Anti methanol toxication platinum bismuth catqalyst and its preparation method

A bismuth catalyst, catalyst technology, applied in electrical components, battery electrodes, circuits, etc.

Inactive Publication Date: 2004-12-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on Pt alloy as DMFC cathode electrocatalyst has just started.

Method used

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  • Anti methanol toxication platinum bismuth catqalyst and its preparation method
  • Anti methanol toxication platinum bismuth catqalyst and its preparation method
  • Anti methanol toxication platinum bismuth catqalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix metal Pt powder with a purity of 99.99% and metal Bi powder with a molar ratio of 1:1 in an agate mortar and transfer them to a cylindrical bearing steel mold with a diameter of 10 mm. Apply a pressure of 10MPa on the desktop electric tablet press produced by the company for cold rolling, and hold the pressure at 10MPa for 100 seconds to obtain a block.

[0021] Put the cylindrical block into a quartz tube with a diameter of 12 mm, and seal the quartz tube after evacuating for 15 minutes. The quartz tube with the sample sealed was put into a heating furnace, and melted at 800°C, and this was repeated 4 times. After the sample is completely cooled, it is taken out, and a bulk platinum-bismuth catalyst is obtained without heat treatment.

Embodiment 2

[0023] Mix metal Pt powder with a purity of 99.99% and metal Bi powder with a molar ratio of 1.5:1 in an agate mortar, and transfer them all to a cylindrical bearing steel mold with a diameter of 10 mm. Apply a pressure of 10 MPa on the desktop electric tablet press produced by the technology company for cold rolling, and hold the pressure for 100 seconds under the pressure of 10 MPa to obtain a cylindrical block.

[0024] Put the cylindrical block into a quartz tube with a diameter of 12 mm, and seal the quartz tube after evacuating for 15 minutes. The quartz tube with the sample sealed was put into a heating furnace, and melted at 800°C, and this was repeated 4 times. Heat treatment at 700° C. for 48 hours to obtain a bulk platinum-bismuth catalyst.

Embodiment 3

[0026]Mix metal Pt powder with a purity of 99.99% and metal Bi powder with a molar ratio of 2:1 in an agate mortar, and transfer them all to a cylindrical bearing steel mold with a diameter of 10 mm. Apply a pressure of 15 MPa on the desktop electric tablet press produced by the technology company for cold rolling, and hold the pressure for 100 seconds under the pressure of 15 MPa to obtain a cylindrical block.

[0027] Put the cylindrical block into a quartz tube with a diameter of 12 mm, and seal the quartz tube after evacuating for 15 minutes. The quartz tube with the sample sealed was put into a heating furnace, and melted at 900°C, and this was repeated 3 times. Heat treatment at 600° C. for 240 hours to obtain a bulk platinum-bismuth catalyst.

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Abstract

The invention provides a platinum-bismuth catalyst and a manufacturing method, which belongs to fuel battery material field. The mol rate of Bi and Pt in the catalyst provided by the invention is 1-2:1. The manufacturing method: the Pt powder and the Bi powder are mixed according to mol proportion of 1-2:1, they are cool rolled into block materials under pressure of 10MPa-20MPa; then they are melted for 2-4 times under 800-1000deg.C. The melted block materials are sealed in vacuum, the product can be acquired after quenching for 0-240 hours under 600-700deg.C. The catalyst in the invention has an excellent carbinol toxin resisting performance and oxygen and reducing electric catalyst performance.

Description

technical field [0001] The invention relates to an anti-methanol poisoning platinum-bismuth electrocatalyst for direct methanol fuel cells and proton exchange membrane fuel cells and a preparation method thereof, belonging to the technical field of fuel cell materials. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is a device that directly converts chemical energy into electrical energy, and has high energy conversion efficiency because it is not limited by the Carnot cycle. Using hydrogen as fuel, oxygen or air as oxidant, and the main product is water, is an ideal environment-friendly energy conversion technology. However, the hydrogen fuel used by PEMFC is unsafe and the transformation of the original gas station into a gas station is costly. Therefore, the automotive industry proposed to develop a fuel cell using liquid fuel, which led to the research of direct methanol fuel cell (DMFC) in the 1990s. upsurge. Compared with other types of fuel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92
CPCY02E60/50
Inventor 夏定国张丽娟赵煜娟袁嵘
Owner BEIJING UNIV OF TECH
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