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Preparation method of platinum nanoparticle electrocatalyst based on metal cluster approach

A technology of electrocatalysts and clusters, applied in the field of preparing platinum nano-electrocatalysts, which can solve problems such as catalyst poisoning, high polarization overpotential, and limited commercial development

Inactive Publication Date: 2007-08-01
上海新微科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the high platinum content and high polarization overpotential of the cathode catalyst, the high platinum content of the anode catalyst and the catalyst being easily poisoned by impurity CO partially limit its commercial development.

Method used

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  • Preparation method of platinum nanoparticle electrocatalyst based on metal cluster approach
  • Preparation method of platinum nanoparticle electrocatalyst based on metal cluster approach

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1, the preparation of carbon-supported Pt (60wt.%) / C catalyst

[0014] 1. Weigh 159.7mg of Na 2 PtCl 6 6H 2 The anhydrous sodium acetate of O (metal platinum content 31.3%) and 170.0mg joins in the methyl alcohol of 30ml, Na 2 PtCl 6 6H 2 The concentration of O was 5.3 mg / ml. First pass high-purity nitrogen gas for 15 minutes to remove the air in the solution, then react in a CO atmosphere at 50°C for 20 minutes, and then react at room temperature and in a CO atmosphere for 24 hours to obtain a blue-green platinum cluster solution (group point A).

[0015] 2. Add 33.3 mg of Vulcan XC-72R activated carbon to the obtained component A under nitrogen protection, stir for 6 hours, evaporate methanol to dryness in a nitrogen atmosphere at 60°C, and cool to room temperature (component B).

[0016] 3. The component (B) is filtered, washed repeatedly, and tested with silver nitrate until there is no chloride ion, and then dried in nitrogen at 110° C. to obtain the...

example 2

[0018] The preparation of the nano-platinum catalyst of example 2 unsupported

[0019] 1. Weigh 159.7mg of Na 2 PtCl 6 6H 2 The anhydrous sodium acetate of O (metal platinum content 31.3%) and 170.0mg joins in the methyl alcohol of 30ml, Na 2 PtCl 6 6H 2 The concentration of O was 5.3 mg / ml. First pass high-purity nitrogen gas for 15 minutes to remove the air in the solution, then react in a CO atmosphere at 50°C for 60 minutes, and then react in a CO atmosphere at room temperature for 24 hours to obtain a blue-green platinum cluster solution (component A).

[0020] 2. Add 20 ml of a pre-prepared aqueous solution containing 3% sodium dodecylbenzenesulfonate to the obtained solution under the protection of nitrogen, stir continuously for 6 hours, and then cool to room temperature (component B).

[0021] 3. The component (B) is filtered, washed repeatedly, and tested with silver nitrate until there is no chloride ion, and then dried in nitrogen at 110° C. to obtain the fi...

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Abstract

The invention provides a preparation method of loading-type or no-loading-type platinum millimicron electric accelerant basing on metal cluster composition means. It is characterized by: carbon monoxide and precursor of accelerant reacts in conditions of alkaline and 0-100DEG C to preparing the metal cluster composition solution, namely component (A); adding different carbon carrier or carbon carrier with scattering surfactant under the protection of inactive gas or CO or mixing gas of said both, stirring, removing the solution under the protection of inactive gas or CO or mixing gas of said both and 30-120DEG C, getting component (B); water washing and drying component (B) and preparing the carbon-loading or no-loading-type platinum millimicron particle accelerant component (C), the diameter of platinum millimicron particle in component (C) is small and the distribution of particle size is very narrow. The particle size of millimicron Pt accelerant which prepared by the component (C) under the protection of inactive gas or H2 or CO or mixing gas of said three and 100-500DEG C is ranged from 1.8nm to under 20nm and the distribution is narrow, it applies to cathodic electric accelerant of proton exchange membrane fuel cell.

Description

technical field [0001] The present invention relates to a method for preparing platinum nanometer electrocatalyst based on metal cluster approach, more specifically, it relates to a method for preparing a cathode electrocatalyst for a proton exchange membrane fuel cell, and the prepared platinum nanometer electrocatalyst exhibits great performance on oxygen reduction High catalytic performance. It belongs to the field of energy, catalysis and related technologies. Background technique [0002] Fuel cell power generation devices have high energy conversion efficiency, low environmental pollution, and can be used as ideal power sources in the future. Therefore, scientists from all over the world have attracted extensive attention. For this reason, countries all over the world have invested a lot of manpower, material and financial resources in research. The development of hydrogen-fueled fuel cell (PEMFC) electric vehicles is of great significance in many aspects. It is not o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42H01M4/92
CPCY02E60/50
Inventor 杨辉
Owner 上海新微科技集团有限公司
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