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Polyhedral Pd-Pt alloy nano catalyst and preparation method and application of nano catalyst

A nano-alloy and catalyst technology, applied in the field of electrochemical energy, can solve the problems of high cost and limited platinum resources, and achieve the effects of good dispersion, lower manufacturing costs, and reduced usage.

Inactive Publication Date: 2015-04-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, platinum-based noble metal catalysts have limitations such as high cost and limited platinum resources, which have become important factors restricting the development and commercialization of direct formic acid fuel cell technology.

Method used

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  • Polyhedral Pd-Pt alloy nano catalyst and preparation method and application of nano catalyst
  • Polyhedral Pd-Pt alloy nano catalyst and preparation method and application of nano catalyst
  • Polyhedral Pd-Pt alloy nano catalyst and preparation method and application of nano catalyst

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Embodiment 1

[0029] The preparation of embodiment 1, Pt1Pd9 alloy

[0030] Get 5.2mg of chloroplatinic acid solid and 15.9mg of palladium chloride solid (the ratio of platinum to palladium is 1:9) and dissolve in the mixed solution of methanol and water (the volume ratio of methanol to water is 1:1); 117.3mg octaaminosilsesquioxane (the mol ratio of metal precursor and octaaminosilsesquioxane is 1: 1), use 1mol / L hydrochloric acid solution to adjust the pH value of above-mentioned mixed solution to 5 after ultrasonic oscillation, keep Stirring is the full contact and complexation of the stabilizer with Pd ions and Pt ions to obtain the active metal precursor mixed solution; the prepared raw material solution is transferred to a hydrothermal reactor, the reaction temperature is 90-170 °C, and the reaction time is 10 h; The reduced nanomaterials are separated from the liquid, washed with water and ethanol several times, and heated and dried in a vacuum oven at 50-90°C to prepare polyhedral P...

Embodiment 2

[0033] The preparation of embodiment 2, Pt3Pd7 alloy

[0034]Get 15.5mg of chloroplatinic acid solid and 12.5mg of palladium chloride solid (the ratio of platinum to palladium is 3:7) and dissolve in the mixed solution of methanol and water (the volume ratio of methanol to water is 3:1); 234.6mg octaaminosilsesquioxane (the mol ratio of metal precursor and octaaminosilsesquioxane is 1: 5), use 1mol / L hydrochloric acid solution to adjust the pH value of above-mentioned mixed solution to 3 after ultrasonic oscillation, keep Stir to fully contact and complex the stabilizer with Pd ions and Pt ions to obtain a mixed solution of active metal precursor; transfer the prepared raw material solution to a hydrothermal reactor, the reaction temperature is 90-170 ° C, and the reaction time is 6 h; The reduced nanomaterials are separated from the liquid, washed with water and ethanol several times, and heated and dried in a vacuum oven at 50-90°C to prepare polyhedral Pt3Pd7 alloy nanocata...

Embodiment 3

[0036] The preparation of embodiment 3, Pt5Pd5 alloy

[0037] Get 25.9mg of chloroplatinic acid solid and 8.9mg of palladium chloride solid (the ratio of platinum to palladium is 5:5) and dissolve in the mixed solution of methanol and water (the volume ratio of methanol to water is 6:1); 234.6mg octaaminosilsesquioxane (the mol ratio of metal precursor and octaaminosilsesquioxane is 1: 2), use 1mol / L hydrochloric acid solution to adjust the pH value of above-mentioned mixed solution to 7 after ultrasonic oscillation, keep Stir to make the stabilizer fully contact and complex with Pd ions and Pt ions to obtain the active metal precursor mixed liquid; transfer the prepared raw material liquid to a hydrothermal reaction kettle, the reaction temperature is 90-170 ° C, and the reaction time is 5 h; The reduced nanomaterials are separated from the liquid, washed with water and ethanol several times, and heated and dried in a vacuum oven at 50-90°C to prepare polyhedral Pt5Pd5 alloy ...

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Abstract

The invention belongs to the technical field of electrochemical energy and relates to a polyhedral Pt-Pd alloy nano catalyst. The preparation method comprises the following steps: by taking octa-aminosilsesquioxane as a stabilizer and taking methanol as a reducing agent, preparing by virtue of a hydrothermal method to obtain the octahedral Pt-Pd alloy nano catalyst with consistent morphology and good dispersity. The polyhedral Pt-Pd alloy nano catalyst has the advantages that the active surface area is large, the catalytic activity is high, harsh conditions are not needed in the reaction, and the operation is simple and feasible. Moreover, the catalyst has huge application prospects in direct formic acid fuel cell anode catalysts.

Description

technical field [0001] The invention belongs to the technical field of electrochemical energy, and in particular relates to the preparation and application of a polyhedral Pt-Pd alloy nano catalyst. Background technique [0002] Due to its advantages of high efficiency, high energy density, zero emission, and fast start-up, fuel cells are known as the most promising high-efficiency and clean power generation technology in the 21st century. Due to the problems of low anode catalyst performance, easy poisoning, easy methanol permeation of Nafion membrane, and methanol toxicity in the current research of direct methanol fuel cells, direct formic acid fuel cells have attracted extensive attention as a substitute for direct methanol fuel cells. Among them, the anode catalyst based on Pt and Pt-based metals is one of the most important key materials for direct formic acid fuel cells. However, platinum-based noble metal catalysts have limitations such as high cost and limited plat...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J35/02H01M4/92
CPCY02E60/50
Inventor 王怡红李玉松魏术海
Owner SOUTHEAST UNIV
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