Universal method for preparing porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst

A dual-doping, catalyst technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of low F content and no universality, and achieve excellent resistance, enhanced electrochemical performance, and excellent carbon monoxide poisoning effect.

Inactive Publication Date: 2019-07-23
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is only one related patent (disclosure: CN109012729A) on porous nitrogen-fluorine double-doped carbon material as an oxygen reduction

Method used

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  • Universal method for preparing porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst
  • Universal method for preparing porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst
  • Universal method for preparing porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step S1: Fully mix 0.5g glucose (carbon precursor) and 0.1321g ammonium fluoride (nitrogen source and fluorine source) to obtain material A1;

[0040] Step S2: Transfer material A1 to a porcelain boat and place it in a tube furnace. Under the protection of inert nitrogen gas, raise the temperature from room temperature to 300°C for 60 minutes, keep at 300°C for 60 minutes, and then increase the temperature at a rate of 10°C / min. Raise the temperature to 500°C and keep it for 120 minutes, then naturally cool down to room temperature to obtain material B1;

[0041] Step S3: Transfer the material B1 to the mixed activator B* prepared in advance (a certain amount of ammonia water is dropped into an aqueous solution containing a certain amount of zinc chloride, and stirred evenly to obtain the mixed activator B*, wherein ammonia monohydrate and chloride The molar ratio of zinc is 1:1), soaked overnight and dried to obtain material C1;

[0042] Step S4: Transfer material C1 ...

Embodiment 2

[0045]Step S1: Fully mix 0.5g glucose (carbon precursor) and 0.2642g ammonium fluoride (nitrogen source and fluorine source) to obtain material A2;

[0046] Step S2: Transfer material A2 to a porcelain boat and place it in a tube furnace. Under the protection of inert gas nitrogen, heat up from room temperature to 300°C for 60 minutes, keep at 300°C for 60 minutes, and then increase the temperature at a rate of 10°C / min. Raise the temperature to 500°C and keep it for 120min, then naturally cool down to room temperature to obtain material B2;

[0047] Step S3: Transfer the material B2 to the mixed activator B* prepared in advance (a certain amount of ammonia water is dropped into an aqueous solution containing a certain amount of zinc chloride, and stirred evenly to obtain the mixed activator B*, wherein ammonia monohydrate and chloride The molar ratio of zinc is 1:1), soaked overnight and dried to obtain material C2;

[0048] Step S4: Transfer material C2 to a porcelain boat ...

Embodiment 3

[0051] Step S1: Fully mix 0.5g glucose (carbon precursor) and 0.3964g ammonium fluoride (nitrogen source and fluorine source) to obtain material A3;

[0052] Step S2: Transfer material A3 to a porcelain boat and place it in a tube furnace. Under the protection of inert gas nitrogen, heat up from room temperature to 300°C for 60 minutes, keep at 300°C for 60 minutes, and then increase the temperature at a rate of 10°C / min. Raise the temperature to 500°C and keep it for 120min, then naturally cool down to room temperature to obtain material B3;

[0053] Step S3: Transfer the material B3 to the mixed activator B* prepared in advance (a certain amount of ammonia water is dropped into an aqueous solution containing a certain amount of zinc chloride, and stirred evenly to obtain the mixed activator B*, wherein ammonia monohydrate and chloride The molar ratio of zinc is 1:1), soaked overnight and dried to obtain material C3;

[0054] Step S4: Transfer the material C3 to a porcelain ...

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Abstract

The invention discloses a universal method for preparing a porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst. The method comprises the following steps: uniformly mixing a carbon precursor, a fluorine source and a nitrogen source to obtain a material A; roasting the material A at a high temperature to obtain a material B; transferring the material B into a mixed activatingagent B*, soaking overnight and drying to obtain a material C; roasting the material C at a high temperature to obtain a material D; transferring the material D into a container, adding an acidic solution, soaking for 24 hours, washing with high-purity water until filtrate is neutral, and drying in a blast drying oven at 105 DEG C for 6 hours to obtain the target product porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst. The preparation method is low in cost, easy to operate and environmentally friendly, and the prepared porous nitrogen and fluorine double-doped carbon-oxygen reduction catalyst has excellent oxygen reduction catalytic performance and methanol interference and carbon monoxide poisoning resistance.

Description

technical field [0001] The invention belongs to the technical field of synthesis of heteroatom-doped carbon-oxygen reduction catalysts, and in particular relates to a universal method for preparing porous nitrogen-fluorine double-doped carbon-oxygen reduction catalysts. Background technique [0002] Currently, the oxygen reduction reaction, as one of the key reactions, is involved in many fields, such as energy storage and conversion, biology, and metal surface corrosion. As a new type of energy conversion device, the fuel cell's cathode oxygen reduction reaction is the bottleneck for the early realization of large-scale application of this energy technology. At present, commercial Pt / C is still recognized as the most active oxygen reduction electrocatalyst, but the price of platinum is high and the Pt / C catalyst is not strong against methanol interference and CO poisoning. Therefore, it is urgent to seek highly efficient, stable, highly selective and low-cost oxygen reduct...

Claims

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Application Information

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IPC IPC(8): H01M4/96
CPCH01M4/96Y02E60/50
Inventor 高书燕赵亚岭李聪杨英杰
Owner HENAN NORMAL UNIV
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