Preparation method of fuel battery catalyst carrier WO3 (Tungsten Trioxide)

A technology of catalyst carrier and fuel cell, applied in the direction of catalyst carrier, chemical instrument and method, physical/chemical process catalyst, etc., to achieve the effect of simple and easy control, wide application value, excellent thermal stability and electrochemical stability

Inactive Publication Date: 2013-04-03
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no research reports on this kind of materials, especially for anode catalyst support materials in proton exchange membrane fuel cells.

Method used

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  • Preparation method of fuel battery catalyst carrier WO3 (Tungsten Trioxide)
  • Preparation method of fuel battery catalyst carrier WO3 (Tungsten Trioxide)
  • Preparation method of fuel battery catalyst carrier WO3 (Tungsten Trioxide)

Examples

Experimental program
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Embodiment 1

[0035] Preparation of Mesoporous Metal Oxide WO Using SBA-15 as Template 3 , the specific implementation method is: 1g SBA-15 is fully dispersed in 30mL ethanol solution, adding metal precursor silicotungstic acid, so that the molar ratio of silicon oxide to metal tungsten is 2, after fully stirring, slowly evaporate the solvent to dryness, and the obtained powder material Moved into a tube furnace, roasted in air at 600°C for 4h, with a programmed temperature rise rate of 2C min -1 . After cooling, remove the silica template with 15% HF, centrifuge, wash with deionized water for 4 to 6 times, and dry at 40°C for 12 hours to obtain the mesoporous metal oxide WO 3 . The prepared mesoporous metal oxide is highly crystalline monoclinic WO 3 (Such as figure 1 ), its specific surface area is 47m 2 g -1 , according to its TEM it can be seen that WO 3 It is a nanocluster composed of parallel nanorods, and the diameter of the nanorods is 7-9nm (such as figure 2 ), which has h...

Embodiment 2

[0037] Carry out experiment with the method identical with embodiment 1, difference with embodiment 1 is, make silicon oxide and metal tungsten molar ratio be 4, as Figure 5 As shown, the prepared mesoporous metal oxide WO 3 Due to the insufficient addition of tungsten precursor, the pores of the molecular sieve were not fully filled, and a relatively dispersed rod-like structure was formed, which shows that the addition of the precursor silicotungstic acid has a certain influence on the morphology of the prepared mesoporous metal oxide.

Embodiment 3

[0039] Experiment with the same method as Example 1, the difference from Example 1 is that the calcination temperature is 500 ° C, the prepared mesoporous metal oxide WO 3 Nano-replicated the pore structure of SBA-15

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Abstract

The invention relates to a preparation method of non-carbon fuel battery catalyst carrier WO3 (Tungsten Trioxide) with high stability by using a silicon oxide molecular sieve as a template. According to the preparation method, the silicon oxide molecular sieve is used as the template, a metal precursor is dipped into a silicon oxide pore passage, and the silicon oxide template is removed through etching after steps of evaporations, roasting and the like, so as to obtain the porous metallic oxide WO3 with controllable appearance. The non-carbon fuel battery catalyst carrier WO3 has excellent stability when being used as a fuel battery catalyst carrier.

Description

technical field [0001] The invention relates to a fuel cell catalyst carrier WO 3 The preparation method, specifically a kind of use silica molecular sieve as template to prepare mesoporous metal oxide WO 3 , can be applied to the field of fuel cells. Background technique [0002] With the in-depth development of proton exchange membrane fuel cells, cost and life have become the two main factors limiting its commercialization. As one of the key materials in battery composition, the catalyst plays an important role, and its stability directly determines the durability of the battery. Carbon-supported platinum is the most commonly used catalyst at present. During the long-term operation of the battery, Pt oxidation, dissolution and growth, and carbon corrosion will occur, especially when the battery is fuel-starved, under the dual effects of high potential and Pt catalysis , the carbon corrosion phenomenon becomes intensified. Although scientific researchers have tried to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/30H01M4/90
CPCY02E60/50
Inventor 侯明窦美玲李光福鲁望婷邵志刚衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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