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Pd<x>Pt<(50-x)>Bi<50> ternary alloy nanoparticles as well as preparation method and application thereof

A ternary alloy and nanoparticle technology, applied in the field of alloy materials and electrochemistry, can solve the problems of ORR activity and stability need to be improved, and achieve the effect of being conducive to large-scale preparation, simple method, and excellent ORR test catalytic activity.

Active Publication Date: 2021-07-20
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing studies have shown that the ORR activity and stability of BiPt alloys need to be improved. In addition, there are very few reports on highly active HER electrocatalysts based on BiPt alloys.

Method used

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  • Pd&lt;x&gt;Pt&lt;(50-x)&gt;Bi&lt;50&gt; ternary alloy nanoparticles as well as preparation method and application thereof
  • Pd&lt;x&gt;Pt&lt;(50-x)&gt;Bi&lt;50&gt; ternary alloy nanoparticles as well as preparation method and application thereof
  • Pd&lt;x&gt;Pt&lt;(50-x)&gt;Bi&lt;50&gt; ternary alloy nanoparticles as well as preparation method and application thereof

Examples

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Embodiment 1

[0054] A single-phase Pd with a hexagonal close-packed structure in this embodiment 15 Pt 35 Bi 50 A method for synthesizing ternary alloy nanoparticles, the method comprising the steps of:

[0055] (1) Put 10-15mL of liquid octadecene solvent with 90% purity and 5-10mL of oleylamine solvent with 90% purity into a four-necked glass flask to obtain a mixed solvent; After passing high-purity nitrogen gas for 30 minutes, pour 0.285mmol of bismuth acetate, 1.5mmol of 1,2-hexadecanediol, and 1.1g of cetyltrimethylammonium bromide into the mixed solvent and heat to 80°C to dissolve , while maintaining mechanical stirring at a speed of 1000 rpm. After the bismuth acetate is completely dissolved, add 1 to 3 mL of oleic acid with a purity of 90% to the above-mentioned four-neck glass flask, stir for 5 minutes and mix well, and then mix the resulting mixture for 1 Continue heating to 120°C to 130°C for 1 hour, and after the reaction is completed, a partially reduced Bi precursor is o...

Embodiment 2

[0058] A single-phase Pd with a hexagonal close-packed structure in this embodiment 5 Pt 45 Bi 50 A method for synthesizing ternary alloy nanoparticles, the method comprising the steps of:

[0059] (1) Put 10-15mL of liquid octadecene solvent with 90% purity and 5-10mL of oleylamine solvent with 90% purity into a four-necked glass flask to obtain a mixed solvent; After passing high-purity nitrogen gas for 30 minutes, pour 0.222mmol of bismuth acetate, 1.5mmol of 1,2-hexadecanediol, and 1.1g of cetyltrimethylammonium bromide into the mixed solvent and heat to 80°C to dissolve , while maintaining mechanical stirring at a speed of 1000 rpm; after the bismuth acetate is completely dissolved, add 1 to 3 mL of oleic acid with a purity of 90% to the above-mentioned four-necked glass flask, stir for 5 minutes and mix well, and then mix the resulting mixture for 1 Continue heating to 130°C to 140°C for 1 hour, and after the reaction is completed, a partially reduced Bi precursor is ...

Embodiment 3

[0062] A single-phase Pd with a hexagonal close-packed structure in this embodiment 10 Pt 40 Bi 50 A method for synthesizing ternary alloy nanoparticles, the method comprising the steps of:

[0063] (1) Put 10-15mL of liquid octadecene solvent with 90% purity and 5-10mL of oleylamine solvent with 90% purity into a four-necked glass flask to obtain a mixed solvent; After passing high-purity nitrogen gas for 30 minutes, sequentially pour 0.205 mmol of bismuth acetate, 1.5 mmol of 1,2 hexadecanediol, and 1.1 g of cetyltrimethylammonium bromide into the mixed solvent and heat to 80°C to dissolve , while maintaining mechanical stirring at a speed of 1000 rpm. After the bismuth acetate is completely dissolved, add 1 to 3 mL of oleic acid with a purity of 90% to the above-mentioned four-neck glass flask, stir for 5 minutes and mix well, and then mix the resulting mixture for 1 Continue heating to 120°C to 130°C for 1 hour, and after the reaction is completed, a partially reduced B...

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Abstract

The invention discloses single-phase Pd<x>Pt<(50-x)>Bi<50> ternary alloy nanoparticles with a close-packed hexagonal structure as well as a preparation method and application thereof, and belongs to the technical field of alloy materials and electrochemistry. The Pd<x>Pt<(50-x)>Bi<50> ternary alloy nanoparticles are prepared and synthesized through a polyhydric alcohol reduction method, the particles are of a single close-packed hexagonal structure, the molar ratio of the Pd component in the alloy is 2.5-15, and the size of the nanoparticles is 10-50 nm. The Pd<x>Pt<(50-x)>Bi<50> ternary alloy nanoparticles synthesized by the method have the advantages of low Pt content, no impurity phase, high ORR and HER activity and stability, and have potential value for realizing large-scale application of a technology with less platinum in the aspects of fuel cells and commercial electrolyzed water.

Description

technical field [0001] The invention belongs to the technical field of alloy materials and electrochemistry, in particular to a single-phase Pd with a hexagonal close-packed structure x Pt (50-x) Bi 50 Ternary alloy nanoparticles and its preparation method and application. Background technique [0002] Oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) are the core processes in advanced energy storage and conversion technologies such as fuel cells, electrolyzed water, and metal-air batteries. At present, the best catalysts for electrochemical ORR, OER and HER are Pt-based noble metals. Considering the scarcity and single functionality of Pt catalysts, the use of alloying methods to adjust its electronic structure has become an important means to reduce the amount of Pt metal and improve catalytic performance. . Among many Pt-based alloys, the BiPt alloy nanostructure has a unique electronic structure, has good resistan...

Claims

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Application Information

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IPC IPC(8): B22F1/00C22C12/00B22F9/24C25B11/089C25B1/04H01M4/90H01M4/92
CPCC22C12/00B22F9/24C25B1/04H01M4/9058H01M4/921B22F1/054Y02E60/36Y02E60/50
Inventor 常靖汪汉斌杨成赵磊万厚钊陈旭王浩
Owner HUBEI UNIV
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