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A preparation method of embedded porous pd/c nanoframe and its obtained material and application

An embedded and nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of degradation, electrocatalytic performance and stability attenuation, carrier corrosion performance, etc., to achieve good electrical Chemical stability, high electrocatalytic activity and stability, and the effect of improving electrocatalytic activity

Active Publication Date: 2019-09-10
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carrier used in conventional commercial Pd / C is mostly activated carbon. During the catalytic process, the carrier is easily corroded and the performance is reduced.
In addition, due to the fact that in conventional Pd / C catalysts, Pd and Pd are easily dissolved and agglomerated during the catalytic process, which eventually leads to a rapid decline in electrocatalytic performance and stability.

Method used

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  • A preparation method of embedded porous pd/c nanoframe and its obtained material and application
  • A preparation method of embedded porous pd/c nanoframe and its obtained material and application
  • A preparation method of embedded porous pd/c nanoframe and its obtained material and application

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Embodiment 1

[0032] A preparation method of embedded porous Pd / C nano frame, comprising the following steps:

[0033] 1) Preparation of metal precursor complex: weigh 0.14g naphthylamine (C 10 h 9 N), add 30mL water: ethanol is 0.1:1 in the mixed solvent, fully sonicate it to dissolve; Add 4mL 0.05mol L -1 PdCl 2 Aqueous solution, after standing still, yellow flake Pd(II)-naphthylamine complex can be obtained, which is centrifuged and dried;

[0034] 2) Preparation of embedded porous Pd / C nanoframes: the yellow powder prepared in step 1) was heated at 5°C·min under a nitrogen atmosphere -1 The temperature was raised to 600° C. for heat treatment, kept at this temperature for 3 hours, and then cooled to room temperature to obtain the final product.

Embodiment 2

[0036] A preparation method of embedded porous Pd / C nano frame, comprising the following steps:

[0037] 1) Preparation of metal precursor complex: weigh 0.14g naphthylamine (C 10 h9 N), add 30mL water: ethanol is in the mixed solvent of 99:1, fully ultrasonic makes it dissolve; Add 4mL 0.05mol L -1 PdCl 2 Aqueous solution, after standing still, yellow flake Pd(II)-naphthylamine complex can be obtained, which is centrifuged and dried;

[0038] 2) Preparation of embedded porous Pd / C nanoframes: the yellow powder prepared in step 1) was heated at 5°C·min under a nitrogen atmosphere -1 The temperature was raised to 600° C. for heat treatment, kept at this temperature for 3 hours, and then cooled to room temperature to obtain the final product.

Embodiment 3

[0040] A preparation method of embedded porous Pd / C nano frame, comprising the following steps:

[0041] 1) Preparation of metal precursor complex: weigh 0.002g naphthylamine (C 10 h 9 N), add 30mL of water: ethanol is a 1:1 mixed solvent, fully ultrasonic to make it dissolve; add 4mL 0.05mol L -1 PdCl 2 Aqueous solution, after standing still, yellow flake Pd(II)-naphthylamine complex can be obtained, which is centrifuged and dried;

[0042] 2) Preparation of embedded porous Pd / C nanoframes: the yellow powder prepared in step 1) was heated at 5°C·min under a nitrogen atmosphere -1 The temperature was raised to 600° C. for heat treatment, kept at this temperature for 3 hours, and then cooled to room temperature to obtain the final product.

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Abstract

The invention discloses a preparing method of an embedded porous Pd / C nano frame. The preparing method includes the steps that naphthylamine (C10H9N) serving as a coordinated molecule forms yellow complex precipitate with PdCl2, the precipitate is dried to obtain flaky Pd(II) naphthylamine powder, under inert atmosphere (nitrogen, or argon or carbon dioxide), the temperature is raised to 200-1000 DEG C, then high-temperature self-reduction is carried out to obtain the embedded porous Pd / C nano frame. The method is simple and easy to implement, the raw materials are low in cost, and large-scale production can be achieved. The embedded porous Pd / C nano frame prepared through the method has the advantages of being superfine in particle size (-5.0 nm), high in electrical conductivity and electrochemical activity and good in electrochemical stability and heat stability, and presents high catalytic activity and stability serving as a formic acid oxidation anode catalyst and an oxygen reduction cathode catalyst.

Description

technical field [0001] The invention relates to a preparation method of an embedded porous Pd / C nanoframe with high electrochemical activity and stability, and the catalyst is suitable for electrocatalysis of anodic formic acid oxidation and cathodic oxygen reduction. Background technique [0002] Proton exchange membrane fuel cell (Proton Electrolyte Membrane Fuel Cell, PEMFC) is a new energy device with great application prospects in the 21st century. In addition to the general advantages of fuel cells, such as high power generation efficiency and less environmental pollution, PEMFC can also be used in It has the advantages of quick start at room temperature, no electrolyte loss, high specific power and long life. However, because the key materials and key technologies of PEMFC still need further breakthroughs, and the cost needs to be greatly reduced, it cannot be further commercialized. The catalyst is the key reason for the high cost of the fuel cell. During the workin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44B01J21/18B01J35/10H01M4/92B82Y30/00
CPCB01J21/18B01J23/44B01J35/10B82Y30/00H01M4/926Y02E60/50
Inventor 唐亚文江娴樊闯付更涛孙冬梅徐林
Owner NANJING NORMAL UNIVERSITY
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