Graphitized carbon carrier for hydrogen fuel cell, preparation method of graphitized carbon carrier and cell catalyst of graphitized carbon carrier

A graphitized carbon and fuel cell technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problem of limited improvement in the electrochemical corrosion resistance of carbon carriers, uneven distribution of metal particles, and the degree of graphitization on the surface of catalytic graphitized carbon carriers. Inhomogeneous and other problems, to achieve the effect of improving the resistance to electrochemical corrosion, good uniformity of the degree of graphitization, and stable catalytic effect

Active Publication Date: 2021-10-15
SINOCAT ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the transition metal particles will migrate and agglomerate into large particles during the heating process, this will lead to uneven distribution of metal particles on the surface of the carbon support, which will eventually lead to the problem of uneven graphitization on the surface of the catalytic graphitization carbon support. The improvement of electrochemical corrosion ability is limited

Method used

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  • Graphitized carbon carrier for hydrogen fuel cell, preparation method of graphitized carbon carrier and cell catalyst of graphitized carbon carrier
  • Graphitized carbon carrier for hydrogen fuel cell, preparation method of graphitized carbon carrier and cell catalyst of graphitized carbon carrier
  • Graphitized carbon carrier for hydrogen fuel cell, preparation method of graphitized carbon carrier and cell catalyst of graphitized carbon carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 1. Put 2g of original carbon carrier into the crusher, shear and crush for 10 minutes for later use;

[0073] 2. Take 1g of the sample in step 1, 5g of auxiliary agent aniline, 4g of cobalt nitrate and 200g of isopropanol and ultrasonically stir and mix for 1 hour, then reflux at 80°C for 5 hours;

[0074] 3. The product in step 2 was subjected to rotary evaporation to remove the solvent, and the rotary evaporation temperature was 60°C;

[0075] 4. Place the transition metal salt / carbon carrier mixture in step 3 in a tube furnace, blow nitrogen into it for 15 minutes, then heat it up to 300°C at a rate of 1°C / min and keep it warm for 30 minutes, then The heating rate was 5°C / min and the temperature was raised to 900°C for 3 hours. After cooling to room temperature, the pristine graphitized carbon support / transition metal mixture can be obtained

[0076] 5. Mix the original graphitized carbon support / transition metal mixture obtained in step 4 with a 1M sulfuric acid w...

Embodiment 2

[0083] 1. Put 2g of original carbon carrier into the crusher, shear and crush for 10 minutes for later use;

[0084] 2. Take 1g of the sample in step 1, 4g of cobalt nitrate and 200g of isopropanol and ultrasonically stir and mix for 1 hour, then reflux at 80°C for 5 hours;

[0085] 3. The product in step 2 was subjected to rotary evaporation to remove the solvent, and the rotary evaporation temperature was 60°C;

[0086] 4. Place the transition metal salt / carbon carrier mixture in step 3 in a tube furnace, blow nitrogen into it for 15 minutes, then heat it up to 300°C at a rate of 1°C / min and keep it warm for 30 minutes, then The heating rate was 5°C / min and the temperature was raised to 900°C for 3 hours. After cooling to room temperature, the pristine graphitized carbon support / transition metal mixture can be obtained

[0087] 5. Mix the original graphitized carbon support / transition metal mixture obtained in step 4 with a 1M sulfuric acid washing solution, and then pickl...

Embodiment 3

[0093] 1. Put 2g of original carbon carrier into the crusher, shear and crush for 10 minutes for later use;

[0094] 2. Take 1g of the sample in step 1 and 200g of isopropanol and mix it ultrasonically for 1 hour, then reflux at 80°C for 5 hours;

[0095] 3. The product in step 2 was subjected to rotary evaporation to remove the solvent, and the rotary evaporation temperature was 60°C;

[0096] 4. Put the carbon carrier mixture in step 3 in a tube furnace, blow it with nitrogen for 15 minutes, then raise the temperature at a rate of 1 °C / min to 300 °C and keep it warm for 30 minutes, then at a rate of 5 °C Heat up to 900°C per minute and keep warm for 3 hours. After cooling to room temperature, the original graphitized carbon support can be obtained.

[0097] 5. Mix the original graphitized carbon carrier obtained in step 4 with a washing solution of 1M sulfuric acid, and then pickle at 85° C. for 4 hours. Then the acid-washed sample was washed with deionized water to neutr...

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Abstract

The invention discloses a graphitized carbon carrier for a hydrogen fuel cell, a preparation method of the graphitized carbon carrier and a cell catalyst of the graphitized carbon carrier. The preparation method comprises the following steps: pretreating the carbon carrier; dispersing and anchoring transition metal ions, adding transition metal salt, auxiliaries and the like in the process, and performing ultrasonic stirring; carrying out catalytic graphitization on the carbon carrier, and keeping the temperature between 700 DEG C and 1000 DEG C; and catalytically purifying the graphitized carbon carrier. According to the graphitized carbon carrier for the hydrogen fuel cell, the auxiliaries are added in the preparation process of the carbon carrier, metal ions are assisted to be more uniformly dispersed on the surface of the carbon carrier, the uniformity of the catalytic graphitization degree of the surface of the carbon carrier is further improved, the electrochemical corrosion resistance of the carbon carrier is improved, and the durability of a catalyst is enhanced; and the auxiliary agent is converted into a carbon-containing substance in the heating process and serves as a physical barrier to hinder agglomeration and growth of metal particles. According to the carbon carrier, the graphitization temperature of a carbon material is remarkably reduced, the technical index of high-temperature roasting equipment is reduced, and the uniformity of the graphitization degree of the surface of the catalytic graphitization carbon carrier is better.

Description

technical field [0001] The invention belongs to the technical field of design and preparation of battery catalysts, in particular to the technical field of graphitized carbon carriers for battery catalyst cells, relates to new energy materials and the application field in fuel cell vehicles, and specifically relates to a graphitized carbon carrier for hydrogen fuel cells, and its preparation Method and battery catalyst thereof. Background technique [0002] As a green and pollution-free ultimate energy supply system, hydrogen fuel cells have attracted much attention, and have great application prospects in the field of vehicle fuel cells. As the most important component of hydrogen fuel cells, catalysts have attracted much attention for their stability. The stability of the catalyst mainly includes the stability of the platinum-based active particles and the stability of the carbon support. Carbon supports will undergo electrochemical corrosion under strong acidity and hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCH01M4/926H01M4/8825Y02E60/50
Inventor 王正罗唐琪雯付欣怡陈启章
Owner SINOCAT ENVIRONMENTAL TECH
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