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a co 2 Preparation method of p/npc electrocatalyst

An electrocatalyst, 2·6H2O technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of high OER overpotential, low electron transfer efficiency, poor dual functionality, etc., achieve good stability and improve oxygen reduction performance , High electrocatalytic activity

Active Publication Date: 2022-04-08
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the difficulty in making N-C and Co 2 Efficient complexation of P, while achieving ORR / OER bifunctional activity, in the presence of ORR4e - Problems with low electron transfer efficiency and high OER overpotential, thus poor bifunctionality

Method used

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  • a co <sub>2</sub> Preparation method of p/npc electrocatalyst
  • a co <sub>2</sub> Preparation method of p/npc electrocatalyst
  • a co <sub>2</sub> Preparation method of p/npc electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Put 0.1gC 14 H 14 N 3 SO 3 Na was added to 120 mL of ultrapure water, and added in an ice-water bath with stirring.

[0019] Add 0.48g FeCl 3 ·6H 2 O, add 0.2mL C 4 H 5 N; then add 57.3mg (NPC1 2 ) 3 , and kept stirring for 24h in the dark under normal temperature conditions, and the precursor polypyrrole was obtained through suction filtration, washing and drying;

[0020] (2) Put 60 mg of polypyrrole in 0.29 g of Co(NO 3 ) 2 ·6H 2 O ultrapure aqueous solution (10ml)

[0021] Ultrasonic for 20min, let stand for 12h, centrifuge, wash and dry; 4 H 6 N 2 The ultrapure aqueous solution (10ml) was left standing for 12h, centrifuged, washed and dried. The obtained sample was placed in the center of the tube furnace through 900 oC Pyrolysis at high temperature for 1h to obtain Co 2 P / NPC electrocatalysts. In this step, the annealing atmosphere is high-purity Ar, and the heating rate of the tube furnace is 10 o C / min.

[0022] figure 1 Co prepared und...

Embodiment 2

[0025] (1) Put 0.1gC 14 H 14 N 3 SO 3 Na was added to 120mL ultrapure water, and 0.48g FeCl was added in an ice-water bath stirred environment 3 ·6H 2 O, add 0.2mL C 4 H 5 N; then add 57.3mg (NPC1 2 ) 3, and kept stirring for 24h in the dark under normal temperature conditions, and the precursor polypyrrole was obtained through suction filtration, washing and drying;

[0026] (2) Put 60 mg of polypyrrole in 0.29 g of Co(NO 3 ) 2 ·6H 2 O ultrapure aqueous solution (10ml) was sonicated for 20min, left standing for 5h, centrifuged, washed and dried; the obtained sample was placed in a solution containing 0.082g C 4 H 6 N 2 The ultrapure aqueous solution (10ml) was left standing for 5h, centrifuged, washed and dried. The obtained sample was placed in the center of the tube furnace through 900 oC Pyrolysis at high temperature for 1h to obtain Co 2 P / NPC electrocatalysts. In this step, the annealing atmosphere is high-purity Ar, and the heating rate of the tube furn...

Embodiment 3

[0029] (1) Put 0.1g C 14 H 14 N 3 SO 3 Na was added to 120mL ultrapure water, and 0.48g FeCl was added in an ice-water bath stirred environment 3 ·6H 2 O, add 0.2mL C 4 H 5 N; then add 57.3mg (NPC1 2 ) 3 , and kept stirring for 24h in the dark under normal temperature conditions. After suction filtration, washing and drying, the precursor polypyrrole was obtained; 60mg of polypyrrole was placed in 0.29g of Co(NO) 3 ) 2 ·6H 2 O ultrapure aqueous solution (10ml) was sonicated for 20min, left standing for 2h, centrifuged, washed and dried; the obtained sample was placed in a solution containing 0.082g C 4 H 6 N 2 The ultrapure aqueous solution (10ml) was left standing for 2h, centrifuged, washed and dried. The obtained sample was placed in the center of the tube furnace through 900 oC Pyrolysis at high temperature for 1h to obtain Co 2 P / NPC electrocatalysts. In this step, the annealing atmosphere is high-purity Ar, and the heating rate of the tube furnace is 10 ...

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Abstract

The invention provides a Co 2 Preparation method of P / NPC electrocatalyst. Methyl orange was added to ultrapure water, and ferric chloride hexahydrate (FeCl 3 ·6H 2 O), followed by addition of pyrrole (C 4 h 5 N) and hexachlorotripolyphosphazene (NPCl 2 ) 3 , continuously stirred for 24 hours in the dark, filtered, washed and dried to obtain the precursor polypyrrole. Polypyrrole was placed in a solution containing cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) ultrapure water ultrasonication, static; then after centrifugation, drying, the obtained sample was placed in dimethylimidazole (C 4 h 6 N 2 ) in ultrapure water, centrifuged, washed and dried. Then the sample was calcined in a tube furnace at high temperature in an inert atmosphere to obtain a Co 2 P / NPC electrocatalyst, which has excellent electrocatalytic activity for oxygen reduction / evolution at the same time.

Description

technical field [0001] The present invention relates to a Co 2 The preparation method of P / NPC electrocatalyst belongs to the application field of oxygen reduction / precipitation. Background technique [0002] Electrocatalysis plays a central role in clean energy conversion technologies (fuel cells and metal-air batteries), and oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are key processes in these technologies. Since both reactions are four-electron transfer processes, the slow kinetics severely limit the energy conversion efficiency. Therefore, the development of cost-effective oxygen electrode catalysts is urgently needed. Precious metals Pt / C, RuO 2 and IrO 2 They are currently recognized as high-performance oxygen electrocatalysts, but their high cost, low reserves, and poor durability severely limit their large-scale commercial applications. In addition, Pt / C has excellent ORR performance but poor OER performance, while RuO 2 and IrO 2 Has e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 孙盼盼张丹左壮田良愉孙小华黄妞
Owner CHINA THREE GORGES UNIV
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