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A nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application

A technology of nitrogen-doped porous carbon and nitrogen-doped carbon, which is applied in the field of materials science, can solve the problems of ORR electrocatalytic performance and stability that cannot meet the requirements, complicated preparation process, and high preparation cost, and achieve excellent ORR electrocatalytic performance and Stability, simple preparation method, effect of reducing preparation cost

Active Publication Date: 2020-11-27
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the preparation process of the current heteroatom-doped carbon-based materials is complicated, the preparation cost is high, and the ORR electrocatalytic performance and stability of the materials are still difficult to meet the demand.

Method used

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  • A nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application
  • A nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application
  • A nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of nitrogen-doped porous carbon ORR electrocatalyst, comprising the following steps:

[0038] In step (1), the potato precursor is boiled, ground into mashed potatoes, dried and set aside.

[0039] In step (2), the mashed potatoes dried in step (1) are transferred to a tube furnace, heated from room temperature to 900°C at a rate of 5°C / min under the protection of Ar atmosphere, and then carbonized for 2 hours to obtain nitrogen Doped carbon material (NC).

[0040] Step (3), weigh 1 gram of the carbon material obtained in step (2), add 50 ml of deionized water, stir to make it evenly dispersed; then add 3 grams of KOH, stir and dry at 80 ° C, the dried The dried intermediate was transferred to a crucible.

[0041] In step (4), the crucible in step (3) was placed in a tube furnace, under the protection of Ar atmosphere, heated from room temperature to 700°C at a rate of 3°C / min, and then activated for 1 hour.

[0042] In step (5), the activated pr...

Embodiment 2

[0044] A preparation method of nitrogen-doped porous carbon ORR electrocatalyst, comprising the following steps:

[0045] In step (1), the potato precursor is boiled, ground into mashed potatoes, dried and set aside.

[0046] In step (2), the mashed potatoes dried in step (1) are transferred to a tube furnace, heated from room temperature to 900°C at a rate of 5°C / min under the protection of Ar atmosphere, and then carbonized for 2 hours to obtain nitrogen Doped carbon material (NC).

[0047] Step (3), weigh 1 gram of the carbon material obtained in step (2), add 50 ml of deionized water, stir to make it evenly dispersed, then add 3 grams of KOH, stir and dry at 80 ° C, the dried The dried intermediate was transferred to a crucible.

[0048] In step (4), the crucible in step (3) was placed in a tube furnace, and under the protection of an Ar atmosphere, it was heated from room temperature to 750° C. at a rate of 3° C. / min, and then activated for 1 hour.

[0049]In step (5),...

Embodiment 3

[0051] A preparation method of nitrogen-doped porous carbon ORR electrocatalyst, comprising the following steps:

[0052] In step (1), the potato precursor is boiled, ground into mashed potatoes, dried and set aside.

[0053] In step (2), the mashed potatoes dried in step (1) are transferred to a tube furnace, heated from room temperature to 900°C at a rate of 5°C / min under the protection of Ar atmosphere, and then carbonized for 2 hours to obtain nitrogen Doped carbon material (NC).

[0054] Step (3), weigh 1 gram of the carbon material obtained in step (2), add 50 ml of deionized water, stir to make it evenly dispersed, then add 3 grams of KOH, stir and dry at 80 ° C, the dried The dried intermediate was transferred to a crucible.

[0055] In step (4), the crucible in step (3) was placed in a tube furnace, under the protection of Ar atmosphere, heated from room temperature to 800° C. at a rate of 3° C. / min, and then activated for 1 hour.

[0056] In step (5), the activate...

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Abstract

The invention relates to a nitrogen-doped porous carbon catalyst prepared from potatoes and preparation and application of the catalyst. A preparation method of the catalyst comprises the following steps: 1) pretreating potatoes so as to obtain a potato paste; 2) carrying out high-temperature carbonization on the potato paste so as to obtain a nitrogen-doped carbon material; 3) mixing the nitrogen-doped carbon material with an activator, and carrying out high-temperature calcining activation so as to obtain an activation product; 4) removing excessive activator, thereby obtaining the nitrogen-doped porous carbon catalyst. The catalyst can be used as a fuel battery cathode catalyst for catalyzing oxygen reduction reactions. Compared with the prior art, the preparation method provided by theinvention is simple to operate, low in cost and convenient in large-scale industrial production; the prepared catalyst is of a multi-stage pore structure, has a high specific surface area and porosity, has an adjustable nitrogen element content and excellent ORR (Oxygen Reduction Reaction) electro-catalytic properties.

Description

technical field [0001] The invention belongs to the technical field of materials science, and relates to a nitrogen-doped porous carbon catalyst prepared from potatoes and its preparation and application. Background technique [0002] As an efficient and environmentally friendly energy conversion device, fuel cells have broad application prospects in household electricity and vehicle power, and are an important part of the future sustainable energy development system. The oxygen reduction reaction (Oxygen Reduction Reaction, ORR) at the fuel cell cathode is a key step that determines the overall performance of the fuel cell due to its very slow kinetics. Currently, Pt-based catalysts are still the most dominant ORR catalysts due to their high catalytic activity. However, the commercialization of precious metal Pt is severely limited due to the scarcity of resources, high price, low stability, and susceptibility to cross-reaction of fuels (such as methanol, etc.). In recent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/88H01M4/90H01M4/96
CPCH01M4/8825H01M4/90H01M4/96Y02E60/50
Inventor 朱钰方何王涛
Owner UNIV OF SHANGHAI FOR SCI & TECH
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