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Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation

A technology of nano-copper oxide and palladium nanowires, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. The type cannot be adjusted, etc., to achieve the effect of improving the catalytic activity of methanol oxidation, the interface type can be adjusted, and the interaction is strong

Active Publication Date: 2020-12-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the interaction strength between the active species at the interface of the directly synthesized palladium-based heterostructure catalyst is not high, and the interface type cannot be adjusted.

Method used

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  • Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation
  • Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation
  • Nano copper oxide coated palladium nanowire heterogeneous catalyst, preparation method thereof and application thereof in methanol electrocatalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] ①Add 17.7mg of palladium chloride to 15mL of deionized water, ultrasonically disperse to a uniform turbid suspension, then add 300mg of sodium iodide and 800mg of polyvinylpyrrolidone, and carry out 15min magnetic stirring and 15min ultrasonic dispersion at room temperature processing to obtain a dark brown suspension;

[0036] ② Put the suspension obtained in step ① in a high-pressure reactor, heat it to 200 ° C, keep it for 2 hours, take out the suspension after cooling it down quickly with water, add isopropanol and let it stand for 3 hours, centrifuge, and wash to obtain the Pd nanowire catalyst , dispersed in 2mL absolute ethanol for use;

[0037] ③ Dissolve a certain amount of anhydrous copper chloride and L-ascorbic acid in 8 mL of deionized water, and record it as solution A. Wherein the molar ratio of L-ascorbic acid and anhydrous copper chloride is 1:0.5. Add the ethanol suspension of Pd nanowires obtained in step ② into solution A, and disperse evenly by ul...

Embodiment 2

[0040] ①Add 17.7mg of palladium chloride to 15mL of deionized water, ultrasonically disperse to a uniform turbid suspension, then add 300mg of sodium iodide and 800mg of polyvinylpyrrolidone, and carry out 15min magnetic stirring and 15min ultrasonic dispersion at room temperature processing to obtain a dark brown suspension;

[0041] ② Put the suspension obtained in step ① in a high-pressure reactor, heat it to 200 ° C, keep it for 2 hours, take out the suspension after cooling it down quickly with water, add isopropanol and let it stand for 3 hours, centrifuge, and wash to obtain the Pd nanowire catalyst , dispersed in 2mL absolute ethanol for use;

[0042] ③ Dissolve a certain amount of anhydrous copper chloride and L-ascorbic acid in 8 mL of deionized water, and record it as solution A. Wherein the molar ratio of L-ascorbic acid and anhydrous copper chloride is 1:1. Add the ethanol suspension of Pd nanowires obtained in step ② into solution A, and disperse evenly by ultr...

Embodiment 3

[0045] ①Add 17.7mg of palladium chloride to 15mL of deionized water, ultrasonically disperse to a uniform turbid suspension, then add 300mg of sodium iodide and 800mg of polyvinylpyrrolidone, and carry out 15min magnetic stirring and 15min ultrasonic dispersion at room temperature processing to obtain a dark brown suspension;

[0046] ② Put the suspension obtained in step ① in a high-pressure reactor, heat it to 200 ° C, keep it for 2 hours, take out the suspension after cooling it down quickly with water, add isopropanol and let it stand for 3 hours, centrifuge, and wash to obtain the Pd nanowire catalyst , dispersed in 2mL absolute ethanol for use;

[0047] ③ Dissolve a certain amount of anhydrous copper chloride and L-ascorbic acid in 8 mL of deionized water, and record it as solution A. Wherein the molar ratio of L-ascorbic acid and anhydrous copper chloride is 1:1.5. Add the ethanol suspension of Pd nanowires obtained in step ② into solution A, and disperse evenly by ul...

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Abstract

The invention discloses a nano copper oxide coated palladium nanowire heterogeneous catalyst, a preparation method thereof and an application thereof in methanol electrocatalytic oxidation, and the preparation method comprises the following steps: adding a palladium source, sodium iodide and polyvinylpyrrolidone into a high-pressure reaction kettle for hydrothermal reaction to prepare palladium nanowires, cleaning and drying the obtained product, re-dispersing the product in ethanol, mixing the ethanol dispersion liquid of the obtained product with a copper source and ascorbic acid, adding themixture into a high-pressure reaction kettle, carrying out hydrothermal reaction to prepare an amorphous cuprous oxide coated palladium nanowire catalyst, and carrying out air cooling plasma treatment on the obtained catalyst powder to obtain the crystal nano copper oxide coated palladium nanowire catalyst. The surface of the heterogeneous nano catalytic material has high carbon monoxide poisoning resistance and methanol oxidation catalytic activity, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of composite catalysts, and more specifically relates to a palladium nanowire heterogeneous catalyst coated with nano-copper oxide, a preparation method thereof, and an application in methanol electrocatalytic oxidation. Background technique [0002] Traditional fossil fuel energy includes coal, oil and natural gas, etc., and their massive exploitation and use have caused serious environmental problems. Compared with fossil fuels, direct methanol fuel cells have the following significant advantages, for example, high theoretical energy density (6.1kWh / kg), low-temperature fast start-up, wide range of fuel sources, easy storage and transportation, and low emissions. Currently, they have been used in portable electronic devices, There are quite a wide range of practical applications in military equipment, low-power transportation facilities, and logistics equipment. Electrode catalytic material is the core co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/02B82Y30/00B82Y40/00B01J35/10H01M4/90H01M4/92B01J35/00
CPCB01J23/8926B82Y40/00B82Y30/00H01M4/9016H01M4/921B01J35/33B01J35/50B01J35/61Y02E60/50
Inventor 邓意达陈泽霖陈亚楠胡文彬韩晓鹏张金凤
Owner TIANJIN UNIV