A mesoporous Pt/WO* electro-catalyst and its preparing method

An electrocatalyst and mesoporous technology, applied in the field of electrocatalytic materials, to achieve the effects of uniform grain size, mild preparation conditions, and easy operation

Inactive Publication Date: 2008-04-09
SHANGHAI INST OF CERAMIC CHEM & TECH 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 such reports at home and abroad in this regard, especially the use of mesoporous metal oxides as electrocatalyst support materials for alcohol batteries.

Method used

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  • A mesoporous Pt/WO* electro-catalyst and its preparing method
  • A mesoporous Pt/WO* electro-catalyst and its preparing method
  • A mesoporous Pt/WO* electro-catalyst and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] According to the literature report, the template material mesoporous silica KIT-6 was prepared, and the mesoporous WO was prepared by the hard template replication method. 3 For the carrier material, the wide-angle XRD is shown in Figure 1a, and the small-angle XRD is shown in Figure 2a, and the transmission electron microscope photo is shown in Figure 3. Take 0.5g mesoporous WO 3 After the carrier material was ultrasonicated for 15 minutes in a mixture of 10ml of isopropanol and deionized water (volume ratio 1:1), 16.67ml of chloroplatinic acid solution with a concentration of 11.78g / l was added and diluted to 60ml, and continued ultrasonication for 30min to disperse After uniformity, under magnetic stirring at room temperature, slowly dropwise add 0.5 mol / l sodium borohydride solution that is 10 times more than the chloroplatinic acid solution, and continue stirring for 12 hours. The resulting suspension is centrifuged, washed with deionized water, and vacuum-dried at...

Embodiment 2

[0028] The types of experimental raw materials used and the operation are the same as in Example 1, changing H 2 PtCl 6 The amount of solution added to prepare 15wt% Pt / WO 3-mes Electrocatalyst, the wide-angle XRD of the catalyst is shown in Figure 1b, the small-angle XRD is shown in Figure 2b, the transmission electron microscope photo is shown in Figure 5, the EDS energy spectrum is shown in Figure 6, and the specific surface area is 72m 2 g -1 , the electrochemical oxidation catalysis of methanol is shown in Figure 7b.

Embodiment 3

[0030] The types of experimental raw materials used and the operation are the same as in Example 1, changing H 2 PtCl 6 The amount of solution added to prepare 10wt% Pt / WO 3-mes Electrocatalyst with a specific surface area of ​​78m 2 g -1 , the electrochemical oxidation catalysis of methanol is shown in c in Fig. 7.

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Abstract

The invention provides mesoporous Pt / WO3 electro-catalyst and the preparation method thereof. The catalyst takes mesoporous WO3 as the catalyst carrier, mesoporous WO3 carrier material is prepared by a hard template of mesoporous silicon oxide, and then chloroplatinic acid solution is added into the mesoporous WO3 carrier material, metal platinum particles are restored and deposited in the hole channel of the mesoporous WO3 carrier material, thereby obtaining the mesoporous Pt / WO3 electro-catalyst. The preparation condition of the method is moderate, the operation is easy, the dispersion performance of the platinum particles is good, the synergistic catalytic effect can be formed with Pt, and compared with prior electro-catalyst, the novel catalyst has high carbinol electro-oxidation and catalytic activity and CO prevention performance.

Description

technical field [0001] The invention relates to a mesoporous Pt / WO 3 An electrocatalyst and a preparation method thereof belong to the field of electrocatalytic materials. technical background [0002] Direct methanol fuel cell (DMFC) is a proton exchange membrane fuel cell that directly uses methanol as fuel. It has the advantages of abundant methanol source, low price, and its aqueous solution is easy to carry and store. It is especially suitable as a mobile power source for various purposes. Therefore, direct methanol fuel cells have attracted worldwide attention. At present, the research hotspot of direct methanol fuel cell is also one of its main technical difficulties, which is to seek an efficient electrocatalyst for the electrocatalytic oxidation of methanol anode, improve the speed of methanol anodic oxidation, reduce the polarization loss of the anode, and have anti-carbon monoxide poisoning performance. Catalyst to avoid platinum poisoning of CO, an intermediate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/652H01M4/92
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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