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Electrocatalyst for proton exchange film fuel cell

A proton exchange membrane and electrocatalyst technology, applied in solid electrolyte fuel cells, fuel cells, battery electrodes, etc., to achieve good thermal stability, strong long-term operating stability, and improved sintering resistance and stability

Active Publication Date: 2007-07-04
中科军联(张家港)新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Electrocatalyst for proton exchange film fuel cell
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  • Electrocatalyst for proton exchange film fuel cell

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0048] Platinum Titanium Carbon (Pt / TiO x / C) (Pt mass percentage 40wt.%, atomic ratio Pt:Ti=5:1) catalyst preparation.

[0049] Carbon black XC-72R is treated with 2N hydrochloric acid and 5N nitric acid solution in advance, after drying at 140°C, weigh 2 grams and disperse with 100ml isopropanol for 30 minutes by ultrasonic oscillation to obtain a carbon slurry, and add ethylene glycol of butyl titanate under stirring solution (containing 482 mg butyl titanate), then dropwise added a mixture of 20 ml isopropanol + 15 ml water + 1 ml nitric acid, stirred for 4 days, titanium was fully hydrolyzed, washed with a large amount of water, and dried to obtain a composite carrier for use. 1.2 g of the prepared composite carrier was ultrasonically vibrated with 200 ml of ethylene glycol for 30 minutes to obtain a carbon slurry. Weigh 2.16g of chloroplatinic acid (containing 0.799g of platinum) and dissolve it in 50ml of ethylene glycol, add it dropwise to the carbon slurry, and after...

preparation Embodiment 2

[0051] Platinum Titanium Carbon (Pt / TiO x / C) (Pt mass percentage 40wt.%, atomic ratio Pt:Ti=1:1) catalyst preparation.

[0052] Other conditions are the same as in Example 1, except that the atomic ratio of Pt and Ti in the catalyst component is changed to 1:1. The platinum metal loading was maintained at 40 wt%. Transmission electron microscopy and X-ray diffraction experimental results show that the catalyst metal particle size and distribution before and after treatment are similar to those in Example 1.

preparation Embodiment 3

[0054] Platinum Titanium Carbon (Pt / TiO x / C) (Pt mass percentage 40wt.%, atomic ratio Pt:Ti=10:1) preparation of catalyst.

[0055] Other conditions are the same as in Example 1, except that the atomic ratio of Pt and Ti in the catalyst component is changed to 10:1. The platinum metal loading was maintained at 40 wt%. Transmission electron microscopy and X-ray diffraction experimental results show that the catalyst metal particle size and distribution before and after treatment are similar to those in Example 1.

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Abstract

An electric catalyst used for proton exchange membrane fuel cells, active component is Pt or PtRu, auxiliary component is titanium oxide; the atom ratio of platinum and titanium is 0.01-99, the atom ratio of platinum and ruthenium is 0.01-99, the particle size of the active component is 1-20nm. The active component can be impregnated in the titanium oxide modified porous conductive material, gained support-type electric catalyst, which contained activity group sharing percentage for the quality of 1-99%, the atom ratio of platinum and titanium is 0.01-99. Active components can be added as a percentage of 0-99% of the auxiliary components, become a multi-component catalysts; adding auxiliary components was transition metal or a transition metal oxides or several. Preparation methods can be used colloidal law or impregnation - Reduction Act. The invention of the electric catalyst can be used in proton exchange membrane fuel cells.

Description

technical field [0001] The invention relates to an electrocatalyst with high stability and high activity applied to a proton exchange membrane fuel cell. [0002] The present invention also relates to a method for preparing the above-mentioned electrocatalyst. [0003] The invention also relates to the use of the electrocatalysts described above. Background technique [0004] Fuel cells have the advantages of high energy conversion efficiency, no pollution, no noise, etc., and have attracted great attention in recent years. In addition to the general characteristics of other fuel cells, proton exchange membrane fuel cells have the advantages of high specific power density and specific energy, rapid start-up at room temperature, no electrolyte loss, and long service life. It is the best candidate power supply, and has broad application prospects in other mobile power supplies and distributed power stations. This type of fuel cell can use hydrogen or reformed gas as fuel, o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/46B01J35/10B01J32/00B01J37/16H01M4/90H01M4/92H01M8/00H01M8/10
CPCY02E60/50
Inventor 孙公权田娟姜鲁华闫世友辛勤
Owner 中科军联(张家港)新能源科技有限公司
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