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A phosphorus-doped lacoo 3 Bifunctional catalyst and its preparation method and application

A bifunctional catalyst and phosphorus-doped technology, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of poor catalytic activity and achieve uniform distribution, high dispersion, and specific surface area big effect

Active Publication Date: 2021-02-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the LaCoO in the prior art 3 Defects and deficiencies of poor catalytic activity in alkaline solutions, providing a phosphorus-doped LaCoO 3 Preparation method of bifunctional catalyst

Method used

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  • A phosphorus-doped lacoo <sub>3</sub> Bifunctional catalyst and its preparation method and application
  • A phosphorus-doped lacoo <sub>3</sub> Bifunctional catalyst and its preparation method and application
  • A phosphorus-doped lacoo <sub>3</sub> Bifunctional catalyst and its preparation method and application

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Embodiment 1

[0039] This embodiment provides a phosphorus-doped LaCoO 3 (LaCoO 3 -P) bifunctional catalyst, prepared by the following method.

[0040] Weigh 0.02mol of lanthanum oxide and 0.02mol of cobalt tetroxide powder and mix them into the tungsten carbide ball milling tank. The mass ratio of the added tungsten carbide balls to the powder is 10:1. Under the condition of inert gas, seal the tungsten carbide ball milling tank. Preparation of highly active LaCoO by high energy ball milling at 900rpm for 3h 3 Perovskite materials;

[0041] Then the LaCoO synthesized in the previous step 3 Add 0.004mol red phosphorus to the perovskite material, seal the tungsten carbide ball mill jar under the condition of inert gas, and preliminarily prepare phosphorus-doped LaCoO by high-energy ball milling at a speed of 500rpm for 2.5h 3 Perovskite materials;

[0042] Finally, phosphorus-doped LaCoO was preliminarily prepared 3 In the perovskite material, the ratio of the mass of the isopropanol d...

Embodiment 2

[0049] This embodiment provides a phosphorus-doped LaCoO 3 (LaCoO 3 -P composite material) bifunctional catalyst, prepared by the following method.

[0050] Weigh 0.02mol of lanthanum oxide and 0.02mol of cobaltous oxide powder and mix them into a tungsten carbide ball milling jar. The mass ratio of the added tungsten carbide balls to the powder is 5:1. Under the condition of inert gas, seal the tungsten carbide ball milling jar. High activity LaCoO was prepared by high energy ball milling at 1000rpm for 2h 3 Perovskite materials;

[0051] Then the LaCoO synthesized in the previous step 3 Add 0.002mol red phosphorus to the perovskite material, seal the tungsten carbide ball mill jar under the condition of inert gas, and preliminarily prepare phosphorus-doped LaCoO by high-energy ball milling at a speed of 600rpm for 2 hours 3 Perovskite materials;

[0052] Finally, phosphorus-doped LaCoO was preliminarily prepared 3 In the perovskite material, the ratio of the mass of th...

Embodiment 3

[0055] This embodiment provides a phosphorus-doped LaCoO 3 (LaCoO 3 -P composite material) bifunctional catalyst, prepared by the following method.

[0056] Weigh 0.02mol of lanthanum oxide and 0.02mol of cobalt trioxide powder and mix them into the tungsten carbide ball milling jar. The mass ratio of the added tungsten carbide balls to the powder is 15:1. Under the condition of inert gas, seal the tungsten carbide ball milling jar. High-activity LaCoO was prepared by high-energy ball milling at 800 rpm for 4 h 3 Perovskite materials;

[0057] Then the LaCoO synthesized in the previous step 3 Add 0.005mol red phosphorus to the perovskite material, seal the tungsten carbide ball mill jar under the condition of inert gas, and preliminarily prepare phosphorus-doped LaCoO by high-energy ball milling at a speed of 400rpm for 3 hours 3 Perovskite materials;

[0058] Finally, phosphorus-doped LaCoO was preliminarily prepared 3 In the perovskite material, the ratio of the mass o...

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Abstract

The invention relates to a phosphorus-doped LaCoO 3 Bifunctional catalyst and its preparation method and application. The preparation method includes the following steps: S1: LaCoO 3 Perovskite materials mixed with red phosphorus, and phosphorus-doped LaCoO were obtained by high-energy ball milling under an inert atmosphere 3 Perovskite materials; S2: Phosphorus-doped LaCoO 3 Add a dispersant to the perovskite material, ball mill, and dry to obtain phosphorus-doped LaCoO 3 Bifunctional catalyst. The present invention selects the high-energy ball milling method, and utilizes phosphorus element doping to replace LaCoO 3 The oxygen element in the prepared phosphorus-doped LaCoO 3 The bifunctional catalyst has uniform phosphorus distribution, fine grains, large specific surface area, greatly improved catalytic activity in alkaline solution, excellent ORR and OER catalytic performance and high stability, and has great potential as a bifunctional catalyst in the field of electrocatalysis. Great application prospects.

Description

technical field [0001] The invention belongs to the field of perovskite materials and electrochemical catalysis, in particular to a phosphorus-doped LaCoO 3 Bifunctional catalyst and its preparation method and application. Background technique [0002] Perovskite oxide materials are materials with calcium titanate (CaTiO 3 ) same ABO 3 A large class of compounds with a structure in which the A site is an alkaline earth element and the B site is a transition metal element. Due to this unique crystal structure, perovskite oxide materials have many unique physical and chemical properties, such as light absorption, electrocatalysis, electrical conductivity, giant magnetoresistance, etc., attracting many researchers in the fields of materials, energy, and nanometers. Among them, La-Co-O-based perovskite materials have received extensive attention in the field of electrocatalysis due to their superior catalytic activity. LaCoO 3 It can be used as a catalyst in the oxygen evol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/185B01J35/02H01M4/90B01J35/00
CPCH01M4/9016B01J27/1853B01J35/33B01J35/50Y02E60/50
Inventor 沐杨昌施志聪陈远业王乃光刘钦豪
Owner GUANGDONG UNIV OF TECH