Natural plant based preparation method for low-cost high-efficiency catalyst for oxygen reduction reaction

A technology of natural plants and catalysts is applied in the field of preparation of low-cost and high-efficiency oxygen reduction reaction catalysts, which can solve problems such as complex preparation and achieve the effects of simple preparation, low cost and good catalytic performance.

Inactive Publication Date: 2013-01-16
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these catalysts have a relatively low cost compared with

Method used

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  • Natural plant based preparation method for low-cost high-efficiency catalyst for oxygen reduction reaction
  • Natural plant based preparation method for low-cost high-efficiency catalyst for oxygen reduction reaction
  • Natural plant based preparation method for low-cost high-efficiency catalyst for oxygen reduction reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention is achieved like this, and its preparation steps are as follows:

[0022] (1) Collect loofahs grown in nature and dry them;

[0023] (2) Put the dried loofah in a high-temperature furnace, and under the protection of nitrogen, heat it to 1000 oC at a heating rate of 5 oC / min, and stay for a certain period of time;

[0024] (3) Allow the electric furnace to cool naturally below 400 oC, and take out the carbonized material to obtain an oxygen reduction catalyst; the total content of nitrogen, phosphorus and sulfur in the carbonized loofah is greater than 1%.

Embodiment 2

[0026] The present invention is achieved like this, and its preparation steps are as follows:

[0027] (1) Collect loofahs grown in nature and dry them;

[0028] (2) Put the dried loofah in a high-temperature furnace, under the protection of nitrogen, heat it to 1100 oC at a heating rate of 5 oC / min, and stay for a certain period of time;

[0029] (3) Allow the electric furnace to cool naturally below 400 oC, and take out the carbonized material to obtain an oxygen reduction catalyst; the total content of nitrogen, phosphorus and sulfur in the carbonized loofah is greater than 1%.

Embodiment 3

[0031] The present invention is achieved like this, and its preparation steps are as follows:

[0032] (1) Collect loofahs grown in nature and dry them;

[0033] (2) Put the dried loofah in a high-temperature furnace, and under the protection of nitrogen, heat it to 1200 oC at a heating rate of 10 oC / min, and stay for a certain period of time;

[0034] (3) Allow the electric furnace to cool naturally below 400 oC, and take out the carbonized material to obtain an oxygen reduction catalyst; the total content of nitrogen, phosphorus and sulfur in the carbonized loofah is greater than 1%.

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Abstract

The invention discloses a natural plant based preparation method for a low-cost high-efficiency catalyst for oxygen reduction reaction. The method includes the steps: 1) collecting natural plants grew in the natural world and containing hybrid elements such as nitrogen, sulfur, phosphorus, boron or selenium and drying the plants; 2) placing the dried natural plants in a high-temperature furnace, heating to 800-1600 DEG C under the protection of nitrogen at the heating rate of 1-20 DEG C/minutes and keeping the temperature for a certain time; 3) enabling the electric furnace to be cooled naturally to below 400 DEG C, and taking carbonized materials out so that the catalyst for oxygen reduction is obtained. Catalysts of the type have the oxygen reduction catalytic performances equivalent to those of 20%wtPt/c and other catalysts based on carbon nanotubes, graphene and the like and are far lower in cost than those of similar catalysts. The catalyst can be widely applied to alkaline, neutral and acidic fuel cells.

Description

technical field [0001] The invention relates to a preparation method of an oxygen reduction reaction catalyst material, in particular to a preparation method of a low-cost and high-efficiency oxygen reduction reaction catalyst based on natural plants. Background technique [0002] The oxygen reduction reaction is the most common cathodic reaction in fuel cells, whereby oxygen is converted to water by combining electrons and protons through a four-electron process. [0003] [0004] Oxygen reduction catalyst is a crucial component of fuel cell cathode, and its performance directly depends on the performance of the final battery. Platinum (Pt) is the most commonly used catalyst for the oxygen reduction reaction. However, since the price of Pt is very expensive, it brings a very high cost to the battery. In recent years, scientists have developed a variety of novel high-efficiency oxygen reduction catalysts, such as transition metal sulfides, enzyme electrocatalytic system...

Claims

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Application Information

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IPC IPC(8): B01J27/24
Inventor 陈水亮侯豪情周龑
Owner JIANGXI NORMAL UNIV
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