A F127-induced three-dimensional porous feni-nc bifunctional electrocatalyst and its preparation method

A F127, three-dimensional porous technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost, difficult industrialization, complicated preparation methods, etc., and achieve low toxicity, low price, The effect of preparation process safety

Inactive Publication Date: 2022-01-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhao et al [Adv.Mater.Interfaces,2018,5(9):1701448] loaded FeNi alloy nanowire arrays on carbon cloth by chemical vapor deposition. Electrochemical tests showed that it has good ORR and OER performance. But the preparation method is complicated, the cost is high, and it is not easy to be industrialized

Method used

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  • A F127-induced three-dimensional porous feni-nc bifunctional electrocatalyst and its preparation method
  • A F127-induced three-dimensional porous feni-nc bifunctional electrocatalyst and its preparation method
  • A F127-induced three-dimensional porous feni-nc bifunctional electrocatalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Fe 1 Ni 1 -NC 4 -F127 3 -800-2 (Fe 1 Ni 1 Refers to the addition of Fe(NO 3 ) 3 9H 2 O and NiCl 2 ·6H 2 The molar ratio of O is 1:1, NC 4 Indicates gC produced by calcination of melamine 3 N 4 , F127 3 Indicates that F127 was added during the preparation process, NC 4 -F127 3 Refers to the addition of gC during the preparation process 3 N 4 The mass ratio to F127 is 4:3, 800-2 means the pyrolysis temperature is 800°C, and the pyrolysis time is 2h)

[0043] Weigh 8g of melamine and grind it evenly, place it in a tube furnace, and put it under N 2 Under atmosphere at 5°C min -1 The temperature was programmed to rise to 550°C, and the constant temperature was reacted for 4 hours, and gC was obtained after natural cooling. 3 N 4 sample. Dissolve 300mg F127 in 20mL deionized water, add 400mg gC 3 N 4 , ultrasonically disperse for 1h, add 60.6mg Fe(NO 3 ) 3 9H 2 O and 35.6 mg NiCl 2 ·6H 2 O, stirred at 80°C for 10h, and dried at 80°C for...

Embodiment 2

[0044] Example 2: Fe 1 Ni 1 -NC 4 -F127 3 -700-2 (Fe 1 Ni 1 Refers to the addition of Fe(NO 3 ) 3 9H 2 O and NiCl 2 ·6H 2 The molar ratio of O is 1:1, NC 4 Indicates gC produced by calcination of melamine 3 N 4 , F127 3 Indicates that F127 was added during the preparation process, NC 4 -F127 3 Refers to the addition of gC during the preparation process 3 N 4 The mass ratio to F127 is 4:3, 700-2 means the pyrolysis temperature is 700°C, and the pyrolysis time is 2h)

[0045] Weigh 8g of melamine and grind it evenly, place it in a tube furnace, and put it under N 2 Under atmosphere at 5°C min -1 The temperature was programmed to rise to 550°C, and the constant temperature was reacted for 4 hours, and gC was obtained after natural cooling. 3 N 4 sample. Dissolve 300mg F127 in 20mL deionized water, add 400mg gC 3 N 4 , ultrasonically disperse for 1h, add 60.6mg Fe(NO 3 ) 3 9H 2 O and 35.6 mg NiCl 2 ·6H 2 O, stirred at 80°C for 10h, and dried at 80°C for...

Embodiment 3

[0046] Example 3: Fe 1 Ni 1 -NC 4 -F127 3 -900-2 (Fe 1 Ni 1Refers to the addition of Fe(NO 3 ) 3 9H 2 O and NiCl 2 ·6H 2 The molar ratio of O is 1:1, NC 4 Indicates gC produced by calcination of melamine 3 N 4 , F127 3 Indicates that F127 was added during the preparation process, NC 4 -F127 3 Refers to the addition of gC during the preparation process 3 N 4 The mass ratio to F127 is 4:3, 900-2 means the pyrolysis temperature is 900°C, and the pyrolysis time is 2h)

[0047] Weigh 8g of melamine and grind it evenly, place it in a tube furnace, and put it under N 2 Under atmosphere at 5°C min -1 The temperature was programmed to rise to 550°C, and the constant temperature was reacted for 4 hours, and gC was obtained after natural cooling. 3 N 4 sample. Dissolve 300mg F127 in 20mL deionized water, add 400mg gC 3 N 4 , ultrasonically disperse for 1h, add 60.6mg Fe(NO 3 ) 3 9H 2 O and 35.6 mg NiCl 2 ·6H 2 O, stirred at 80°C for 10h, and dried at 80°C for ...

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Abstract

A F127-induced three-dimensional porous FeNi-NC bifunctional electrocatalyst and a preparation method thereof belong to the field of energy and electrocatalysis. gC was first prepared by pyrolysis 3 N 4 As a source of C and N, F127 is used as a pore-forming agent and a surfactant to control the morphology of the catalyst, thereby preparing a three-dimensional porous structure FeNi-NC catalyst with a large specific surface area and uniform distribution of active nanoparticles. The catalyst uses F127 as a surfactant and a pore-forming agent to form a graphite carbon layer covering a core-shell structure of FeNi alloy, wherein the FeNi alloy nanoparticles are uniform in size, and the particle diameters are mainly in the range of 9-12nm. The catalyst raw materials provided by the present invention are low in cost and rich in sources, and the preparation process is simple. The rich mesopore structure provided by calcined F127 can meet the mass transfer requirements of the catalyst, and gC 3 N 4 The in-situ calcination can form a core-shell structure to prevent metal particles from agglomerating and provide abundant N‑C active sites, with high catalytic activity and stability, which is conducive to large-scale production.

Description

technical field [0001] The invention belongs to the field of energy and electrocatalysis, and relates to a dual-function electrocatalyst applied to oxygen reduction reaction and oxygen evolution reaction, in particular to a three-dimensional porous material FeNi-NC electrocatalyst and a preparation method thereof. Background technique [0002] The exacerbation of fossil energy crisis, environmental degradation and climate warming has prompted a global upsurge in the research and development of green and sustainable energy conversion and utilization devices such as fuel cells, rechargeable metal-air batteries, and electrolyzed water. At present, in order to achieve commercialization and large-scale application of these new devices, there are still some key fundamental problems, mainly the oxygen reduction reaction (oxygen reduction reaction, ORR) that occurs during the discharge process of the oxygen electrode and the oxygen evolution reaction that occurs during the charging p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/00B01J35/10B01J37/00H01M4/90
CPCB01J37/0018B01J35/1061B01J35/1019B01J35/0033B01J35/006B01J27/24H01M4/9075Y02E60/50
Inventor 李光兰徐晓存杨贝贝曹硕
Owner DALIAN UNIV OF TECH
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