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ZnO-NiO/rGO composite material with efficient electrocatalytic oxygen reduction performance

A composite material, zno-nio technology, applied in circuits, electrical components, battery electrodes, etc., can solve the problem that potential materials have not been developed and reported, and achieve the effects of easy control of reaction parameters, cost reduction, and low energy consumption

Inactive Publication Date: 2017-05-10
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at this stage, there is still a lot of room for research on alternative materials for Pt / C catalysts. Many materials with low prices and great potential, especially the research on transition metal oxide catalytic materials, are still in the preliminary stage. Many materials with potential Not yet developed reports

Method used

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  • ZnO-NiO/rGO composite material with efficient electrocatalytic oxygen reduction performance
  • ZnO-NiO/rGO composite material with efficient electrocatalytic oxygen reduction performance
  • ZnO-NiO/rGO composite material with efficient electrocatalytic oxygen reduction performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In a small 100 mL beaker, while stirring with a magnetic stirrer, add 40 mL of deionized water, and slowly add Zn(NO 3 ) 2 ·6H 2 O 1.48 g (0.005 mol), Ni(NO 3 ) 2 ·6H 2 O 1.46 g (0.005 mol), NaOH 1.60 g (0.04 mol), stirred for 5 min to form a light blue uniform liquid, add ethanol 10 mL, ethylene glycol 5 mL and 6 g / L graphene oxide 4 mL to fully stir the solution (about 10 min), transfer the reaction solution into a 100 ml autoclave, heat to 190 ºC, take it out after 24 hours at a constant temperature, wash the product three times with absolute ethanol, then wash three times with double distilled water, and put it in a vacuum Distilled under reduced pressure at 50 ºC for 20 min in a distillation device to obtain a black powdery solid, which is a ZnO-NiO / rGO composite material with high-efficiency electrocatalytic oxygen reduction performance. It has been detected that the mass ratio of ZnO-NiO to rGO in the ZnO-NiO / rGO composite is about 100:3, and the molar ratio...

Embodiment 2

[0050] In a small 100 mL beaker, while stirring with a magnetic stirrer, add 40 mL of deionized water, and slowly add 1.48 g (0.005 mol) of Zn(NO 3 ) 2 ·6H 2 O , 1.46g (0.005mol) Ni(NO 3 ) 2 ·6H 2 O and 1.60 g (0.04mol) NaOH, stirred for 5 min to form a light blue homogeneous liquid, add 10 mL of ethanol, 5 mL of ethylene glycol and 6 mL of 6 g / L graphene oxide and stir the solution fully (about 10 min) , transfer the reaction solution into a 100 ml autoclave, heat to 190 ºC, take it out after 24 hours at a constant temperature, wash the product three times with absolute ethanol, then wash three times with double distilled water, put it in a vacuum distillation device at 50 ºC Distilled under reduced pressure for 20 min, a black powdery solid was obtained, which is the ZnO-NiO / rGO composite material with high-efficiency electrocatalytic oxygen reduction performance. It has been detected that the mass ratio of ZnO-NiO to rGO in the ZnO-NiO / rGO composite is about 100:5, and...

Embodiment 3

[0053] In a small 100 mL beaker, while stirring with a magnetic stirrer, add 40 mL of deionized water, and slowly add 1.48 g (0.005 mol) of Zn(NO 3 ) 2 ·6H 2 O, 1.46g (0.005mol) Ni(NO 3 ) 2 ·6H 2 O and 1.60 g (0.04mol) NaOH, stirred for 5 min to form a light blue homogeneous liquid, added 10 mL of ethanol, 5 mL of ethylene glycol and 5 mL of 6 g / L graphene oxide, and stirred the solution thoroughly (about 10 min ), transfer the reaction solution into a 100 ml autoclave, heat to 190°C, take it out after 24 hours at a constant temperature, wash the product three times with absolute ethanol, then wash three times with twice distilled water, and put it in a vacuum distillation device at 50°C Distilled under reduced pressure for 20 min to obtain a black powdery solid, which is the ZnO-NiO / rGO composite material with high-efficiency electrocatalytic oxygen reduction performance. It has been detected that the mass ratio of ZnO-NiO to rGO in the ZnO-NiO / rGO composite is about 100...

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Abstract

The invention relates to a ZnO-NiO / rGO composite material with efficient electrocatalytic oxygen reduction performance, and belongs to the technical field of electrocatalytic materials. In the ZnO-NiO / rGO composite material disclosed by the invention, nano ZnO-NiO particles are adhered into a reduction-oxidation graphene slice layer, and the mass ratio of nano ZnO-NiO to rGO is 100: (3 to 5); the sizes of the nano ZnO-NiO particles are 5 to 10 nm, and the reduction-oxidation graphene slice layer is a single slice layer; and the ZnO-NiO / rGO composite material has electrocatalytic oxygen reduction performance. Compared with the cost of an existing oxygen reduction reaction catalyst, the cost of the ZnO-NiO / rGO composite material disclosed by the invention is obviously reduced; and the ZnO-NiO / rGO composite material is an oxygen reduction reaction catalyst with low cost and excellent electrocatalytic oxygen reduction performance. The ZnO-NiO / rGO composite material disclosed by the invention is synthesized with a hydrothermal one-pot process by using a zinc salt, a nickel salt, a hydroxide and oxidized graphene as raw materials, using deionized water and absolute ethyl alcohol as solvents and using ethylene glycol as a dispersing agent and a reducing agent. The raw materials are low in price and easy to obtain, the preparation operation is simple and practicable, the post-treatment process is simple, the parameters of reaction are easy to control, the flow path is short, and the energy consumption is low.

Description

technical field [0001] The invention relates to a ZnO-NiO / rGO composite material with high-efficiency electrocatalytic oxygen reduction performance, belonging to the technical field of electrocatalytic materials. Background technique [0002] At present, the reserves of traditional fossil fuels, such as oil, natural gas, and coal, are decreasing day by day. At the same time, the demand for energy is increasing day by day due to the continuous development of social economy, and the air pollution caused by traditional energy is becoming more and more serious. Therefore, it is necessary to seek clean and efficient energy to replace Traditional energy sources are urgently needed. [0003] The concept of fuel cells was first proposed in 1839. After hundreds of years of development and evolution, fuel cells have become unstoppable in scientific research and commercial applications in recent years. The structure of a fuel cell is similar to that of an ordinary battery, with positi...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9016H01M4/9083Y02E60/50
Inventor 于洁玫刘宗明黄太仲姜润田
Owner UNIV OF JINAN
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