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Preparation method of RuO2 material with ordered porous structure

A porous structure and solution technology, applied in the field of ordered porous structure RuO2 materials and their preparation, can solve the problems such as no related literature reports, and achieve the effects of adjustable pore size, good catalytic activity, and high specific surface area.

Inactive Publication Date: 2015-04-22
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Currently using SiO 2 Preparation of Ordered Porous Structure RuO by Hard Template Method 2 The material has not yet been reported in the relevant literature

Method used

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  • Preparation method of RuO2 material with ordered porous structure
  • Preparation method of RuO2 material with ordered porous structure
  • Preparation method of RuO2 material with ordered porous structure

Examples

Experimental program
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Embodiment 1

[0022] 1. Take 5mL SiO2 2 A 10% aqueous solution of nanospheres (65nm) is poured into a petri dish with a diameter of 2 cm, placed in a closed space, and volatilized slowly. After 5 days, densely packed blocks were obtained, which were annealed at 800° C. for 3 hours in air (heating rate 2° C. / minute) to obtain 0.5 g of a hard template. SiO with other diameters in the range of 10-300nm or beyond the range can also be selected 2 nanospheres, but the obtained ordered porous RuO 2 The pore size of the material will also vary.

[0023] 2. Put these hard templates in a 5cm Petri dish, add 0.2mL of RuCl dropwise 3 Ethanol solution (each 5-7mL solution can contain 0.38g Ru element), after the ethanol is completely volatilized, continue to add dropwise; repeat dropwise 5 times. 4 times is also acceptable.

[0024] 3. Anneal at 300°C in air for 1 hour (the best heating rate is 1°C / min); and the last annealing temperature before removing the template can reach 400-600°C, the anneal...

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Abstract

The invention relates to a preparation method of a RuO2 material with an ordered porous structure. A SiO2 nanosphere with the length of 10 to 300 nm is placed in water in a static state for evaporation induced self-assembly to form a block body with an ordered and close packing structure; after annealing with the temperature of 600 to 1000 DEG C in air, a hard template is formed; the hard template is placed in a culture dish and a soluble Ru salt solution is added; annealing is carried out with the temperature of 300 to 600 DEG C in air; gaps in the template are filled with RuO2 and multi-times repeated filling is carried out; and the SiO2 template is removed by an HF or NaOH solution and deionized water is used for cleaning and drying, thereby obtaining an ordered porous RuO2 material.

Description

technical field [0001] The invention relates to the technical field of materials for supercapacitors and lithium-air batteries, in particular to an ordered porous structure RuO 2 Materials and their preparation methods. Background technique [0002] RuO 2 In the field of supercapacitors and lithium-air batteries, it has an important role and excellent performance. RuO 2 When used as an electrode material for a supercapacitor, it has a very high specific capacitance (768F / g), and is currently one of the most ideal electrode materials for a supercapacitor. [0003] As an electrode material for lithium-air batteries, RuO 2 It can exhibit excellent electrocatalytic activity and can effectively reduce the overvoltage of the battery. [0004] If the RuO 2 Made into a porous structure, the specific surface area of ​​the material can be increased, thereby increasing the contact area between the material and the electrolyte. For supercapacitors, a high specific surface area ca...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01M4/48C01G55/00
CPCH01G11/24H01G11/86C01G55/004H01G11/46C01P2004/03C01P2006/16Y02E60/13
Inventor 林子夏郑明波施毅赵斌濮琳
Owner NANJING UNIV
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