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Pt doped phosphatizing cobalt bead catalyst carried by methanol carbon dioxide and preparation method of Pt doped phosphatizing cobalt bead catalyst

A particle catalyst, cobalt phosphide technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the limitations of commercial development of methanol fuel cells, Pt/C catalyst poisoning, battery cycle life It can achieve good anti-methanol oxidation intermediate product poisoning performance, improve electrocatalytic activity and stability, and reduce the amount of use.

Inactive Publication Date: 2016-08-03
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current commercial carbon-supported platinum catalyst (Pt / C) is currently the most widely used anode catalyst in low-temperature fuel cells, but during the oxidation of methanol, a series of intermediate products easily lead to poisoning of the Pt / C catalyst, which eventually leads to the cycle of the battery. shorter lifespan
At the same time, the anode catalyst generally uses the noble metal Pt, and factors such as the low reserves of the noble metal lead to high catalyst costs
These factors have greatly limited the commercial development of methanol fuel cells.

Method used

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  • Pt doped phosphatizing cobalt bead catalyst carried by methanol carbon dioxide and preparation method of Pt doped phosphatizing cobalt bead catalyst
  • Pt doped phosphatizing cobalt bead catalyst carried by methanol carbon dioxide and preparation method of Pt doped phosphatizing cobalt bead catalyst
  • Pt doped phosphatizing cobalt bead catalyst carried by methanol carbon dioxide and preparation method of Pt doped phosphatizing cobalt bead catalyst

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Experimental program
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Effect test

Embodiment 1

[0023] Embodiment 1, comprises the following steps:

[0024] Add 50 mg of carbon black material to a mixed solution of 48 mL of absolute ethanol and 1 mL of deionized water, and ultrasonically treat the carbon black material to fully disperse in the solution; add 83 mg of cobalt acetate tetrahydrate to the above solution, and stir to fully dissolve it in Then add 1mL of concentrated ammonia water with a mass concentration of 28% to the solution, heat and reflux at 80°C for 14h to obtain a carbon-supported cobalt complex solution; Filter and wash to remove other remaining ions, and fully dry in a vacuum oven at 60°C to obtain a carbon-supported cobalt tetroxide material; mix it with sodium hypophosphite at a ratio of 1:5, grind it to a uniform powder, and transfer it to a nitrogen-filled In a high-temperature tube furnace, heated to 300°C to fully phosphate tricobalt tetroxide to obtain a CoP / C material; the CoP / C was dispersed in a mixed solution of 45mL ethylene glycol and 15...

Embodiment 2

[0026] Embodiment 2, comprises the steps:

[0027] Add 50mg of carbon black material to the mixed solution of 48mL of absolute ethanol and 1mL of deionized water, and ultrasonically treat the carbon black material to fully disperse in the solution; add 97mg of cobalt nitrate hexahydrate to the above solution, stir to make it fully dissolved Add 1mL of concentrated ammonia water with a mass concentration of 28%, and heat and reflux at 80°C for 14h to obtain a carbon-supported cobalt complex solution; transfer the solution to a hydrothermal reactor and heat it at 140°C for 2h, then filter and wash Remove other remaining ions, and fully dry in a vacuum oven at 60°C to obtain a carbon-supported cobalt tetroxide material; mix it with sodium hypophosphite at a ratio of 1:5, grind it to a uniform powder, and transfer it to a high-temperature tube filled with nitrogen In a type furnace, heated to 300°C to fully phosphate tricobalt tetroxide to obtain the carbon-supported cobalt phosph...

Embodiment 3

[0029] Embodiment 3, comprises the following steps:

[0030] 40mg of carbon black material was added to 49mL of absolute ethanol solution, and ultrasonic treatment made the carbon black material fully dispersed in the solution; 113mg of cobalt nitrate hexahydrate was added to the above solution, stirred to make it fully dissolved, and then 1.2mL of mass concentration was added. 28% concentrated ammonia water was heated and refluxed at 90°C for 15 hours to obtain a carbon-supported cobalt complex solution; the solution was transferred to a hydrothermal reaction kettle and heated at 150°C for 4 hours, filtered and washed to remove other remaining ions, Fully dry in a vacuum oven at 80°C to obtain a carbon-supported cobalt tetroxide material; mix it with sodium hypophosphite at a ratio of 1:5, grind it to a uniform powder, transfer it to a high-temperature tube furnace filled with argon, and heat Phosphate tricobalt tetroxide at 350°C to obtain CoP / C material; disperse CoP / C in a...

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Abstract

The invention discloses Pt doped phosphatizing cobalt bead catalyst carried by methanol carbon dioxide and a preparation method of the Pt doped phosphatizing cobalt bead catalyst. The catalyst is Pt-CoP / C, and the preparation method mainly comprises the following steps: uniformly dispersing a carbon material to a solution of dehydrated alcohol and deionized water, adding cobalt salt and strong ammonia water, and through a heating reflow reaction, generating carbon-carrying cobalt complex compound solution; transmitting the solution into a polytetrafluoroethylene reaction kettle, and performing water heating so as to obtain a carbon-carrying cobaltosic oxide material; mixing the carbon-carrying cobaltosic oxide material with sodium hypophosphite, performing grinding so as to obtain a mixture, and transmitting the mixture to a high-temperature tuber furnace filled with protective gas; preforming heating treatment so as to obtain a CoP / C material, dispersing the CoP / C material to the mixed solution of ethanediol and the deionized water, adding a chloroplatinic acid solution, and then performing a heating reflow reaction so as to obtain a Pt-CoP / C catalyst. Compared with conventional business Pt / C, according to the prepared catalyst disclosed by the invention, the methanol oxidation activity and stability are significantly improved.

Description

technical field [0001] The invention belongs to the research on anode catalysts of methanol fuel cells, and in particular relates to a high-efficiency methanol oxidation carbon-supported Pt-doped cobalt phosphide particle catalyst and a preparation method thereof. Background technique [0002] Since the 21st century, due to the depletion of fossil energy such as oil, natural gas and coal, and the increasingly prominent problems of environmental pollution, the development of new energy technologies with environmental protection and renewable characteristics has attracted widespread attention. Compared with fossil energy, direct methanol fuel cells (DMFCs) are a relatively clean energy source. Its mass specific energy reaches 6000Wh / Kg, which is much higher than that of batteries, and its energy conversion rate can reach 60%-80%. , Secondly, compared with other new energy sources such as hydrogen energy, methanol has the advantages of abundant sources, convenient storage and t...

Claims

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Application Information

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IPC IPC(8): B01J27/185H01M4/92
CPCB01J27/185H01M4/926Y02E60/50
Inventor 申燕肖欣黄德康王鸣魁
Owner HUAZHONG UNIV OF SCI & TECH
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