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Preparation method of ultralow platinum-loading capacity Pt-CoP/C anode electrocatalyst for high-activity high-stability direct methanol fuel cell

A methanol fuel cell, high-stability technology, used in fuel cells, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low methanol oxidation activity and high price of precious metal platinum , to achieve the effect of excellent electrochemical performance, simple operation and easy large-scale production

Active Publication Date: 2015-03-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the technical problem that the commercialization of methanol fuel cells is directly affected by the shortcomings of the catalyst prepared by the existing method, such as the high price of precious metal platinum and the low activity of the anode catalyst for methanol oxidation, and provides a high-activity, high-stability direct methanol fuel A method for preparing an ultra-low platinum loading Pt-CoP / C anode electrocatalyst for batteries. The method is simple to operate and has mild conditions, and can obtain a supported platinum catalyst with ultra-low platinum loading, ultra-high activity, and ultra-high platinum utilization

Method used

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  • Preparation method of ultralow platinum-loading capacity Pt-CoP/C anode electrocatalyst for high-activity high-stability direct methanol fuel cell
  • Preparation method of ultralow platinum-loading capacity Pt-CoP/C anode electrocatalyst for high-activity high-stability direct methanol fuel cell
  • Preparation method of ultralow platinum-loading capacity Pt-CoP/C anode electrocatalyst for high-activity high-stability direct methanol fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Add 0.60g of cobalt chloride hexahydrate and 1.6889g of Vulcan XC-72 produced by American Cabot Company into a beaker containing 50mL of secondary water, ultrasonicate for 30min, stir for 60min, then put it in a muffle furnace and evaporate to dryness at 120°C Moisture content to obtain a black mixture, then 2.016g of the black mixture and 1.32g of sodium hypophosphite hydrate were added to a quartz boat, placed in a tube furnace, and calcined at 800°C for 60min in a nitrogen atmosphere, wherein the oxygen flow rate was 80cc min -1 , tube furnace from room temperature to 5 ℃ min -1 The heating rate was increased to 800° C., and the prepared composite carrier was marked as CoP / C-10% (wherein 10% represents the mass percentage of CoP in the composite carrier).

[0048] (2) Weigh 190 mg of CoP / C-10% prepared in step (1), add it into a beaker containing 100 mL of ethylene glycol, and add chloroplatinic acid containing 10 mg of platinum at the same time, stir for 5 h aft...

Embodiment 2

[0064] (1) Add 1.20g of cobalt chloride hexahydrate and 1.5016g of Vulcan XC-72 produced by American Cabot Company into a beaker containing 50mL of secondary water, ultrasonicate for 30min and stir for 60min, then put it in a muffle furnace and evaporate to dryness at 120°C The black mixture was obtained by the water content, and then 2.157g of the black mixture and 2.64g of sodium hypophosphite hydrate were added to a quartz boat, placed in a tube furnace, and calcined at 800°C for 60min in a nitrogen atmosphere, where the oxygen flow rate was 80cc min -1 , tube furnace from room temperature to 5 ℃ min -1 The heating rate was increased to 800° C., and the prepared composite carrier was marked as CoP / C-20% (where 20% represents the mass percentage of CoP in the composite carrier).

[0065] (2) Weigh 190 mg of CoP / C-20% prepared in step (1), add it into a beaker containing 100 mL of ethylene glycol, and add chloroplatinic acid containing 10 mg of platinum at the same time, stir...

Embodiment 3

[0071] (1) Add 1.20g of cobalt chloride hexahydrate and 0.876g of Vulcan XC-72 produced by American Cabot Company into a beaker containing 50mL of secondary water, ultrasonicate for 30min and stir for 60min, then put it into a muffle furnace and evaporate to dryness at 120°C The water content gives a black mixture, and then 1.5313g of the black mixture and 2.64g of sodium hypophosphite hydrate are added to a quartz boat, placed in a tube furnace, and calcined at 800°C for 60min in a nitrogen atmosphere, wherein the oxygen flow rate is 80cc min -1 , tube furnace from room temperature to 5 ℃ min -1 The heating rate was increased to 800° C., and the prepared composite carrier was marked as CoP / C-30% (wherein 30% represents the mass percentage of CoP in the composite carrier).

[0072] (2) Weigh 190 mg of CoP / C-30% prepared in step (1), add it into a beaker containing 100 mL of ethylene glycol, and add chloroplatinic acid containing 10 mg of platinum at the same time, stir for 5 h...

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Abstract

The invention relates to a preparation method of an ultralow platinum-loading capacity Pt-CoP / C anode electrocatalyst for a high-activity high-stability direct methanol fuel cell, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: dispersing a carrier and cobalt chloride hexahydrate into water, carrying out ultrasonic dispersion, stirring, and then evaporating to obtain a first composite carrier; mixing and grinding the first composite carrier and sodium hypophosphite hydrate, reacting for 1 hour, and washing and drying to obtain a second composite carrier; dispersing the second composite carrier into ethanediol, adding chloroplatinic acid, carrying out the ultrasonic dispersion, and stirring to obtain a first suspension liquid; stirring the first suspension liquid at room temperature, regulating a pH value through sodium hydroxide to obtain a second suspension liquid; carrying out microwave radiation on the second suspension liquid, and washing and drying to obtain the loading type platinum catalyst. The platinum catalyst prepared by adopting the preparation method disclosed by the invention has very high catalytic activity and stability on methanol electrooxidation and can be used for reducing the loading capacity of noble metal platinum. The preparation method disclosed by the invention has the advantages of easiness for operation, short preparation period and suitability for large-scale production.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing an ultra-low platinum loading Pt-CoP / C anode electrocatalyst for direct methanol fuel cells with high activity and high stability. Background technique [0002] As a clean and efficient energy conversion device, fuel cells have been extensively studied for decades. In the face of the global energy crisis, fuel cells have attracted widespread attention as an energy conversion device, and people hope to meet the global energy demand through the use of fuel cells. Among various types of fuel cells, direct methanol fuel cell (DMFC) is considered the most promising clean energy because of its simple manufacturing procedure and high energy efficiency. DMFC is a power generation device that directly converts chemical energy stored in methanol and oxygen into electrical energy. It has the advantages of high theoretical specific energy, high energy conversion ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90B01J23/42
CPCB01J23/42H01M4/926H01M8/1011Y02E60/50
Inventor 邢巍常进法刘长鹏李晨阳梁亮张弘
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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