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Multi-hole ultrathin palladium nanosheet catalyst and preparation method and application thereof

A palladium nano-catalyst technology, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem that the structure of multi-hole ultra-thin palladium nanosheets has not yet been realized, and achieves improved electrocatalysis of formic acid. The effect of activity and stability, high practical value, and high catalytic activity of formic acid oxidation

Inactive Publication Date: 2020-02-14
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the construction of multi-hole ultrathin palladium nanosheet structure has not yet been realized.

Method used

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  • Multi-hole ultrathin palladium nanosheet catalyst and preparation method and application thereof
  • Multi-hole ultrathin palladium nanosheet catalyst and preparation method and application thereof
  • Multi-hole ultrathin palladium nanosheet catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Blow nitrogen into 53mL methanol for 30min to remove dissolved oxygen in methanol, then adjust the methanol to 60°C;

[0034] (2) Pass carbon monoxide to carbon monoxide saturation in above-mentioned methanol, the flow velocity of CO is 80mL / min;

[0035] (3) Add 12 mg of sodium chloropalladate to 2 mL of methanol, feed nitrogen to remove dissolved oxygen in the solution, then quickly add to the methanol saturated with carbon monoxide obtained in step (2), and continue the reaction for 5 min;

[0036] (4) The product obtained in step (3) is subjected to centrifugal cleaning.

[0037] figure 1 The transmission electron microscope image of the multi-hole ultra-thin palladium nanosheet catalyst prepared in Example 1; it can be clearly seen from the figure that the prepared multi-hole ultra-thin palladium nanosheet catalyst has an obvious multi-hole structure.

[0038] Prepare 0.5M H 2 SO 4 The solution was used as an electrolyte solution, and nitrogen gas was passe...

Embodiment 2

[0044] (1) Blow nitrogen into 48mL methanol for 30min to remove dissolved oxygen in methanol, then adjust the methanol to 40°C;

[0045] (2) Pass carbon monoxide to carbon monoxide saturation in above-mentioned methanol, the flow velocity of CO is 100mL / min;

[0046] (3) Add 5 mg of sodium chloropalladate to 2 mL of methanol, feed nitrogen to remove dissolved oxygen in the solution, then quickly add to the methanol saturated with carbon monoxide obtained in step (2), and continue the reaction for 10 min;

[0047] (4) The product obtained in step (3) is subjected to centrifugal cleaning.

[0048] Figure 5 The transmission electron microscope image of the multi-hole ultra-thin palladium nanosheet catalyst prepared in Example 2; it can be clearly seen from the figure that the prepared multi-hole ultra-thin palladium nanosheet catalyst has an obvious multi-hole structure.

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Abstract

The invention belongs to the technical field of direct formic acid fuel cell electrocatalysts, and relates to a multi-hole ultrathin palladium nanosheet catalyst and a preparation method and application thereof. The method comprises the steps of (1) introducing an inert gas or nitrogen into methanol to remove oxygen dissolved in the methanol, and then heating the methanol to a certain temperature;(2) introducing carbon monoxide into the methanol obtained in the step (1) until the methanol is saturated; (3) adding sodium tetrachloropalladate into another part of methanol, then introducing an inert gas or nitrogen into the methanol to remove oxygen dissolved in the solution, then adding the solution into the methanol saturated by carbon monoxide obtained in the step (2), and continuing to react; and (4) cleaning the product obtained in the step (3). The catalyst prepared according to the invention has an ultra-large electrochemical activity specific surface area, ultra-high formic acidcatalytic oxidation activity and excellent electrochemical stability, and the method does not involve the use of surface active materials such as polyvinylpyrrolidone (PVP) and cetyltrimethylammoniumbromide (CTAB).

Description

technical field [0001] The invention belongs to the technical field of electrocatalysts for direct formic acid fuel cells, and relates to a multi-hole ultra-thin palladium nanosheet catalyst and a preparation method and application thereof. Background technique [0002] A fuel cell is a device that directly converts chemical energy into electrical energy. It has the characteristics of high energy conversion efficiency, environmental friendliness, and easy assembly. It has important application potential in electric vehicles and as a portable power supply. Direct formic acid fuel cell is an important type of fuel cell. This type of battery uses liquid formic acid as the anode fuel, which has high safety in the process of storage, transportation and use, and the formate and perfluorosulfonate in the proton exchange membrane have electrostatic repulsion, thereby reducing the formic acid passing through the proton exchange membrane. penetration rate. However, the electrocataly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M8/1009B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/92H01M8/1009Y02E60/50
Inventor 张连营欧阳伊睿
Owner QINGDAO UNIV
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