Porous carbon oxygen reduction catalyst and preparation method and application thereof

A catalyst and porous carbon technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of complicated preparation process and high cost of catalyst preparation, and achieve the effects of simple process, good electrocatalytic performance and cost reduction.

Active Publication Date: 2019-11-15
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to find an alternative catalyst and solve the problems of high preparation cost and cumbersome preparation process of existing catalysts, the present invention provides a preparation method of nano hollow spherical porous carbon-oxygen reduction catalyst with simple preparation process and low price

Method used

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  • Porous carbon oxygen reduction catalyst and preparation method and application thereof
  • Porous carbon oxygen reduction catalyst and preparation method and application thereof
  • Porous carbon oxygen reduction catalyst and preparation method and application thereof

Examples

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Embodiment 1

[0025] 1) Take 4 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer sample (molecular weight: 12600 g / mol), add 100 ml of deionized water, stir well, and obtain a clear and transparent solution.

[0026] 2) Add 1.6g of zinc chloride to the solution, and after clarification, add 1g of potassium hydroxide. After no more precipitation, move it into the reaction kettle, set the hydrothermal temperature to 80°C, keep it warm for 12h, then take it out, and dry it at 60°C for 24h to Transparent film-like substance.

[0027] 3) Carry out carbonization treatment of the transparent film-like substance in a tube furnace with nitrogen gas. The carbonization procedure is as follows: from room temperature to 500°C at a heating rate of 2°C / min, keep it warm for 3h, then cool to room temperature with the furnace, and take it out; First soak in 2mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation to neutrality, then ce...

Embodiment 2

[0029] 1) Take 4 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer sample (molecular weight: 12600 g / mol), add 100 ml of deionized water, stir well, and obtain a clear and transparent solution.

[0030] 2) Add 1.6g of zinc chloride to the solution, and after clarification, add 1g of potassium hydroxide. After no more precipitation, move it into the reaction kettle, set the hydrothermal temperature to 80°C, keep it warm for 12h, then take it out, and dry it at 60°C for 24h to Transparent film-like substance.

[0031] 3) Carbonize the transparent film-like substance in a tube furnace with nitrogen gas. The carbonization procedure is as follows: from room temperature to 700°C at a heating rate of 2°C / min, keep it warm for 3 hours, then cool to room temperature with the furnace, and take it out; First soak in 2mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation to neutrality, then centrifugally wash with ...

Embodiment 3

[0033] 1) Take 4 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer sample (molecular weight: 12600 g / mol), add 100 ml of deionized water, stir well, and obtain a clear and transparent solution.

[0034] 2) Add 1.6g of zinc chloride to the solution, and after clarification, add 1g of potassium hydroxide. After no more precipitation, move it into the reaction kettle, set the hydrothermal temperature to 80°C, keep it warm for 12h, then take it out, and dry it at 60°C for 24h to Transparent film-like substance.

[0035] 3) Carbonize the transparent film-like substance in a tube furnace filled with nitrogen. The carbonization procedure is as follows: from room temperature to 900°C at a heating rate of 2°C / min, keep it warm for 3 hours, then cool to room temperature with the furnace, and take it out; First soak in 2mol / L HCl solution, centrifuge with deionized water at 4000r / min for 5min, repeat centrifugation to neutrality, then centrifugally wash wi...

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Abstract

The invention relates to a porous carbon oxygen reduction catalyst and a preparation method and application thereof, which belong to the field of fuel cell catalyst materials. The preparation method of the porous carbon oxygen reduction catalyst includes the following steps: mixing zinc chloride with a polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (molecular weight:2900-14600g / mol); adding potassium hydroxide to obtain an intermediate product through hydrothermal reaction; drying the intermediate product to obtain a transparent film-like material; and carbonizing the transparent film-like material, and washing, drying and grinding the carbonizing product to obtain the porous carbon oxygen reduction catalyst. The preparation of the nano hollow spherical porous carbon material has the advantages of simple operation, short process, less equipment investment and good repeatability, and the difficulty in large-scale production can be easily solved.

Description

technical field [0001] The invention relates to a porous carbon-oxygen reduction catalyst and its preparation method and application, belonging to the field of fuel cell catalyst materials. Background technique [0002] Entering the 21st century, the rapid development of the global economy also has many hidden dangers, among which the shortage of fossil energy and environmental pollution are the two major aspects that attract the most attention. At present, there are various new energy sources, among which the fuel cell promoted by the state is one of the current hot spots. The main reasons are the high efficiency of fuel cells in energy conversion and the zero pollution of the products to the environment. However, fuel cells are still restricted by many factors, and their development has been relatively slow over the years. The core of this is the preparation of cathode catalysts, mainly because of the oxygen reduction (ORR) reaction that occurs at the cathode, and this re...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9083H01M4/88Y02E60/50
Inventor 黄乃宝邱忠瑜葛晓文
Owner DALIAN MARITIME UNIVERSITY
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