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Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof

A technology of platinum nanoparticles and metal nanoparticles, which is applied in the field of electrocatalysis and material science, can solve the problems of high fuel cell prices, high platinum prices, and limited reserves, and achieve improved catalytic efficiency, anti-poisoning ability, and easy operation , promote the effect of uniform alloying

Active Publication Date: 2013-04-03
广东一纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the core component of the fuel cell, the catalyst is the top priority in the research of the fuel cell. At present, the two catalysts used in the fuel cell are mainly pure Pt / C and PtRu / C. Due to the high price of platinum, the reserves are limited, and More than 90% of the world's platinum resources are distributed in South Africa and Russia, and the high cost of catalysts is the fundamental reason for the high price of fuel cells

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  • Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof
  • Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof
  • Ternary carbon loaded palladium tin platinum nanoparticle catalyst and preparation method thereof

Examples

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example 1

[0030] A ternary carbon-supported palladium-tin-platinum nanoparticle catalyst. The catalyst is made of vulcan-72R nano-carbon powder as a carrier. The metal nanoparticle loaded is an alloy of palladium, tin and platinum. The metal nanoparticle content in the catalyst is about 40wt. %, the content of nano-carbon powder is about 60wt.%, the atomic ratio of palladium and tin in the metal nanoparticles is 1:1, and the ratio of platinum atoms to the palladium atoms or tin atoms is 0.5:1.

[0031] The above-mentioned ternary carbon-supported palladium-tin-platinum nanoparticle catalyst preparation method is as follows:

[0032] Add palladium chloride, stannous chloride, and potassium chloroplatinate with a palladium-tin-platinum molar ratio of 2:2:1 into the ethylene glycol solution, and stir ultrasonically for 2 hours.

[0033] Weigh nano-carbon powder 1.5 times the total mass of the three metal elements, add it to a citric acid solution with a concentration of 0.2 moles per liter...

example 2

[0038] A ternary carbon-supported palladium-tin-platinum nanoparticle catalyst, the catalyst is made of vulcan-72R nano-carbon powder as a carrier, and the supported metal nanoparticle is an alloy of palladium, tin and platinum, and the atomic ratio of palladium and tin in the metal nanoparticle is 1:1, the ratio of platinum atoms to the palladium atoms or tin atoms is 0.7:1, the content of metal nanoparticles in the catalyst is 20wt.%, and the content of nano-carbon powder is 80wt.%.

[0039] The above-mentioned ternary carbon-supported palladium-tin-platinum nanoparticle catalyst preparation method is as follows:

[0040] Add palladium chloride, stannous chloride, and potassium chloroplatinate with a palladium-tin-platinum molar ratio of 3:3:2 into the ethylene glycol solution, and stir ultrasonically for 1 h.

[0041] Weigh the nano-carbon powder which is 4 times the total mass of the three metal elements, add it into the citric acid solution with a concentration of 0.1 mol...

example 3

[0045]A ternary carbon-supported palladium-tin-platinum nanoparticle catalyst, the catalyst is made of vulcan-72R nano-carbon powder as a carrier, and the supported metal nanoparticle is an alloy of palladium, tin and platinum, and the atomic ratio of palladium and tin in the metal nanoparticle is 1:1, the ratio of platinum atoms to the palladium atoms or tin atoms is 0.25:1, the content of metal nanoparticles in the catalyst is 10wt.%, and the content of nano-carbon powder is 90wt.%.

[0046] The above-mentioned ternary carbon-supported palladium-tin-platinum nanoparticle catalyst preparation method is as follows:

[0047] Add palladium chloride, stannous chloride, and potassium chloroplatinate with a palladium-tin-platinum molar ratio of 4:4:1 into the ethylene glycol solution, and stir ultrasonically for 2 hours.

[0048] Weigh nano-carbon powder 9 times the total mass of the three metal elements, add it to a citric acid solution with a concentration of 0.2 moles per liter,...

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Abstract

The invention discloses a ternary carbon loaded palladium tin platinum nanoparticle catalyst and a preparation method thereof. The preparation method includes: dissolving a palladium-containing metal salt and a tin-containing metal salt in ethylene glycol, with the palladium and the tin being in an atom ratio of 1:1, adding a platinum metal salt, with the platinum atom and the palladium atom or the tin atom being in a ratio of 0.001:1-0.8:1, finally adding nanoscale carbon powder as a carrier of metal nanoparticles, conducting ultrasonic dispersion to obtain a uniform mixed solution, and then adding a sodium borohydride solution into the mixed solution in a dropwise manner, thus obtaining the highly dispersed ternary carbon loaded palladium tin platinum nanoparticle catalyst. In the invention, ethylene glycol is adopted as the solvent due to its high viscosity, so that the metal ion reduction and precipitation process can be more uniform, and palladium tin platinum nanoparticles with better dispersibility can be generated. The ternary palladium tin platinum nanoparticles prepared in the invention have a particle size of 2-5nm, and electrochemical tests show that the nanoparticles present obvious activity in electrocatalytic oxidation of ethanol and formic acid. The method provided in the invention is simple, and is suitable for large-scale preparation of anode catalyst materials for direct ethanol and formic acid fuel cells.

Description

technical field [0001] The invention relates to a ternary carbon-supported palladium-tin-platinum nanoparticle catalyst and a preparation method thereof, which can be used for the electrocatalytic oxidation reaction of small organic molecules (ethanol, methanol, formic acid, etc.) liquid fuels, in particular to a highly dispersed, The invention discloses a ternary carbon-supported palladium-tin-platinum nanoparticle catalyst with low platinum loading and a preparation method thereof, which belong to the field of material science and technology and the field of electrocatalysis. Background technique [0002] The fuel cell directly converts the chemical energy of the fuel into electrical energy through the electrochemical reaction that occurs on its cathode and anode electrodes. It has the advantages of high energy conversion rate, no pollution, and low noise. It is considered to be the first choice for clean and efficient fuel cells in the 21st century. Power generation techn...

Claims

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Application Information

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IPC IPC(8): H01M4/92B01J23/62
CPCY02E60/50
Inventor 王孝广朱复春柏中朝杭瑞强唐宾
Owner 广东一纳科技有限公司
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