Preparation method of network-structure zinc nickel double-metal hydroxide double-function electrocatalyst

A technology of hydroxide and network structure, which is applied in the field of electrolysis of water, can solve the problems of severe Ni-LDH morphology stacking, uneven distribution of composite product morphology, and large influence of reaction product morphology, achieving excellent electrochemical performance, Simple synthetic route, enhanced electrochemical performance

Active Publication Date: 2019-01-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent 104445364A discloses a synthesis method of ZnAl-layered double metal hydroxide, which is prepared by co-precipitation method using organic complex solution. The raw materials are expensive, the steps are cumbersome, the organic matter has a great influence on the morphology of the reaction product, and the operation is complicated. Technically difficult
Nickel-basedlayered double hydroxide from guest vanadium oxide anions.HW Park et al. prepared (Zn)Ni-LDH / N-rGO by hydrothermal method, and the morphology distribution of the composite product was uneven, and the preparation process was complicated. (Zn)Ni -LDH morphology stacked seriously
Evaluation of layered zinc hydroxide nitrate and zinc / nickeldouble hydroxide salts in the removal of chromate ions from solutions. The zinc-nickel double metal hydroxide studied by Henrique Bortolaz de Oliveira et al. was synthesized by coprecipitation. The interlayer anion is NO 3 - 、CH 3 COO - The synthesis steps of ZnNi-LDH are complex and difficult to operate

Method used

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  • Preparation method of network-structure zinc nickel double-metal hydroxide double-function electrocatalyst
  • Preparation method of network-structure zinc nickel double-metal hydroxide double-function electrocatalyst
  • Preparation method of network-structure zinc nickel double-metal hydroxide double-function electrocatalyst

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Immerse the nickel foam in pure acetone solution for ultrasonic cleaning for 10 minutes, then immerse the nickel foam in 2mol / L hydrochloric acid for ultrasonic cleaning for 10 minutes, and finally wash it with ethanol and deionized water alternately for 3 times, and vacuum at 25 °C After drying for 10h, obtain the foamed nickel after processing;

[0028] (2) Weigh NiSO 4 ·7H 2 O, Zn(CH3COO)2·2H 2 O, C 9 h 7 NO and Co(NH 2 ) 2 At the same time, it was added to the ethylene glycol solution to dissolve for 5 minutes, and then a certain volume of deionized water was added. The volume ratio of ethylene glycol solution and deionized water was kept at 4:1 and the total volume of the solution was kept at 60mL. Simultaneous control of NiSO 4 ·7H 2 O, Zn(CH3COO)2·2H 2 O, C 9 h 7 NO and Co(NH 2 ) 2 The molar ratio is 1:0.5:3:10, at this moment the concentration of nickel source is 0.0025mol / L, the concentration of zinc source is 0.0125mol / L, C 9 h 7 The concen...

Embodiment 2

[0032](1) Immerse the nickel foam in pure acetone solution for ultrasonic cleaning for 5 minutes, then immerse the nickel foam in 3mol / L hydrochloric acid for ultrasonic cleaning for 15 minutes, and finally wash it with ethanol and deionized water alternately for 4 times, and vacuum at 25 °C After drying for 12h, obtain the foamed nickel after processing;

[0033] (2) Weigh NiSO 4 ·7H 2 O, Zn(CH3COO)2·2H 2 O, C 9 h 7 NO and Co(NH 2 ) 2 At the same time, it was added to the ethylene glycol solution to dissolve for 10 minutes, and then a certain volume of deionized water was added. The volume ratio of ethylene glycol solution and deionized water was kept at 2:1 and the total volume of the solution was kept at 60mL. Simultaneous control of NiSO 4 ·7H 2 O, Zn(CH3COO)2·2H 2 O, C 9 h 7 NO and Co(NH 2 ) 2 The molar ratio is 2:1:6:15, at this moment the concentration of nickel source is 0.005mol / L, the concentration of zinc source is 0.0025mol / L, C 9 h 7 The concentrat...

Embodiment 3

[0037] (1) Sonically clean the nickel foam in pure acetone solution for 10 minutes, then immerse the nickel foam in 3mol / L hydrochloric acid for 15 minutes, and finally wash it with ethanol and deionized water alternately for 4 times, vacuum at 25°C After drying for 12h, obtain the foamed nickel after processing;

[0038] 2) Weigh NiSO 4 ·7H 2 O, Zn(CH3COO)2·2H 2 O, C 9 h 7 NO and Co(NH 2 ) 2 At the same time, it was added to the ethylene glycol solution to dissolve for 15 minutes, and then a certain volume of deionized water was added. The volume ratio of ethylene glycol solution and deionized water was kept at 4:3 and the total volume of the solution was kept at 60mL. Simultaneously control NiCl 2 ·6H 2 O:Zn(CH3COO)2:Co(NH 2 ) 2 The molar ratio is 3:1.5:9:20, the concentration of nickel source is 0.0075mol / L at this moment, the concentration of zinc source is 0.00375mol / L, C 9 h 7 The concentration of NO was 0.0225 mol / L, the concentration of urea was 0.005 mol / ...

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Abstract

The invention discloses a preparation method of a network-structure zinc nickel double-metal hydroxide double-function electrocatalyst. The final product is directly synthesized through a one-step hydrothermal reaction; the network-structure zinc nickel double-metal hydroxide prepared by the method grows on a foam nickel substrate to form a network structure, the nano-sheet thickness is about 10 to 20 nm, the 3D network structure is very good for ions to come in and go out freely, the activity of the nickel-based material in alkali liquid is effectively improved, complete contact of electrolyte and a catalytic material is benefited, and the electrochemical property can be greatly enhanced, so that hydrogen evolution and oxygen evolution properties of water electrolysis are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of electrolysis of water, and relates to a bifunctional electrocatalyst, in particular to a preparation method of a network structure zinc-nickel double metal hydroxide bifunctional electrocatalyst. Background technique [0002] Due to the rapid economic development, human consumption of fossil energy is increasing rapidly. At the same time, the use of fossil energy has brought about a series of environmental problems. Therefore, it is particularly urgent to seek clean energy. The use of solar energy to electrolyze water to produce hydrogen is considered to be the most promising and sustainable way to produce hydrogen, but the current relatively expensive cost of electrolyzing water limits the development of electrolysis hydrogen production technology. The best catalysts for electrolysis of water are Pt, Ir, and Ru. Since they are all noble metals, their production costs are high and they are not conducive t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/091Y02E60/36
Inventor 黄剑锋巩颖波冯亮亮曹丽云刘倩倩王琳琳王潇冯李
Owner SHAANXI UNIV OF SCI & TECH
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