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High-performance fuel cell catalyst and preparation method thereof

A fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of increased fuel cell cost, high price, and lack of Pt resources, and achieve improved catalyst activity and stability, convenient operation, and superior performance Effect

Active Publication Date: 2016-05-11
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the lack of Pt resources, the price is expensive, and compared with the anode of polymer membrane fuel cells, the oxygen reduction reaction rate of the cathode is low, which determines the need to increase the amount of Pt in the cathode, which greatly increases the cost of the fuel cell.

Method used

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  • High-performance fuel cell catalyst and preparation method thereof
  • High-performance fuel cell catalyst and preparation method thereof
  • High-performance fuel cell catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60min, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then, 0.9 mmol of titanium isopropoxide was added to the mixed liquid and ultrasonicated for 30 min. Continue to add 2ml of 1mol / L lithium triethyl borohydride to the mixed liquid, and then add 0.1mmol of sodium chloroaurate after ultrasonic reaction for 30 minutes, and ultrasonic for 60 minutes. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. figure 1 Scanning Transmission Microscopy-Electron Energy Loss Spectroscopy (STEM-EELS) element content surface scanning map of TiO2-modified Au nanoparticles, from figure 1 It can be seen that in the titanium dioxide-modified gold nanoparticles prepared by the method, titanium is distributed on the surface of the gold nanoparticles, and concentrates on the edges and corners of the gold nanopar...

Embodiment 2

[0047] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60min, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then, 0.3 mmol of titanium isopropoxide was added to the mixed liquid and ultrasonicated for 30 min. Continue to add 2ml of 1mol / L lithium triethyl borohydride to the mixed liquid, add 0.1mmol of sodium chloroaurate after reacting for 30min, and ultrasonicate for 60min. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. Finally, the underpotential deposition method is used to deposit a single layer of copper on the surface of the prepared gold nanoparticles, and no deposition occurs on the surface of titanium dioxide, and then it is placed in a solution containing a platinum salt to undergo a displacement reaction, so that the copper is replaced by platinum to form a single layer. Platinum, repeating this step can also deposit double-la...

Embodiment 3

[0049] Weigh 140g of carbon black and place it in 50ml of absolute ethanol, after ultrasonication for 60min, add 300mg of sodium citrate to the mixed liquid, and ultrasonication for 30min. Then add 0.8 mmol of vanadium dichloride to the mixed liquid, and ultrasonicate for 30 min. Continue to add 3ml of 1mol / L lithium triethyl borohydride to the mixed liquid, and then add 0.14mmol of sodium chloroaurate after ultrasonic reaction for 60 minutes, and ultrasonic for 60 minutes. The mixed liquid was centrifuged, filtered, washed with deionized water, and then dried in a vacuum oven. Finally, the underpotential deposition method is used to deposit a single layer of copper on the surface of the prepared gold nanoparticles, and no deposition occurs on the surface of vanadium oxide, and then it is placed in a solution containing a platinum salt to undergo a displacement reaction, so that the copper is replaced by platinum to form a single layer. Repeating this step can also deposit do...

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Abstract

The invention relates to a high-performance fuel cell catalyst and a preparation method thereof. The high-performance fuel cell catalyst is composed of metal and metal oxide, and the metal oxide is positioned at edges and apex corners, having low coordination number, of surfaces of metal nanoparticles. The preparation method of the fuel cell catalyst of a novel structure is simple, convenient to operate and free of environment pollution; the fuel cell catalyst prepared by the method has high oxygen reduction reaction activity and stability and is suitable for fuel cell electrodes and especially suitable for electrolyte membrane fuel cell electrodes.

Description

technical field [0001] The invention belongs to the field of fuel cell catalysts, in particular to a high-performance fuel cell catalyst and a preparation method thereof. Background technique [0002] Energy is closely related to social progress and the development of the national economy, and every step forward in human society is closely related to the development and utilization of energy. Every major breakthrough in human energy utilization is accompanied by scientific and technological progress, thereby promoting the development of productivity. With economic growth, technological progress, and population growth, the demand for energy in human society is increasing day by day. With the depletion of fossil energy and the seriousness of environmental pollution, if no effective alternative energy is found, human society will face a comprehensive energy crisis. As a power generation device that directly converts chemical energy into electrical energy, fuel cells are consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCH01M4/921Y02E60/50
Inventor 胡觉张呈旭
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI