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Method for preventing intermetallic compounds from agglomeration and growth at high temperature and application

An intermetallic compound and high temperature technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of nanomaterial agglomeration and growth without universal applicability, complex process, etc., to prevent easy agglomeration and growth, and inhibit particle agglomeration , the effect of simple method

Active Publication Date: 2019-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Most of the above methods are complicated in process, and the methods adopted for different intermetallic compounds are different, and they are not universal in inhibiting the agglomeration and growth of nanomaterials

Method used

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  • Method for preventing intermetallic compounds from agglomeration and growth at high temperature and application
  • Method for preventing intermetallic compounds from agglomeration and growth at high temperature and application
  • Method for preventing intermetallic compounds from agglomeration and growth at high temperature and application

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Make GO plus deionized water to make a 10 mg / ml solution, add H in sequence 2 PtCl 6 , FeCl 3 and PVA so that H 2 PtCl 6 The concentration is 12 mmol / L, FeCl 3 The concentration of 4 mmol / L and the concentration of PVA 20 mg / mL, ultrasonically mixed, then freeze-dried, first at -40 o C for 6 h, and then vacuum-dried for 24 h. The resulting product was heated at 8% H 2 / High temperature quenching treatment in Ar environment, calcination temperature 600 o C, time 6h. The product is filtered, washed and then dried to obtain the fuel cell electrode active material Pt 3 Fe / C.

Embodiment 2

[0035] Make GO plus deionized water to make a 10 mg / ml solution, add H in sequence 2 PtCl 6 , CoCl 2 and PVA so that H 2 PtCl 6 The concentration is 12 mmol / L, CoCl 2 The concentration of 4 mmol / L and the concentration of PVA is 20 mg / mL, ultrasonically mixed, then freeze-dried, at -40 o C for 6 h, and vacuum-dried for 24 h. The resulting product was heated at 8% H 2 / High temperature quenching treatment in Ar environment, calcination temperature 700 o C, time 6h. The product is filtered, washed and then dried to obtain the fuel cell electrode active material Pt 3 Co / C.

Embodiment 3

[0037] Add XC-72 and deionized water to make a 10 mg / ml solution, add H in sequence 2 PtCl 6 , MnCl 2 and PVA so that H 2 PtCl 6 The concentration is 12 mmol / L, MnCl 2 The concentration of 4 mmol / L and the concentration of PVA is 20 mg / mL, ultrasonically mixed, then freeze-dried, at -40 o C for 6 h, and vacuum-dried for 24 h. The resulting product was heated at 8% H 2 / High temperature quenching treatment in Ar environment, calcination temperature 700 o C, time 6h. The product is filtered, washed and then dried to obtain the fuel cell electrode active material Pt 3 Mn / C.

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Abstract

The invention discloses a method for preventing intermetallic compounds from agglomeration and growth at a high temperature and an application, and belongs to the field of new energy materials. The method comprises the following steps of (1) performing ultrasonic stirring and uniform mixing on chloroplatinic acid, non-noble metal salt, a carbon material solution and polyvinyl alcohol, and then carrying out freezing and drying; and (2) putting the product obtained in the step (1) into an H2 / Ar environment and carrying out high-temperature quenching at 600-800 DEG C to obtain a fuel cell catalyst PtM / C. The method for preventing particle agglomeration and growth is simple, the control is convenient, the yield is large, and the industrialization is easy. The prepared PtM / C catalyst is used for oxygen reduction reaction of a fuel cell and shows high reaction performance.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a method and application for preventing the agglomeration and growth of intermetallic compounds at high temperatures. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has important advantages such as high energy conversion efficiency and zero pollution, and is known as the most important new energy technology in the 21st century. At present, fuel cell vehicles in domestic and foreign demonstration operation have reached a level comparable to traditional vehicles in terms of vehicle performance, reliability and environmental adaptability. However, due to cost and durability issues, the commercialization of fuel cells still faces huge challenges. challenge. [0003] One of the main factors affecting the performance and cost of fuel cells is the cathode catalyst. Ordered intermetallic compound catalysts are currently an important direction for...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9016H01M4/9083Y02E60/50
Inventor 崔志明章本天李威梁乐程
Owner SOUTH CHINA UNIV OF TECH
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