses nickel foam as the substrate, and a two-dimensional layered double hydroxide Co-doped is prepared by a hydrothermal method in one step. Zn(OH) 2 The nanosheet has a simple and efficient preparation method, and is easy to obtain in large quantities. The composite material can be widely used in electrocatalytic water splitting oxygen production catalyst materials.

Description

technical field [0001] The invention relates to the technical field of nanometer electrocatalytic materials, more specifically, to a Co-doped Zn(OH) 2 Nanosheet composite material and its preparation method and application. Background technique [0002] Electrocatalytic water splitting is widely regarded as a unique and promising technology for efficient energy production, storage, and use including sustainable hydrogen production, rechargeable metal-air batteries, and fuel cells. The whole water splitting process consists of two half-reaction processes: the hydrogen evolution reaction at the cathode and the oxygen evolution reaction at the anode. However, compared with the hydrogen evolution reaction, the water oxidation process (oxygen evolution reaction) has a high barrier due to the extremely high overpotential and complex reaction mechanism involved in the four-electron transfer process. Current standard catalysts for high performance oxygen evolution reactions includ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78H01M4/88H01M4/90C25B11/091C25B1/04
CPCH01M4/8825H01M4/9016H01M4/9075C25B1/04B01J23/002B01J23/78B01J2523/00C25B11/093B01J35/33B01J2523/27B01J2523/845B01J2523/847Y02E60/36Y02E60/50
Inventor 张璋胡先标程鹏飞周青伟苏绍强王新
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV