Co-doped Zn(OH)2 nanosheet composite material as well as 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 its preparation, can solve the problems of low output and complex catalyst preparation operations, and achieve simple and efficient preparation methods, good electrical conductivity and oxygen-producing catalysis Effects of Activity and Stability

Active Publication Date: 2018-11-23
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Co-doped Zn(OH)2 nanosheet composite material as well as preparation method and application thereof
  • Co-doped Zn(OH)2 nanosheet composite material as well as preparation method and application thereof
  • Co-doped Zn(OH)2 nanosheet composite material as well as preparation method and application thereof

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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 as well as a preparation method and application thereof. The Co-doped Zn(OH)2 nanosheet composite material has a three-layer structure which comprises a foam nickel basal layer, a Zn(OH)2 nanosheet layer and a Co-doped Zn(OH)2 nanosheet layer, wherein a Co-doped Zn(OH)2 nanosheet is a two-dimensional layered double hydroxide (LDH), the chemical formula is CoxZn[1-x](OH)2, wherein the value range of X is 0.33-0.67. The composite material has double catalytic layers of the Zn(OH)2 nanosheet layer and the Co-doped Zn(OH)2 nanosheet layer as well as good conductivity, oxygen-generating catalytic activity and stability, according to the preparation method, foam nickel is taken as a substrate, a two-dimensional LDH Co-dopedZn(OH)2 nanosheet is prepared in a step through a hydrothermal method, the preparation method is simple and efficient, and the composite material is large in quantity and easy to obtain and can be widely applied to electrocatalytic decomposition of aquatic oxygen 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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IPC IPC(8): B01J23/78H01M4/88H01M4/90C25B11/06C25B1/04
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
OwnerINT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV