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Nickel palladium/ silicon microchannel catalyst and application thereof on preparing electrode of integratable direct methanol fuel cell

A silicon microchannel, catalyst technology, applied in catalyst activation/preparation, battery electrodes, physical/chemical process catalysts, etc., can solve problems such as unfavorable direct methanol fuel cell preparation, and achieve the avoidance of poisoning phenomenon, good catalytic activity, and porosity. uniform effect

Inactive Publication Date: 2009-11-18
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbon material itself cannot be combined with the silicon process, so it is not conducive to the preparation of miniaturized and integrated direct methanol fuel cells.

Method used

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  • Nickel palladium/ silicon microchannel catalyst and application thereof on preparing electrode of integratable direct methanol fuel cell
  • Nickel palladium/ silicon microchannel catalyst and application thereof on preparing electrode of integratable direct methanol fuel cell
  • Nickel palladium/ silicon microchannel catalyst and application thereof on preparing electrode of integratable direct methanol fuel cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The fabrication process of electrochemical corrosion microchannels based on MEMS technology has been described in detail in patent application 200610025900. The microchannel hole is a square with a side length of 5 microns, a wall thickness of 1 micron, and a depth of 250 microns. The etched silicon microchannel SEM photo is as follows figure 1 shown.

[0032] 1. Preparation of silicon microchannels:

[0033] The fabrication process of electrochemical corrosion microchannels based on MEMS technology has been described in detail in patent application 200610025900. The microchannel hole is a square with a side length of 5 microns, a wall thickness of 1 micron, and a depth of 250 microns. The etched silicon microchannel SEM photo is as follows figure 1 As shown, the depth of etching can be controlled by etching time.

[0034] 2. Preparation of nickel-palladium / silicon microchannel catalyst

[0035] Wash the silicon microchannel with 1% to 5% HF solution, use the sili...

Embodiment 2

[0045] 1. Fabrication of silicon microchannels: The fabrication process of electrochemical corrosion microchannels based on MEMS technology has been described in detail in patent application 200610025900. The microchannel hole is a square with a side length of 5 microns, a wall thickness of 1 micron, and a depth of 250 microns. The etched silicon microchannel SEM photo is as follows figure 1 As shown, the depth of etching can be controlled by etching time.

[0046] 2. Preparation of nickel-palladium / silicon microchannel catalyst

[0047] Wash the silicon microchannel with 1% to 5% HF solution, use the silicon microchannel as the substrate, and use the electroless plating solution to electrolessly deposit nickel-palladium film on the inner surface of the silicon microchannel, the reaction time is 40 minutes, and the reaction temperature is 80 -85°C, the pH of the electroless plating solution is adjusted to 8.0 with ammonia water, the composition includes:

[0048] NiSO 4 .6...

Embodiment 3

[0055] 1. Preparation of silicon microchannels: The fabrication process of electrochemical corrosion microchannels based on MEMS technology has been described in detail in patent 200610025900. The microchannel hole is a square with a side length of 5 microns, a wall thickness of 1 micron, and a depth of 250 microns. The etched silicon microchannel SEM photo is as follows figure 1 As shown, the depth of etching can be controlled by etching time.

[0056] 2. Preparation of nickel-palladium / silicon microchannel catalyst

[0057] Wash the silicon microchannel with 1% to 5% HF solution, use the silicon microchannel as the substrate, and use the electroless plating solution to electrolessly deposit nickel-palladium film on the inner surface of the silicon microchannel, the reaction time is 30 minutes, and the reaction temperature is 80 -85°C, the pH of the electroless plating solution is adjusted to 8.0 with ammonia water, the composition includes:

[0058] NiSO 4 .6H 2 O 1.5M ...

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Abstract

The invention relates to the field of fuel-cell catalyst, in particular discloses a nickel palladium / silicon microchannel catalyst. The preparation thereof is as follows: the step of electroless plating deposit of a nickel palladium membrane is carried out on a silicon microchannel frame, and a nickel palladium / silicon microchannel composite material is processed by rapid annealing for 6 to 10 minutes at the temperature from 300 to 500 DEG C under the argon atmosphere. The nickel palladium / silicon microchannel catalyst can be used for preparing the electrode of the integratable direct methanol fuel cell.

Description

technical field [0001] The invention relates to the field of fuel cell catalysts, in particular to a nickel-palladium / silicon microchannel catalyst and the application of the nickel-palladium / silicon microchannel catalyst to prepare electrode materials that can be integrated into direct methanol fuel cells. Background technique [0002] A direct methanol fuel cell (DMFC) is a power generation device that uses methanol to react directly on electrodes to convert it into electrical energy. Compared with gas fuel cells, methanol has abundant sources, is easy to store, and has high energy conversion efficiency. The reaction products are mainly carbon dioxide and water, which is very friendly to the environment. with H 2 -O 2 Compared with fuel cells, DMFC has a higher volumetric energy density, so it has attracted much attention in recent years. [0003] For DMFC, the use of catalysts can not only accelerate the electrode reaction, effectively inhibit the occurrence of negativ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/00C23C18/34C23C18/44H01M4/88H01M4/92
CPCY02E60/50
Inventor 王连卫苗凤娟陶佰睿
Owner EAST CHINA NORMAL UNIV
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