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Graphene supported two-dimensional branched platinum nanometer electrocatalyst, and preparation method and application thereof

An electrocatalyst and graphene technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem that the platinum crystal surface cannot be effectively used, and achieve the effect of easy control and simple steps

Active Publication Date: 2015-05-13
ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the foamy platinum has a three-dimensional structure, so that the platinum crystal plane partially wrapped inside the foam cannot be effectively used

Method used

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  • Graphene supported two-dimensional branched platinum nanometer electrocatalyst, and preparation method and application thereof
  • Graphene supported two-dimensional branched platinum nanometer electrocatalyst, and preparation method and application thereof
  • Graphene supported two-dimensional branched platinum nanometer electrocatalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0040]Dissolve 15.80 mg of distearoylphosphatidylcholine (1,2-dioctadecanoyl-sn-glycero-3-phosphocholine) and 7.73 mg of cholesterol in 20 mL of chloroform, and rotary evaporate the solution at 30 °C to prepare multilayered lipids Body membrane, after drying, add 20mL water and 527.1mg ascorbic acid, transfer the mixture to a liposome extruder after hydration at 65°C for 1 hour, select a porous organic filter membrane with a pore size of 200nm, use nitrogen as the pressurized gas, and pressurize at 65°C Squeeze the mixture through a porous organic filter membrane 10 times at °C to obtain 20 mL of an aqueous solution of unilamellar liposomes (1 mM) containing a reducing agent. Add 12.6mg of commercial graphene into the above-mentioned 16mL monolayer liposome aqueous solution containing a reducing agent, ultrasonically disperse evenly, and then add 4.62mL of 20mmol / L K 2 PtCl 4 aqueous solution and 11.38mL H 2 O, the reaction was stirred at 25°C for 3 hours. The reacted mixtu...

Embodiment 2

[0047] Example 2: Concentration of monolamellar liposomes

[0048] Dissolve 39.51mg of distearoylphosphatidylcholine and 19.34mg of cholesterol in 10mL of chloroform, and evaporate the solution at 30°C to prepare a multilayer liposome membrane. After drying, add 10mL of water and 263.5mg of ascorbic acid, 65 After hydration at ℃ for 1 hour, transfer the mixture to a liposome extruder, select a porous organic filter membrane with a pore size of 200 nm, use nitrogen as the pressurized gas, and squeeze the mixture through the porous organic filter membrane 10 times at 65 °C to obtain 10 mL Aqueous solution (5 mM) of unilamellar liposomes containing reducing agent. Add 12.4 mg of commercial graphene to the above-mentioned 8 mL of monolayer liposome aqueous solution containing a reducing agent, ultrasonically disperse evenly, and then add 4.62 mL of 20 mmol / L K 2 PtCl 4 aqueous solution and 3.38mL H 2 O, the reaction was stirred at 25°C for 3 hours. The reacted mixture was tran...

Embodiment 3

[0053] Example 3: The concentration of phospholipids is different, and the ratio of cholesterol to phospholipids is different

[0054] Dissolve 1976mg of distearoylphosphatidylcholine and 19.34mg of cholesterol into 10mL of chloroform, and rotary evaporate the solution at 30°C to prepare a multilayer liposome membrane. After drying, add 10mL of water and 263.5mg of ascorbic acid, and heat After hydration for 1 hour, transfer the mixture to a liposome extruder, select a porous organic filter membrane with a pore size of 200 nm, use nitrogen as the pressurized gas, and squeeze the mixture through the porous organic filter membrane 10 times at 65°C to obtain 10 mL of Aqueous solution of unilamellar liposomes containing reducing agent. Add 12.4 mg of commercial graphene to the above-mentioned 8 mL of monolayer liposome aqueous solution containing a reducing agent, ultrasonically disperse evenly, and then add 4.62 mL of 20 mmol / L K 2 PtCl 4 aqueous solution and 3.38mL H 2 O, the...

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Abstract

The invention provides a graphene supported two-dimensional branched platinum nanometer electrocatalyst, and a preparation method and an application thereof. The preparation method concretely comprises the following steps: dispersing graphene in an aqueous solution containing a lipid bilayer and a reducing agent, adding a platinum salt, and reacting for at least 30min to obtain the graphene supported two-dimensional branched platinum nanometer electrocatalyst with the thickness of 2-3nm. The method has the advantages of simple operation, easy control, mild conditions and environmental protection. The graphene supported two-dimensional branched platinum nanometer electrocatalyst can be used in proton exchange membrane fuel cells.

Description

technical field [0001] The invention belongs to the field of proton exchange membrane fuel cell catalysts, and in particular relates to a two-dimensional branched platinum nano electrocatalyst supported by graphene and its preparation and application. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of fuel into electrical energy in a chemical reaction without combustion. It has the advantages of high energy density, low pollution, diverse fuels, high reliability, low noise, and easy maintenance. It has been highly valued by countries all over the world. One of the urgent issues to be solved to realize the commercialization of PEMFC technology is to improve the activity and durability of platinum-based electrocatalysts. At present, the most commonly used commercial platinum-carbon electrocatalyst is nano-platinum supported by carbon black, and the morphology of platinum is nearly spherical platinum particles of 2-5 nm. The pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCB82Y30/00H01M4/926Y02E60/50
Inventor 宋玉江李佳
Owner ZHANGJIAGANG IND TECH RES INST CO LTD DALIAN INST OF CHEM PHYSICS CHINESE ACADEMY OF SCI
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