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Boron-doped carbon material and its preparation method and use

A technology of boron doping and carbon materials, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of difficult control of process conditions in the preparation process, unfavorable catalyst industrialization, complex preparation methods, etc., and achieve excellent stability and methanol resistance performance, good ORR catalytic activity, and high degree of graphitization

Inactive Publication Date: 2018-05-25
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patents CN103613092A, CN103496689A, CN104084226A and other patents respectively report boron-doped graphene, boron-doped carbon nanotubes and boron-doped carbon as oxygen reduction electrocatalysts, all of which have good oxygen reduction catalytic activity, but all use boron sources and carbon source precursors, the method is cumbersome
[0004] In summary, most of the existing methods for preparing boron-doped carbon materials are relatively complicated, and the process conditions in the preparation process are not easy to control, which is not conducive to the industrialization of catalysts.

Method used

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  • Boron-doped carbon material and its preparation method and use
  • Boron-doped carbon material and its preparation method and use
  • Boron-doped carbon material and its preparation method and use

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] (1) Synthesis of PTPB: Dissolve 62.3g (0.2mol) triphenyltriboroxane (TPB) in 2000mL nitrobenzene, then add 91.3g (1.2mol) dimethoxymethane (molecular weight 76) and 289.7g (1.2mol) of anhydrous aluminum trichloride, stirred at 45°C for 5h, then raised to 80°C and stirred for 19h; after the reaction was completed, poured into 10L of methanol for settling, filtered, washed with water (1000mL×2), and dried for later use; The polymer was characterized by infrared spectroscopy, as figure 1 shown;

[0070] (2) 2.5g PTPB in N 2 Heat treatment at 900°C for 2 hours in the atmosphere to obtain 1.5 g of boron-doped carbon-nonmetal oxygen reduction catalyst, which is designated as B-C-900.

[0071] Catalyst performance test method (the following each embodiment obtains catalyst and the commercial Pt / C (JohnsonMatthey) that is used for comparison all tests with this method)

[0072] (1) Weigh 2mg of the catalyst, add it to 1mL Nafion-ethanol (1.5 / 98.5vol / vol) solution, ultrasonic...

Embodiment 2

[0077] (1) Synthesis of PTPB: Dissolve 62.3g (0.2mol) triphenylboroxane (TPB) in 2000mL dichloroethane, then add 91.3g (1.2mol) dimethoxymethane and 289.7g ( 1.2mol) of anhydrous aluminum trichloride, stirred at 45°C for 5h, then raised to 80°C and stirred for 19h; after the reaction was completed, poured into 10L methanol for sedimentation, filtered, washed with water (1000mL×2), and dried for later use; the obtained polymer was Infrared spectroscopy was characterized as figure 1 shown;

[0078] (2) 2.5g PTPB in N 2 Heat treatment at 800°C for 2 hours in the atmosphere to obtain 1.2 g of boron-doped carbon-nonmetal oxygen reduction catalyst, which is designated as B-C-800.

Embodiment 3

[0080] (1) Synthesis of PTPB: Dissolve 62.3g (0.2mol) triphenyltriboroxane (TPB) in 2000mL nitrobenzene, then add 88.9g (1.2mol) diethyl ether (molecular weight 74), 45.6 g (0.6mol) dimethoxymethane and 194.6g (1.2mol) anhydrous ferric trichloride, stirred at 45°C for 5h, then raised to 80°C and stirred for 19h; after the reaction was completed, pour it into 10L methanol for sedimentation, filter, Washed with water (1000mL × 2), dried for subsequent use; The resulting polymer was characterized by infrared spectroscopy, as figure 1 shown;

[0081] (2) 2.5g PTPB in N 2 Heat treatment at 1000°C for 2 hours in the atmosphere to obtain 1.1 g of boron-doped carbon-nonmetal oxygen reduction catalyst, which is designated as B-C-1000.

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Abstract

The invention provides a boron-doped carbon material, namely a boron-doped carbon nonmetallic oxygen reduction catalyst and a preparation method thereof, and belongs to the scientific and technical field of fuel batteries. The preparation method includes the following steps that firstly, polymer (PTPB) of triphenyl boroxine (TPB) is synthesized by the adoption of Friedel-Crafts reaction; secondly, the PTPB is subjected to thermal treatment, and the boron-doped carbon nonmetallic oxygen reduction catalyst is obtained. The nonmetallic oxygen reduction catalyst is low in cost, simple in preparation technology and high in activity and stability.

Description

technical field [0001] The present invention relates to a boron-doped carbon material, i.e. a boron-doped carbon non-metallic oxygen reduction catalyst, its preparation method and application, specifically, a boron-doped carbon non-metallic oxygen reduction catalyst and its preparation method, belonging to fuel Field of battery science and technology. Background technique [0002] With the high degree of industrialization of modern society, the increasingly serious problems of energy depletion and environmental pollution have become a worldwide problem that human beings must face. Actively looking for, researching and developing green and non-polluting alternative energy has become the primary prerequisite for sustainable development. Fuel cells (Fuel Cells, FCs) can directly convert chemical energy into electrical energy without the combustion process and are not limited by the Carnot cycle (Carnot cycle). They have high energy conversion efficiency and are environmentally ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/86H01M4/90H01M4/96
CPCH01M4/8605H01M4/90H01M4/96Y02E60/50
Inventor 黎华明阳梅陈红飙高勇杨端光
Owner XIANGTAN UNIV
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