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A phosphorus doped porous carbon-oxygen reduction catalyst, preparation method and application thereof

A catalyst, porous carbon technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of limiting fuel cell reaction speed, slow kinetic control steps, high cost, etc., achieve good electrocatalytic performance, reduce catalyst cost, good repeatability

Active Publication Date: 2019-01-08
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen reduction reaction at the fuel cell cathode plays a key role in the fuel cell, and the reaction rate of the fuel cell is limited due to its slow kinetic control step
Although conventional Pt-based materials are the most practical and efficient electrocatalysts for the oxygen reduction reaction, they are hindered by high cost and susceptibility to poisoning in the industrialization of fuel cells

Method used

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  • A phosphorus doped porous carbon-oxygen reduction catalyst, preparation method and application thereof
  • A phosphorus doped porous carbon-oxygen reduction catalyst, preparation method and application thereof
  • A phosphorus doped porous carbon-oxygen reduction catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Take out and collect the white flocs on the inner surface of the pomelo peel, wash them with deionized water, dry them in a drying oven at 80°C for 24 hours, and then use a grinder to grind them into white powder.

[0030] 2) Take 2g grapefruit peel powder, add 1g NaH 2 PO 2 , add 35ml of deionized water, stir evenly to get a uniform pomelo peel powder solution.

[0031] 3) Move the uniform pomelo peel powder solution into the reaction kettle, set the hydrothermal temperature to 180°C, keep it warm for 6h, then take it out, and dry it at 80°C for 12h until it becomes a brown solid.

[0032] 4) Carbonize the brown solid in a tube furnace with nitrogen, the carbonization procedure is as follows: from room temperature to 800 °C at a heating rate of 10 °C / min, keep it warm for 1 h, then cool to room temperature with the furnace, and take it out; Soak in 3mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation until neutral, then...

Embodiment 2

[0034] 1) Take out and collect the white flocs on the inner surface of the pomelo peel, wash them with deionized water, dry them in a drying oven at 80°C for 24 hours, and then use a grinder to grind them into white powder.

[0035] 2) Take 2g grapefruit peel powder, add 2g NaH 2 PO 2 , add 35ml of deionized water, stir evenly to get a uniform pomelo peel powder solution.

[0036] 3) Move the uniform pomelo peel powder solution into the reaction kettle, set the hydrothermal temperature to 180°C, keep it warm for 6h, then take it out, and dry it at 80°C for 12h until it becomes a brown solid.

[0037] 4) Carbonize the brown solid in a tube furnace with nitrogen, the carbonization procedure is as follows: from room temperature to 800 °C at a heating rate of 10 °C / min, keep it warm for 1 h, then cool to room temperature with the furnace, and take it out; Soak in 3mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation until neutral, then...

Embodiment 3

[0039] 1) Take out and collect the white flocs on the inner surface of the pomelo peel, wash them with deionized water, dry them in a drying oven at 80°C for 24 hours, and then use a grinder to grind them into white powder.

[0040] 2) Take 2g grapefruit peel powder, add 3g NaH 2 PO 2 , add 35ml of deionized water, stir evenly to get a uniform pomelo peel powder solution.

[0041] 3) Move the uniform pomelo peel powder solution into the reaction kettle, set the hydrothermal temperature to 180°C, keep it warm for 6h, then take it out, and dry it at 80°C for 12h until it becomes a brown solid.

[0042] 4) Heat the brown solid in a tube furnace with nitrogen. The pyrolysis procedure is as follows: from room temperature to 800 °C at a heating rate of 10 °C / min, keep it warm for 1 h, then cool to room temperature with the furnace, and take it out; Soak in 3mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation until neutral, then centrifu...

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Abstract

The invention relates to a phosphorus-doped porous carbon-oxygen reduction catalyst, a preparation method and an application thereof, belonging to the field of fuel cell catalyst materials. A method for prepare a phosphorus-doped porous carbon-oxygen reduction catalyst comprise mixing NaH2PO2 and pomelo peel powder, hydrothermal reaction to obtain intermediate product, drying that intermediate product to obtain lumpy substance; A mass substance is carbonized unde that condition of nitrogen, and the obtained product is washed, dried and grin to obtain the product. The phosphorus doped three-dimensional porous carbon material prepared by the invention has the advantages of simple operation, less process flow, less equipment investment and good repeatability, and is convenient to solve the problem of large-scale production.

Description

technical field [0001] The invention relates to a phosphorus-doped porous carbon-oxygen reduction catalyst and its preparation method and application, belonging to the field of fuel cell catalyst materials. Background technique [0002] In recent years, energy shortage and environmental pollution are two major problems faced by human beings. It is urgent to find an alternative new energy source. As an energy conversion device, fuel cells have the advantages of high energy conversion rate and environmental friendliness. The oxygen reduction reaction at the fuel cell cathode plays a key role in the fuel cell due to its slow kinetic-controlled step that limits the reaction rate of the fuel cell. Although conventional Pt-based materials are the most practical and efficient electrocatalysts for oxygen reduction reactions, they are hindered by high cost and susceptibility to poisoning in the industrialization of fuel cells. Therefore, it is imperative to develop cheap, efficient,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90
CPCH01M4/90H01M4/9083Y02E60/50
Inventor 黄乃宝张媛媛
Owner DALIAN MARITIME UNIVERSITY
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