Method for preparing bifunctional catalyst from peanut hull

A bifunctional catalyst and peanut shell technology, which is applied in the field of electrocatalysis, can solve the problems of hindering the commercial application of hydrogen production by electrolysis, high price, and scarcity of substances, and achieve the effects of promoting electrocatalytic performance, low cost and convenient operation.

Inactive Publication Date: 2017-05-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to its high energy density, clean products and no carbon dioxide emissions, hydrogen has attracted more and more attention as a new type of clean energy in petrochemical industry. In the current preparation technology, hydrogen production by electrolysis of water has high conversion efficiency and simple process , The technology is mature, but because the catalyst precious metal ruthenium oxide or iridium oxide commonly used in the anode oxygen evolution reaction is expensive, the material is scarce, and the stability is poor, which hinders the commercial application of hydrogen production by electrolysis of water

Method used

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  • Method for preparing bifunctional catalyst from peanut hull
  • Method for preparing bifunctional catalyst from peanut hull
  • Method for preparing bifunctional catalyst from peanut hull

Examples

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Effect test

Embodiment 1

[0045] Example 1: A method for preparing a bifunctional electrocatalyst using biomass peanut shells as a raw material

[0046] 1) Peanut shells are ground and crushed with a grinder, 6g of peanut shells are weighed, dissolved in 80ml of water, ultrasonicated for 30 minutes, and stirred for 2 hours.

[0047] 2) Transfer the solution to a 100ml reaction kettle and heat at 150°C for 30 hours.

[0048] 3) Take out the carbon airgel in the reaction kettle, filter, wash with water several times, and dry. Take 1 g of filter cake and transfer it to a beaker, add 1 g of potassium hydroxide, 60 ml of water, 2 g of glucose, and 2 g of melamine, magnetically stir for 12 hours, dry, and record as powder 1.

[0049] 4) Put powder 1 into a tube furnace for carbonization, the temperature rises to 950°C (increase at a rate of 2°C per minute, keep at 200°C for 2 hours, and keep at 950°C for 2 hours), soak in 1M HCl 5ml for 12 hours, filter, Rinse with a large amount of water until PH=7, recor...

Embodiment 2

[0052] Example 2: A method for preparing a bifunctional electrocatalyst using biomass peanut shells as a raw material

[0053] 1) Peanut shells are ground and crushed with a grinder, 6g of peanut shells are weighed, dissolved in 80ml of water, ultrasonicated for 30 minutes, and stirred for 2 hours.

[0054] 2) Transfer the solution to a 100ml reaction kettle and heat at 150°C for 30 hours.

[0055] 3) Take out the carbon airgel in the reaction kettle, filter, wash with water several times, and dry. Take 1 g of filter cake and transfer it to a beaker, add 1 g of potassium hydroxide, 60 ml of water, 2 g of glucose, and 2 g of melamine, magnetically stir for 12 hours, dry, and record as powder 1.

[0056] 4) Put powder 1 into a tube furnace for carbonization, the temperature rises to 950°C (increase at a rate of 2°C per minute, keep at 200°C for 2 hours, and keep at 950°C for 2 hours), soak in 1M HCl 5ml for 12 hours, filter, Rinse with a large amount of water until PH=7, recor...

Embodiment 3

[0059] Example 3: A method for preparing a bifunctional electrocatalyst using biomass peanut shells as a raw material

[0060] 1) Peanut shells are ground and crushed with a grinder, 6g of peanut shells are weighed, dissolved in 80ml of water, ultrasonicated for 30 minutes, and stirred for 2 hours.

[0061] 2) Transfer the solution to a 100ml reaction kettle and heat at 150°C for 30 hours.

[0062] 3) Take out the carbon airgel in the reaction kettle, filter, wash with water several times, and dry. Take 1 g of filter cake and transfer it to a beaker, add 1 g of potassium hydroxide, 60 ml of water, 2 g of glucose, and 2 g of melamine, magnetically stir for 12 hours, dry, and record as powder 1.

[0063] 4) Put powder 1 into a tube furnace for carbonization, the temperature rises to 950°C (increase at a rate of 2°C per minute, keep at 200°C for 2 hours, and keep at 950°C for 2 hours), soak in 1M HCl 5ml for 12 hours, filter, Rinse with a large amount of water until PH=7, recor...

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Abstract

The invention discloses a method for preparing a bifunctional electro-catalyst from peanut hull, and belongs to the technical field of electro-catalysis. The method comprises the steps of adding an active agent, a carbon source and a nitrogen source into waste peanut hull biomass serving as a raw material to obtain exotic atom-doped porous carbon; adding a certain amount of metal doping agent, and performing secondary carbonization to obtain a metal and nitrogen co-doped porous carbon material, wherein the material has excellent oxygen reduction and oxygen evolution electro-catalysis performance. By adopting the cheap, readily available and environment-friendly peanut hull biomass as a raw material, the preparation process is innocuous and harmless. The bifunctional electro-catalyst can be applied to oxygen reduction and oxygen evolution.

Description

technical field [0001] The invention relates to a new method for preparing a bifunctional catalyst from peanut shells, and belongs to the technical field of electrocatalysis. Background technique [0002] Since entering the 21st century, energy depletion and environmental degradation are major problems that human beings have to face in the 21st century. Due to the burning of fossil fuels and global warming, the environmental quality of many cities in the world is declining day by day. Therefore, people have been trying to find and develop a green, environmentally friendly and sustainable alternative energy source. As a new type of energy, a fuel cell is a power generation device that directly converts chemical energy into electrical energy through electrochemical reactions. It has the advantages of high conversion efficiency, no pollution, low noise and high reliability, and has attracted widespread attention. [0003] The reaction rate of the cathode oxygen reduction (ORR...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M4/90
CPCH01M4/8825H01M4/9041H01M4/9083Y02E60/50
Inventor 曹达鹏杨柳
Owner BEIJING UNIV OF CHEM TECH
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