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Meso-porous C/WO3 electro-catalyst and preparation method thereof

An electrocatalyst, mesoporous technology, applied in the field of mesoporous C/WO3 electrocatalyst and its preparation

Active Publication Date: 2008-05-21
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no research reports on this kind of materials, especially those used as catalyst materials for hydrogen oxidation in proton exchange membrane fuel cells.

Method used

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  • Meso-porous C/WO3 electro-catalyst and preparation method thereof
  • Meso-porous C/WO3 electro-catalyst and preparation method thereof
  • Meso-porous C/WO3 electro-catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The template material mesoporous silica KIT-6 was prepared according to the literature, and the mesoporous WO was prepared by the hard template replication method 3 , that is to inject phosphotungstic acid into the template material in the form of alcohol solution, heat treatment at 500 °C after volatilizing ethanol, remove the template by HF solution, centrifugal washing and vacuum drying to obtain mesoporous WO 3 The XRD of the main material without adding activated carbon is shown in Figure 1, the nitrogen adsorption curve is shown in Figure 2, and the transmission electron microscope photo is shown in Figure 3. The specific surface area is 82m 2 g -1 , the pore structure is regular, and the electrochemical curve is shown in line a in Figure 5.

Embodiment 2

[0023] Get the prepared mesoporous WO in example 1 3 Put 0.2g of material in absolute ethanol for ultrasonic dispersion for 15 minutes to disperse evenly, then add activated carbon black so that the mass ratio of the two is 100:5, continue ultrasonic dispersion for 0.5 hour, and slowly volatilize the ethanol at room temperature to obtain Mesoporous C / WO 3 electrocatalyst. The electrochemical curve is shown as line b in Fig. 5.

Embodiment 3

[0025] Mesoporous WO 3 The preparation of the material is the same as in Example 1, and the amount of activated carbon black added is changed, the mass ratio of the two is 100:10, and the rest of the operations are the same as in Example 2, to obtain C-composite mesoporous WO 3 electrocatalyst. Its transmission electron microscope photo is shown in Figure 4, and the channel structure still remains relatively regular. The electrochemical curve is shown in line c in Fig. 5 .

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Abstract

The invention provides a mesoporous C / WO3 electro-catalyst and a preparation method thereof, which pertains to inorganic energy materials field. The catalyst of the invention takes the mesoporous C / WO3 as a main body, a novel electro-catalyst is formed after loading a certain quantity of activated carbon and platinum analogs of traditional technology is not adopted. Preparation steps are that: a mesoporous WO3 of the high specific surface is prepared by hard template duplication method of silica, then the activated carbon is blended with the mesoporous WO3 in ethanol solution, and the mixture is conducted with anultrasonic dispersion process; ethanol is volatilized gradually at room temperature and the carbon composite mesoporous C / WO3 electro-catalyst is obtained. Hydrogen desorption oxidation activity of the catalyst of the invention can be compared with the existing commercial 20wt percent Pt / C activator, and preparation cost of battery activator is obviously reduced.

Description

technical field [0001] The invention relates to a mesoporous C / WO 3 An electrocatalyst and a preparation method thereof belong to the field of inorganic energy materials. technical background [0002] Fuel cell is a renewable green energy system, which is of great significance to solve the two major problems of "energy shortage" and "environmental pollution" that the world is currently facing. It is considered to be one of the most important new energy technologies in the 21st century. Proton exchange membrane fuel cell (PEMFC) has the characteristics of low operating temperature, fast start-up, and high energy conversion efficiency, and is suitable for applications in electric vehicles, split power stations, and portable electronic products. As one of the key materials of battery, electrocatalyst is the most important material related to the commercialization of proton exchange membrane fuel cell. [0003] At present, the anode catalysts for hydrogen oxidation used in pro...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01J21/18H01M4/90H01M4/96
CPCY02E60/50
Inventor 崔香枝施剑林陈航榕张玲霞
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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