PtNi polyhedral nanochain, preparation method thereof and application

A polyhedron, nanochain technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of poor dispersion of Pt-Ni nanoparticles, poor catalytic performance, and low yield. , to achieve high catalytic activity and anti-poisoning ability, excellent performance and high yield.

Active Publication Date: 2021-12-28
ZHENGZHOU UNIV
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Problems solved by technology

[0003] The chain-like Pt-Ni nanoparticles prepared in the existing literature (preparation, characterization and high-efficiency electrocatalytic performance of chain-like Pt-Ni nanoparticles, Acta Physica Sinica, Vol. 69, No. 7, 2020) mainly have the following problems: chain-like Pt-Ni nanoparticles The dispersion of Pt-Ni nanoparticles is not good, most

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  • PtNi polyhedral nanochain, preparation method thereof and application
  • PtNi polyhedral nanochain, preparation method thereof and application
  • PtNi polyhedral nanochain, preparation method thereof and application

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Embodiment 1

[0029] like figure 1 Shown, a kind of preparation method of PtNi polyhedron nanochain comprises the following steps:

[0030] (1) Weigh 20mg of platinum acetylacetonate, 6.4mg of nickel acetylacetonate, 32mg of cetyltrimethylammonium chloride and 90mg of glucose in a beaker, then add 22mL of oleylamine into the beaker, and mix them uniformly by ultrasonic to obtain For solution A, the ultrasonic time is greater than 1.5h;

[0031] (2) Transfer the solution A to the inner lining of the reaction kettle with a capacity of 25mL, seal it and raise the temperature to 160°C and keep it for 20 hours. After the reaction is over, take out the reaction kettle after naturally cooling to room temperature to obtain the solution B;

[0032] (3) solution B is centrifuged to obtain intermediate product, and intermediate product is dispersed in ethanol through ultrasonic wave, then centrifugation precipitation, disperse centrifugation process and repeat 3 times, dry under vacuum environment, o...

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Abstract

The invention provides a PtNi polyhedral nanochain, a preparation method thereof and application. The PtNi polyhedral nanochain is of a one-dimensional linear structure formed by connecting a plurality of PtNi polyhedral nano particles in series through a PtNi nanowire. The size of the PtNi polyhedral nanoparticles is 7-15 nanometers, the diameter of the PtNi nanowire is 0.5-3 nanometers, and the length of the PtNi nanowire is 50-300 nanometers. The PtNi polyhedral nanochain is applied to cathode reaction of a proton exchange membrane fuel cell, the performance of the PtNi polyhedral nanochain is superior to that of commercial Pt/C, the PtNi polyhedral nanochain has higher catalytic activity and poison resistance, and a catalyst can maintain higher electro-catalytic performance in a long time; compared with PtNi nanoparticles, the nanostructure can maintain the one-dimensional linear structure and has good electro-catalysis stability; and compared with a one-dimensional PtNi nanowire, the nanostructure can have a higher surface-body ratio, and more active sites are provided in an electro-catalytic reaction.

Description

technical field [0001] The invention relates to the field of electrocatalysts, in particular to a PtNi polyhedron nanochain and its preparation method and application. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is considered as a very promising sustainable energy conversion device due to its high efficiency and environmental friendliness. The cathode reaction of the fuel cell - the oxygen reduction reaction is slower than the anodic oxidation reaction, so it determines the overall efficiency of the PEMFC and is the key to improving the reaction efficiency of the PEMFC. Commercial Pt / C electrocatalysts can greatly alleviate the problems of sluggish reaction kinetics and high overpotential of the oxygen reduction reaction, and are the catalysts currently used in industry. However, Pt reserves are limited and expensive, which adds a lot of cost to the production of PEMFC. PtNi nanomaterials are considered to be very effective catalysts for oxygen...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F9/24B82Y30/00H01M4/92B82Y40/00
CPCB22F9/24H01M4/921B82Y30/00B82Y40/00Y02E60/50
Inventor 夏田雨郭海中赵凯
Owner ZHENGZHOU UNIV
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