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A general preparation method of flower-shaped porous platinum-based nanocatalyst

A nano-catalyst, platinum-based technology, applied in structural parts, electrical components, battery electrodes, etc., can solve the problems of Pt catalyst poisoning, unfriendly environment, reducing Pt electrochemical activity and stability, etc., to achieve high catalytic activity, preparation Simple and repeatable process, uniform particle size

Inactive Publication Date: 2018-12-07
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its scarce reserves and high price on the earth, the commercial use of fuel cells is greatly limited, and Pt will produce intermediate product CO when oxidizing some fuels, and CO will occupy the active sites on the surface of Pt, making Pt Catalyst poisoning, which reduces the electrochemical activity and stability of Pt
[0004] In addition to the above problems, the traditional preparation methods generally have problems such as being unfriendly to the environment

Method used

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  • A general preparation method of flower-shaped porous platinum-based nanocatalyst
  • A general preparation method of flower-shaped porous platinum-based nanocatalyst
  • A general preparation method of flower-shaped porous platinum-based nanocatalyst

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Experimental program
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Effect test

Embodiment 1

[0026] The flower-shaped Pt nano-catalyst prepared by the preparation method comprises:

[0027] (1) Dissolve 128mg of CTAC, 112mg of glycine and 44mg of ascorbic acid in 14.5mL of water, add 500uL, 0.1M H2PtCl6, stir magnetically to dissolve;

[0028] (2) Transfer the mixed solution to a three-necked flask, and heat in an oil bath at 85 degrees Celsius for 1.5 hours;

[0029] (3) After the reaction, wash the prepared black particles with ultrapure water for 3 to 4 times, and then vacuum-dry to obtain a flower-shaped Pt nanocatalyst

Embodiment 2

[0031] The flower-shaped PdPt nano-catalyst prepared by the preparation method comprises:

[0032] (1) Dissolve 128mg of CTAC, 112mg of glycine and 44mg of ascorbic acid in 14.5mL of water, add 250uL, 0.1M H2PtCl6 and 250uL, 0.1M Na2PdCl4, stir magnetically to dissolve;

[0033] (2) Transfer the mixed solution to a three-necked flask, and heat in an oil bath at 85 degrees Celsius for 1.5 hours;

[0034] (3) After the reaction, wash the prepared black particles with ultrapure water for 3 to 4 times, and then vacuum-dry to obtain the flower-shaped PdPt nanocatalyst

Embodiment 3

[0036] The flower-shaped RhPt nano-catalyst prepared by the preparation method comprises:

[0037] (1) Dissolve 128mg of CTAC, 112mg of glycine and 44mg of ascorbic acid in 14.5mL of water, add 400uL, 0.1M H2PtCl6 and 100uL, 0.1M RhCl3, stir magnetically to dissolve;

[0038] (2) Transfer the mixed solution to a three-necked flask, and heat in an oil bath at 85 degrees Celsius for 1.5 hours;

[0039] (3) After the reaction, wash the prepared black particles with ultrapure water for 3 to 4 times, and then vacuum-dry to obtain the flower-shaped RhPt nanocatalyst

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Abstract

The invention discloses a general preparation method for a flower-like porous platinum-based nano-catalyst. The general preparation method is characterized by comprising the following steps: (1) adding a surface active agent such as cetyltrimethylammonium chloride and reducing agents such as ascorbic acid and glycine into solvent water so that the surface active agent and the reducing agents are completely dissolved, then adding a metal precursor, and carrying out magnetic stirring so that the metal precursor is sufficiently dispersed into the solution; (2) transferring the mixed solution into a three-necked flask, and setting reaction temperature and time for reaction to generate black particles; and (3) after washing the black particles in the second step with ultrapure water, and carrying out vacuum drying to obtain the flower-like platinum-based nano-catalyst.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a preparation method for fuel cell catalysts. Background technique [0002] A fuel cell is a device that can directly convert the chemical energy of fuel into electrical energy. It has the characteristics of high energy conversion rate, less environmental pollution, and sustainable performance. It is an ideal power supply device. It has broad application prospects in electric vehicles, mobile communication power supplies, military power supplies, etc., so it is highly valued by people from all over the world. [0003] Catalyst materials are the key to fuel cells. At present, the preparation methods of catalysts mainly include ion exchange method, impregnation reduction method, gas phase reduction method, precipitation method, microwave hair generation, colloid hair generation, etc., but these methods cannot control the particle size of the catalyst well. , morphology and compo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/92
CPCH01M4/92Y02E60/50
Inventor 袁强黄大兵
Owner GUIZHOU UNIV