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Composite material of nine cobalt octasulfide and titanium dioxide and its preparation method and application

A technology of titanium dioxide and composite materials, applied in the direction of electrolytic components, electrodes, energy input, etc., can solve the problems of unsuitable electrolytic water catalysts, etc., and achieve the effects of effective active reaction area, excellent hydrogen evolution performance and oxygen evolution performance, and high cycle life

Active Publication Date: 2019-04-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material is not suitable as a catalyst for electrolysis of water

Method used

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  • Composite material of nine cobalt octasulfide and titanium dioxide and its preparation method and application
  • Composite material of nine cobalt octasulfide and titanium dioxide and its preparation method and application
  • Composite material of nine cobalt octasulfide and titanium dioxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 0.6g of cobalt nitrate, 0.6g of urea and 0.15g of ammonium fluoride into a beaker, add 80ml of deionized water respectively, mix well, transfer the solution into a polytetrafluoroethylene autoclave, and put in foamed nickel As a substrate, the autoclave was sealed and hydrothermally reacted at 80° C. for 5 hours. After the reaction, cool to room temperature 25°C and wash with deionized water to obtain Co(OH) 2 CO 3 nanowire template.

[0032] Co(OH) 2 CO 3 The nanowire template was cleaned and placed in an atomic layer deposition instrument, with 0.01mol / L titanium tetrachloride and deionized water as the reaction source, the reaction temperature was 100 ° C, and the atomic layer deposition cycle was 80 weeks; the atomic layer deposition TiO 2 @Co(OH) 2 CO 3 nanowire template;

[0033] Weigh 50ml of 0.05mol / L sodium sulfide aqueous solution and place it in a blue cap bottle. Then put TiO 2 @Co(OH) 2 CO 3 The nanowire template was sealed and hydrotherma...

Embodiment 2

[0035] Weigh 0.9g of cobalt nitrate, 0.9g of urea and 0.225g of ammonium fluoride into a beaker, add 80ml of deionized water respectively, mix well, transfer the solution into a polytetrafluoroethylene autoclave, and put in foamed nickel As a substrate, the autoclave was sealed and hydrothermally reacted at 120° C. for 9 hours. After the reaction, cool to room temperature 25°C and wash with deionized water to obtain Co(OH) 2 CO 3 nanowire template.

[0036] Co(OH) 2 CO 3 The nanowire template was cleaned and placed in an atomic layer deposition instrument, using 0.05mol / L titanium tetrachloride and deionized water as the reaction source, the reaction temperature was 150°C, and the atomic layer deposition cycle was 120 weeks; the atomic layer deposition TiO 2 @Co(OH) 2 CO 3 nanowire template;

[0037] Weigh 50ml of 0.1mol / L sodium sulfide aqueous solution and place it in a blue cap bottle. Then put TiO 2 @Co(OH) 2 CO 3 The nanowire template was sealed and hydrotherm...

Embodiment 3

[0039] Weigh 1.2g of cobalt nitrate, 1.2g of urea and 0.375g of ammonium fluoride into a beaker, add 80ml of deionized water respectively, mix well, transfer the solution into a polytetrafluoroethylene autoclave, and put in foamed nickel As a substrate, the autoclave was sealed and hydrothermally reacted at 150° C. for 12 hours. After the reaction, cool to room temperature 25°C and wash with deionized water to obtain Co(OH) 2 CO 3 nanowire template.

[0040] Co(OH) 2 CO 3 The nanowire template was cleaned and placed in an atomic layer deposition instrument, using 0.15 mol / L titanium tetrachloride and deionized water as the reaction source, the reaction temperature was 200 °C, and the atomic layer deposition cycle was 160 weeks; the atomic layer deposition TiO 2 @Co(OH) 2 CO 3 nanowire template;

[0041] Weigh 50ml of 0.05mol / L sodium sulfide aqueous solution and place it in a blue cap bottle. Then put TiO 2 @Co(OH) 2 CO 3 The nanowire template was sealed and hydrot...

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Abstract

The invention discloses a composite material of Co9S8 and titanium dioxide as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out reaction to produce a Co(OH)2CO3 nanowire through a hydrothermal method; by using the Co(OH)2CO3 nanowire as a carrier, depositing TiO2 through an atomic layer to obtain an atomic layer deposited TiO2@Co(OH)2CO3 nanowire; carrying out vulcanization through sodium sulfide to obtain the composite material of Co9S8 and the titanium dioxide. The composite material comprises a TiO2 hollow tube and a Co9S8 nanosheet compounded on the TiO2 hollow tube. The composite material has extraordinary hydrogen evolution performance and oxygen evolution performance, and also has the characteristics of low overpotential, high cycle life and the like; therefore, the composite material is a high-efficient multifunctional electrolyzed water catalyst, and has wide application prospects in the fields of mobile communication, electric automobiles, solar power generation, aerospace and the like.

Description

technical field [0001] The invention relates to the field of electrocatalyst composite electrode materials, in particular to a composite material of nonacobalt octasulfide and titanium dioxide, a preparation method thereof, and an application as a catalyst for electrolysis of water. Background technique [0002] In today's society, with the rapid growth of the world's population and the vigorous development of industry, the demand for energy consumption is increasing, and the problem of energy crisis has become increasingly prominent. Moreover, the use of traditional fossil energy has also brought serious pollution to the natural environment. In order to realize the sustainable development of human society, the development of new renewable clean energy has become the focus of urgent attention of governments and scientists. [0003] Hydrogen energy, as a new type of clean energy with the greatest potential, has attracted widespread attention. Among the many ways to produce ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/06
CPCC25B1/04C25B11/091Y02E60/36Y02P20/133
Inventor 夏新辉邓盛珏钟宇涂江平王秀丽
Owner ZHEJIANG UNIV
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