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Preparation method of platinum-palladium nano-alloy anode material for high-performance ethanol catalysis

A nano-alloy and anode material technology, applied in battery electrodes, electrical components, circuits, etc., to achieve the effects of large electroactive surface area, high preparation repeatability, high catalytic performance and stability

Inactive Publication Date: 2015-08-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This patent uses a one-step method to prepare platinum-palladium alloy nanocrystals with concave hexahedral morphology. The polyvinylpyrrolidone used in this patent is a polymer compound, and the head functional group is pyrrolidone. The hexahedral nanocrystals synthesized with the assistance of polyvinylpyrrolidone are not formed. A large number of pores that facilitate molecular diffusion

Method used

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  • Preparation method of platinum-palladium nano-alloy anode material for high-performance ethanol catalysis
  • Preparation method of platinum-palladium nano-alloy anode material for high-performance ethanol catalysis

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Embodiment

[0028] The preparation method of the platinum-palladium nano-alloy anode material of high-performance catalysis ethanol comprises the following steps:

[0029] (1) Add 30mg cetylpyridinium chloride into 10mL ultrapure water and stir thoroughly, then mix sodium tetrachloropalladate and chloroplatinic acid at 10mM-20mM 1:1 volume into the above solution, add dropwise 0.1 600 μL of mol / L ascorbic acid was kept at a certain temperature, and allowed to stand for 4 hours for complete reaction to obtain a platinum-palladium nanoparticle sol stabilized by cetylpyridine chloride micelles. During the reaction process, the color of the sol was initially light brownish yellow and slowly changed to black.

[0030] (2) Cool the prepared sol at room temperature, centrifuge at 10000-20000 rpm for 10 min, wash with water several times to remove excess cetylpyridinium chloride, and set the volume to 1 mL.

[0031] (3) After polishing, the glassy carbon electrode surface (7mm 2 ), drop-coat 10...

Embodiment 2

[0036] The preparation method of the platinum-palladium nano-alloy anode material of high-performance catalysis ethanol comprises the following steps:

[0037] (1) Sodium tetrachloropalladate (concentration is 10mM) and chloroplatinic acid (concentration is 10mM) are added in the aqueous solution of cetylpyridinium chloride (concentration is 5mM), adds ascorbic acid (concentration is 0.05M), and The molar ratio of sodium tetrachloropalladate, chloroplatinic acid, chlorohexadecylpyridine, and ascorbic acid is 3:3:60:60, keep the temperature at 10°C, and leave it for 6 hours to obtain hexadecyl chloride Pyridine micelles stabilized platinum-palladium nanoparticle sol, and the synthesis of platinum-palladium nanoparticles with different shapes was regulated by different temperatures. During the reaction process, the color of the sol was initially light brownish yellow and slowly changed to black.

[0038](2) Cool the platinum palladium nanoparticle sol stabilized by cetylpyridin...

Embodiment 3

[0042] The preparation method of the platinum-palladium nano-alloy anode material of high-performance catalysis ethanol comprises the following steps:

[0043] (1) Sodium tetrachloropalladate (concentration is 20mM) and chloroplatinic acid (concentration is 20mM) are added in the aqueous solution of cetylpyridinium chloride (concentration is 10mM), adds ascorbic acid (concentration is 0.1M), and The molar ratio of sodium tetrachloropalladate, chloroplatinic acid, chlorohexadecylpyridine, and ascorbic acid is 3:3:90:60, and the temperature is maintained at 100°C, and left standing for 3 hours to obtain hexadecyl chloride Pyridine micelles stabilized platinum-palladium nanoparticle sol, and the synthesis of platinum-palladium nanoparticles with different shapes was regulated by different temperatures. During the reaction process, the color of the sol was initially light brownish yellow and slowly changed to black.

[0044] (2) Cool the platinum-palladium nanoparticle sol stabil...

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Abstract

The invention relates to a preparation method of a platinum-palladium nano-alloy anode material for high-performance ethanol catalysis. The preparation method comprises the following steps: adding disodium tetrachloropalladate and chloroplatinic acid to a water solution of hexadecylpyridinium chloride, adding ascorbic acid, maintaining a certain temperature, and allowing the mixture to stand to obtain a platinum-palladium nano-particle sol stabilized by hexadecylpyridinium chloride micelles; cooling the platinum-palladium nano-particle sol, performing high speed centrifugation, repeatedly washing the obtained mixture with water to remove redundant hexadecylpyridinium chloride to obtain a platinum-palladium nano-particle solution; dispensing the platinum-palladium nano-particle solution on the surface of a glassy carbon electrode after polishing treatment, and carrying out cooling and drying to obtain the platinum-palladium nano-alloy anode material for high-performance ethanol catalysis. Compared with the prior art, the preparation method utilizes the hexadecylpyridinium chloride as a morphology guiding agent, nano-particles with different morphologies are synthetized through temperature control, and synthetic nano-clusters are large in superficial area and have relatively high catalytic performance and stability as an alkaline direct ethanol fuel cell catalyst.

Description

technical field [0001] The invention relates to a method for preparing a nano-alloy anode material, in particular to a method for preparing a platinum-palladium nano-alloy anode material that catalyzes ethanol with high performance. Background technique [0002] Among many liquid alcohol fuels, ethanol has become a promising energy source in fuel cells due to its low toxicity, easy storage, easy transportation, high energy density, and low permeability. Therefore, it is necessary to develop a novel and efficient catalyst for ethanol catalysis. [0003] Metal nanoparticles have attracted much attention due to their unique electrical, magnetic, optical, thermal properties, high catalytic activity, and large specific surface area, and have broad application prospects in the field of catalysis. Platinum has attracted people's attention for its unique catalytic performance. However, platinum-based bimetallic catalysts have shown superior performance over monometallic platinum in...

Claims

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Application Information

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IPC IPC(8): H01M4/92
CPCH01M4/921Y02E60/50
Inventor 杨海峰潘羽侠张琦
Owner SHANGHAI NORMAL UNIVERSITY
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