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A high density fe-n 4 Preparation method and application of active site oxygen reduction electrocatalyst

A technology of active sites and electrocatalysts, applied in the field of preparation of high-density Fe-N4 active site oxygen reduction electrocatalysts, can solve the problems that the catalytic activity of electrocatalysts cannot meet the activity requirements of PEMFCs, and it is difficult to apply proton exchange membrane fuel cells. , to achieve the effect of improving oxygen reduction catalytic activity, excellent oxygen reduction activity, and electrical conductivity

Active Publication Date: 2022-04-08
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the activity and durability of metallomacrocyclic compounds are greatly improved by combining with MOFs structure, the catalytic activity of electrocatalysts prepared by this method still cannot meet the activity requirements of PEMFCs, and it is difficult to apply to proton exchange membrane fuel cells.

Method used

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  • A high density fe-n <sub>4</sub> Preparation method and application of active site oxygen reduction electrocatalyst
  • A high density fe-n <sub>4</sub> Preparation method and application of active site oxygen reduction electrocatalyst
  • A high density fe-n <sub>4</sub> Preparation method and application of active site oxygen reduction electrocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] 40mg ZrOCl 2 ·8H 2 O was dispersed in 8 mL of DMF solution, 650 mg benzoic acid, 20 mg Heme, 30 mg meso-tetrakis (4-carboxyphenyl) porphine (TCPP), 10 mg meso-tetrakis (4-carboxyphenyl) porphine iron chloride (Fe -TCPP), ultrasonication at 25°C for 30min, reaction at 120°C for 12h, suction filtration, washing until the filtrate was colorless, and drying at 65°C to obtain the precursor of the electrocatalyst, denoted as 20-Heme@Fe 10 -PCN-222, then the precursor was heated at a rate of 5°C / min to 700°C and then kept at a constant temperature for 2 hours, and finally a black powder solid was obtained, denoted as 20-Heme@Fe 10 -PCN-222-700.

[0031] Such as figure 1 , the prepared electrocatalyst precursor 20-Heme@Fe obtained in Example 1 10 - PCN-222 is rod-shaped and uniform in size, and is consistent with the initial PCN-222 morphology of the electrocatalyst precursor obtained in Example 2, but its size is reduced.

[0032] Such as figure 2 , the XRD diffraction ...

Embodiment 2

[0038] 40mg ZrOCl 2 ·8H 2 O was dispersed in 8 mL of DMF solution, added 650 mg benzoic acid, 10 mg Heme, 40 mg TCPP, ultrasonicated at 25 °C for 30 min, reacted at 120 °C for 12 h, filtered with suction, washed until the filtrate was colorless, and dried at 65 °C to obtain an electrocatalyst 10-Heme@PCN-222, and then the precursor was heated at a rate of 5°C / min to 700°C and then kept at a constant temperature for 2 hours to obtain a black powder solid, which was named 10-Heme@PCN-222-700.

Embodiment 3

[0040] 40mg ZrOCl 2 ·8H 2 O was dispersed in 8 mL of DMF solution, added 650 mg benzoic acid, 20 mg Heme, 40 mg TCPP, ultrasonicated at 25 °C for 30 min, reacted at 120 °C for 12 h, filtered with suction, washed until the filtrate was colorless, and dried at 65 °C to obtain an electrocatalyst 20-Heme@PCN-222, and then the precursor was heated at a rate of 5°C / min to 700°C and then kept at a constant temperature for 2 hours to obtain a black powder solid, which was named 20-Heme@PCN-222-700.

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Abstract

The present invention provides a high-density Fe-N 4 The invention discloses a preparation method and application of an active site oxygen reduction electrocatalyst, belonging to the field of polymer electrolyte membrane fuel cell catalysts. The metal zirconium salt is evenly dispersed in the solvent, wherein, Zr in the zirconium salt 4+ The concentration in the solvent is 2-8mg / ml, add two kinds of macrocyclic compounds including macrocyclic compound Ⅰ, metal macrocyclic compound Ⅱ and organic acid, under the condition of 20-40℃, ultrasonic treatment for 10-30min, at 120℃ React for 8-12 hours, filter with suction, wash until the filtrate is colorless, dry, and pyrolyze at 600-900°C for 1-2 hours to obtain high-density Fe-N 4 Active-site oxygen reduction electrocatalysts. The invention is simple to operate, easy to control, and environmentally friendly, and the prepared high-density Fe-N 4 Active-site oxygen-reducing electrocatalysts with excellent oxygen-reduction activity can be used in polymer electrolyte membrane fuel cells.

Description

technical field [0001] The invention relates to the field of cathode oxygen reduction electrocatalysts for polymer electrolyte membrane fuel cells, in particular to a high-density Fe-N 4 Preparation method and application of active site oxygen reduction electrocatalyst. Background technique [0002] Since the development of modern industrialization, the massive and irrational use of non-renewable fossil fuels such as coal, oil, and natural gas has led to global nitrogen, sulfur, and carbon (NO x , SO x , CO) and other harmful gases have increased sharply, which has triggered a series of global concerns such as global temperature rise, environmental degradation, human health and global energy crisis. Therefore, it is imminent to develop energy technologies that are environmentally friendly, sustainable, safe and efficient. Polymer electrolyte membrane fuel cells (PEMFCs) have the advantages of high energy conversion efficiency, environmental friendliness, rapid start-up at...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90H01M8/10
CPCH01M4/90H01M2008/1095Y02E60/50
Inventor 宋玉江张云龙
Owner DALIAN UNIV OF TECH
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