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Heteroatom-doped carbon-based non-noble metal compound electrocatalyst and preparation method thereof

A non-precious metal and compound electrotechnology, applied in the field of electrocatalysis, can solve the problems of many preparation steps, low degree of bonding, high cost of raw materials or equipment, etc., achieve high nitrogen doping, promote complete decomposition, and reduce stability.

Inactive Publication Date: 2019-04-09
SAIC MOTOR
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the existing method has many preparation steps, high cost of raw materials or equipment, low degree of bonding between precursor components (carbon source, nitrogen source, metal precursor), and limited degree of heteroatom doping.

Method used

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  • Heteroatom-doped carbon-based non-noble metal compound electrocatalyst and preparation method thereof
  • Heteroatom-doped carbon-based non-noble metal compound electrocatalyst and preparation method thereof
  • Heteroatom-doped carbon-based non-noble metal compound electrocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0068] Phosphor flake graphite is prepared by the Hummers oxidation method to obtain graphene oxide, and the graphene oxide aqueous solution is obtained by dialysis. Measure the graphene oxide aqueous solution containing 100 mg of graphene oxide and dilute to 100 mL with deionized water.

[0069] Sinter melamine at 550° C. in air atmosphere to obtain graphitic carbon nitride raw material, sonicate 100 mg of graphitic carbon nitride in hydrochloric acid (37%) for 3 hours, filter and wash to obtain acidified graphitic carbon nitride.

[0070] The above-mentioned acidified graphite phase carbon nitride and graphene oxide aqueous solution were mixed, ultrasonically treated for 0.5 hours, and 200mg Co(NO 3 ) 2 ·6H 2 O and stirred for 0.5 hours, added 10mL of ammonia water, stopped stirring, filtered, and washed to obtain a composite precursor: cobalt hydroxide / acidified graphite phase carbon nitride / graphene oxide. Finally, the composite precursor was treated in a nitrogen atmos...

Embodiment 2

[0074] Phosphor flake graphite is prepared by the Hummers oxidation method to obtain graphene oxide, and the graphene oxide aqueous solution is obtained by dialysis. Measure the graphene oxide aqueous solution containing 100 mg of graphene oxide and dilute to 100 mL with deionized water.

[0075] Dicyandiamide was sintered at 550°C in air atmosphere to obtain graphitic carbon nitride raw material, 100 mg of graphitic carbon nitride was ultrasonically treated in hydrochloric acid (37%) for 3 hours, filtered and washed to obtain acidified graphitic carbon nitride.

[0076] The above-mentioned acidified graphite phase carbon nitride and graphene oxide aqueous solution were mixed, ultrasonically treated for 0.5 hours, and 200mg Co(NO 3 ) 2 ·6H 2 O and stirred for 0.5 h, adding 500 mg Na 2 S·9H 2 O and continue to stir for 0.5 hours, filter and wash to obtain a composite precursor: cobalt sulfide / acidified graphite phase carbon nitride / graphene oxide. Finally, the composite pr...

Embodiment 3

[0080] 100 mg of carbon nanotubes were treated at 80° C. for 6 hours with a mixture of concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 1:3. The obtained modified carbon nanotubes (with oxygen-containing groups on the surface) were dispersed in 100 mL of deionized water.

[0081] Sinter urea at 550° C. in air atmosphere to obtain graphitic carbon nitride raw material, ultrasonically treat 50 mg of graphitic carbon nitride in hydrochloric acid (37%) for 3 hours, filter and wash to obtain acidified graphitic carbon nitride.

[0082] The above-mentioned acidified graphite phase carbon nitride and the aqueous solution of modified carbon nanotubes were mixed, ultrasonically treated for 0.5 hours, and 200mg Co(NO 3 ) 2 ·6H2 O and stirred for 0.5 h, adding 500 mg Na 2 S·9H 2 O and continue to stir for 0.5 hours, filter and wash to obtain the composite precursor: cobalt sulfide / acidified graphite phase carbon nitride / modified carbon nanotubes. Finally, ...

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Abstract

The invention provides a preparation method of a heteroatom-doped carbon-based non-noble metal compound electrocatalyst. The preparation method comprises the following steps of A) mixing a carbon precursor obtained by oxidization processing on a carbon raw material and acidulated graphite-phase carbon nitride in an aqueous solution, and then adding a transition metal salt and a precipitant to obtain a composite precursor; and B) performing thermal processing on the composite precursor to obtain the heteroatom-doped carbon-based non-noble metal compound electrocatalyst, wherein different-polarity charges are carried on a surface of the carbon precursor and a surface of the acidulated graphite-phase carbon nitride in the aqueous solution. By the method for processing the composite precursorby one step, effective control on types and content of heteroatom doping and types, morphology and dispersibility of metal compound constituents is simply and effectively achieved, very high mutual bonding force and synergic effect are achieved among the heteroatom-doped carbon-based non-noble metal compound composite material constituents, and excellent performance is shown when the heteroatom-doped carbon-based non-noble metal compound electrocatalyst is used as an electrocatalytic oxidization-reduction catalyst.

Description

technical field [0001] The invention relates to the technical field of electrocatalysis, in particular to a heteroatom-doped carbon-based non-noble metal compound electrocatalyst and a preparation method thereof. Background technique [0002] A fuel cell is a power generation device that directly converts chemical energy in fuel and oxidant into electrical energy. It has the advantages of high energy conversion efficiency, no pollution, and no noise. It is recognized as an efficient power generation technology. Among them, the metal-air battery is a kind of fuel cell in which "metal" fuel and oxygen in the air undergo a redox reaction to generate electricity. It has many advantages such as abundant raw materials, high energy density, safety and environmental protection. Proton exchange membrane fuel cells have the advantages of high specific power density, high specific energy, rapid startup at room temperature, no electrolyte loss, and long service life. Fuel cells have br...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCH01M4/9083Y02E60/50
Inventor 汤艳萍朱冠楠杨琨冯奇
Owner SAIC MOTOR
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