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Preparation method of carbonized wood loaded PdCo alloy composite electrocatalyst

An electrocatalyst and carbonized wood technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve the problems of limited usability and sustainability, increase the electrochemical active area, facilitate penetration and diffusion, increase The effect of specific surface area

Active Publication Date: 2020-03-17
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the carbon materials currently used in carbon-supported catalysts are basically prepared from non-renewable fossil resources under relatively harsh conditions, such as chemical vapor deposition and laser etching. The convenience and sustainability of carbon materials still very limited

Method used

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  • Preparation method of carbonized wood loaded PdCo alloy composite electrocatalyst
  • Preparation method of carbonized wood loaded PdCo alloy composite electrocatalyst
  • Preparation method of carbonized wood loaded PdCo alloy composite electrocatalyst

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Effect test

Embodiment 1

[0033] The preparation method of carbonized wood supported PdCo alloy composite electrocatalyst of the present invention, concrete method is as follows:

[0034] (1) Cut basswood horizontally into wood chips with a length and width of 2×0.5cm and a thickness of 0.1cm, wash the wood chips, and then soak the wood chips in 0.3mol / L zinc chloride solution at 30°C for 24 hours, take them out Dry in an oven at 80°C for 12 hours;

[0035] (2) Put the dried wood chips in a tube furnace, under the protection of nitrogen atmosphere, first raise the temperature to 500°C at a heating rate of 5°C / min, keep it warm for 1h, and then raise the temperature at a heating rate of 5°C / min To 900°C, keep warm for 3 hours, and finally cool naturally to room temperature under the protection of nitrogen to obtain three-dimensional porous carbonized wood derived from wood;

[0036] (3) With the carbonized wood prepared in step (2) as the working electrode, a spectrally pure graphite rod with a diamete...

Embodiment 2

[0043] The preparation method of carbonized wood supported PdCo alloy composite electrocatalyst of the present invention, concrete method is as follows:

[0044] (1) Cut basswood horizontally into wood chips with a length and width of 2.5×1.0cm and a thickness of 0.2cm, wash the wood chips, and then soak the wood chips in 0.2mol / L zinc chloride solution at 25°C for 24 hours, take them out Dry in an oven at 60°C for 24 hours;

[0045] (2) Put the dried wood chips in a tube furnace, under the protection of nitrogen atmosphere, first raise the temperature to 400°C at a heating rate of 3°C / min, keep it warm for 1.5h, and then heat it at a heating rate of 3°C / min Raise the temperature to 800°C, keep it warm for 4 hours, and finally cool it down to room temperature naturally under the protection of nitrogen to obtain a three-dimensional porous carbonized wood derived from wood;

[0046] (3) With the carbonized wood prepared in step (2) as the working electrode, a spectrally pure gr...

Embodiment 3

[0049] The preparation method of carbonized wood supported PdCo alloy composite electrocatalyst of the present invention, concrete method is as follows:

[0050] (1) Cut basswood horizontally into wood chips with a length and width of 2.0×1.0cm and a thickness of 0.3cm, wash the wood chips, and then soak the wood chips in 0.4mol / L zinc chloride solution at 30°C for 12 hours, take them out Dry in an oven at 70°C for 18 hours;

[0051] (2) Put the dried wood chips in a tube furnace, under the protection of nitrogen atmosphere, first raise the temperature to 300°C at a heating rate of 4°C / min, keep it warm for 2h, and then raise the temperature at a heating rate of 4°C / min to 700°C, keep warm for 5 hours, and finally cool naturally to room temperature under the protection of nitrogen to obtain three-dimensional porous carbonized wood derived from wood;

[0052] (3) With the carbonized wood prepared in step (2) as the working electrode, a spectrally pure graphite rod with a diame...

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Abstract

The invention discloses a preparation method of a carbonized wood loaded PdCo alloy composite electrocatalyst. The preparation method comprises the following steps: immersing wood chips into a zinc chloride solution for pretreatment, drying, pyrolyzing and carbonizing to obtain carbonized wood with a three-dimensional porous structure; taking the carbonized wood as a working electrode, taking a spectroscopically pure graphite rod as an auxiliary electrode, taking a mixed solution of palladium chloride, cobalt sulfate and sodium citrate as an electrolyte, carrying out constant-current deposition, and depositing a PdCo alloy on the surface of the carbonized wood, so as to obtain the composite electrocatalyst. The carbonized wood with the three-dimensional porous network structure is used asthe carrier of the electrocatalyst, and compared with a carbon carrier commonly used by an existing electrocatalyst, the network structure can provide a more efficient and stable electron transport network, and the conductivity of the composite electrocatalyst is improved; the three-dimensional porous structure is beneficial to exposing more active sites, increasing the electrochemical active areaof the electrocatalyst and being beneficial to quick permeation and diffusion of electrolyte, thereby being beneficial to improving the activity and stability of the composite electrocatalyst.

Description

technical field [0001] The invention belongs to the field of electrocatalytic materials, in particular to a method for preparing a carbonized wood supported PdCo alloy composite electrocatalyst. Background technique [0002] A fuel cell is an energy conversion device that can directly convert chemical energy into electrical energy through a chemical reaction. It has the advantages of high energy conversion efficiency, low environmental pollution, and wide source of raw materials. It is considered to be the most promising energy conversion device in the 21st century. one. At present, the catalysts used in fuel cells are mainly Pt-based catalysts. Due to the disadvantages of low Pt reserves, high price, weak resistance to CO poisoning and poor catalytic stability, the large-scale commercial application of Pt-based catalysts and fuel cells is severely restricted. [0003] Pd and Pt are in the same group VIII, and have catalytic activity equivalent to Pt in alkaline media, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88H01M4/86
CPCH01M4/8882H01M4/926H01M4/8652Y02E60/50
Inventor 许瀚曾志吴义强李万千卿彦夏燎原
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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