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Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method of platinum-cobalt alloy carbon catalyst

A proton exchange membrane, platinum-cobalt alloy technology, applied in solid electrolyte fuel cells, battery electrodes, circuits, etc., can solve problems such as insufficient description of catalyst application, and achieve strong preparation process operability, cost reduction, and high power density. Effect

Active Publication Date: 2021-10-22
WUXI WEIFU HIGH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Chinese patent CN111659419A discloses a preparation method of a platinum-based alloy catalyst. The catalyst has excellent oxygen reduction performance, but the catalyst is not actually made into a fuel cell single cell and the performance of the fuel cell is tested, which cannot fully explain that the catalyst meets the requirements of the fuel cell. application in

Method used

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  • Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method of platinum-cobalt alloy carbon catalyst
  • Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method of platinum-cobalt alloy carbon catalyst
  • Platinum-cobalt alloy carbon catalyst for proton exchange membrane fuel cell and preparation method of platinum-cobalt alloy carbon catalyst

Examples

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Embodiment 1

[0029] A preparation method of a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, comprising the following steps:

[0030] (1) Pretreatment: Weigh 1g of platinum-carbon material (self-made platinum-carbon catalyst with a platinum content of 50%, the preparation method is as follows: disperse 0.5g of carbon carrier, platinum-containing compound containing 0.5g of platinum in ethylene glycol, and disperse Obtain a suspension evenly, stir and add a precipitant with a molar mass ratio of 4 to platinum, and an additive with a molar mass ratio to platinum of 1, then heat to boiling in a microwave oven, cool down to room temperature and let stand; The platinum-carbon catalyst can be obtained by drying under low temperature, and the specific carbon carrier, platinum-containing compound, precipitating agent, additive, etc. refer to the Chinese patent with the publication number CN111584884A), measure 80mL of water, 1mL of the concentration of 1mol / L cobalt...

Embodiment 2

[0036] A method for preparing a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, the difference from Example 1 is that 5g of platinum-carbon material is weighed (a self-made platinum-carbon catalyst with a platinum content of 40%, the preparation method is the same as in Example 1), and other The conditions are the same as those in Example 1; the manufacturing and testing conditions of a single cell using the platinum-cobalt alloy carbon catalyst prepared in this example are the same as those in Example 1.

Embodiment 3

[0038] A method for preparing a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell, the difference from Example 1 is that 5g of platinum-carbon material (commercially available 40% Johnson Matthey platinum-carbon catalyst) is taken, and other conditions are the same as in Example 2 The proportions in the same; the single cell production and test conditions using the platinum-cobalt alloy carbon catalyst prepared in this embodiment are the same as in Example 2.

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Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell and a preparation method of the platinum-cobalt alloy carbon catalyst. The preparation method of the platinum-cobalt alloy carbon catalyst comprises a pretreatment process and a reaction process. The obtained crude platinum-cobalt alloy catalyst is subjected to post-treatment, a post-treatment solution A is added into the crude platinum-cobalt alloy catalyst during post-treatment, after treatment is conducted for 0.5-200 h at the temperature of 0-80 DEG C, part of a solvent is removed, then a post-treatment solution B is added, after continuous treatment is conducted for 0.5-200 h at the temperature of 0-80 DEG C, washing is conducted, and drying at 20-85 DEG C is conducted to obtain the platinum-cobalt alloy carbon catalyst. According to the prepared crude platinum-cobalt alloy catalyst, unalloyed elements and impurities on the surface of the catalyst can be removed through post-treatment, raw materials used in the preparation process are environmentally friendly, the preparation technology is high in operability, and commercialization is easy to achieve; and the prepared platinum-cobalt alloy catalyst is excellent in catalytic activity, good in oxygen reduction performance and high in power density when applied to a single battery.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a platinum-cobalt alloy carbon catalyst for a proton exchange membrane fuel cell and a preparation method thereof. Background technique [0002] At present, hydrogen energy is one of the most ideal energy sources in the 21st century, and the efficient use of hydrogen energy has always been a research hotspot for scientists. Proton exchange membrane fuel cells (PEMFCs) can directly convert the chemical energy of hydrogen into electrical energy, with high energy conversion efficiency, and hydrogen energy can be used more effectively. As the "heart" of fuel cells, catalysts play a decisive role in the performance of fuel cells. The development of high-performance, low-cost, and long-life catalysts is a prerequisite for the commercialization of PEMFCs. [0003] Platinum and platinum-based alloy carbon catalysts are still the most widely used PEMFCs catalysts, and in p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88H01M8/10
CPCH01M4/921H01M4/926H01M4/8882H01M8/10Y02E60/50
Inventor 华秋茹张义煌张明陈杰李刚
Owner WUXI WEIFU HIGH TECH CO LTD
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