Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell

A technology of fuel cells and electrocatalysts, which is applied to battery electrodes, circuits, electrical components, etc., can solve problems limited to the research stage, reduce the utilization rate of precious metals, and limited catalytic activity, and achieve simple processing methods, excellent electrochemical performance, Simple operation effect

Inactive Publication Date: 2015-03-11
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above preparation methods have their own shortcomings. For example, the preparation of Pd-M (M=Pt, Ir, Sn, Au, Co, etc.) can improve the activity of the catalyst to a certain extent, but the dissolution and aggregation of M in the battery environment is fatal. At the same time, Pd, Pt, Au, etc., as noble metals, cannot be widely developed and applied, and the current technical level is limited to the research stage; although non-metallic phosphorus doping can improve the stability

Method used

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  • Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell
  • Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell
  • Preparation method of high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of direct formic acid fuel cell

Examples

Experimental program
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Effect test

Example Embodiment

[0047] Example 1

[0048] (1) Add 0.60g of cobalt chloride hexahydrate and 1.6889g of Vulcan XC-72 produced by American Cabot Company to a beaker containing 50mL of secondary water, sonicate for 30min and stir for 60min, then put it in a muffle furnace at 100°C to dry A black mixture is obtained from the moisture, and then 2.016g of the black mixture and 1.32g of hydrated sodium hypophosphite are added to a quartz boat and placed in a tube furnace, and calcined in a nitrogen atmosphere at 800°C for 60 minutes, where the oxygen flow rate is 80cc min -1 ,Tube furnace from room temperature to 5℃min -1 The heating rate was raised to 800°C, and the composite carrier prepared was marked as CoP / C-10% (where 10% represents the mass percentage of CoP in the composite carrier).

[0049] (2) Weigh 190 mg of CoP / C-10% prepared in step (1), add it to a beaker containing 100 mL of ethylene glycol, and add chloropalladic acid containing 10 mg of palladium at the same time, sonicate for 30 minutes ...

Example Embodiment

[0064] Example 2

[0065] (1) Add 1.20g of cobalt chloride hexahydrate and 1.5016g of Vulcan XC-72 produced by American Cabot Company to a beaker containing 50mL of secondary water, sonicate for 30min, stir for 60min, and then put it in a muffle furnace at 110°C to dry A black mixture is obtained by moisture, and then 2.157g of the black mixture and 2.64g of hydrated sodium hypophosphite are added to a quartz boat and placed in a tube furnace, and calcined in a nitrogen atmosphere at 800°C for 90 minutes, where the oxygen flow rate is 80cc min -1 ,Tube furnace from room temperature to 5℃min -1 The heating rate was raised to 800°C, and the composite carrier prepared was marked as CoP / C-20% (where 20% represents the mass percentage of CoP in the composite carrier).

[0066] (2) Weigh 190 mg of CoP / C-20% prepared in step (1), add it to a beaker containing 100 mL of ethylene glycol, and add chloropalladic acid containing 10 mg of palladium at the same time, sonicate for 30 minutes and s...

Example Embodiment

[0071] Example 3

[0072] (1) Add 1.20g of cobalt chloride hexahydrate and 0.876g of Vulcan XC-72 produced by American Cabot Company to a beaker containing 50mL of secondary water, sonicate for 30min and stir for 60min, then put it in a muffle furnace at 120°C to dry The black mixture is obtained by moisture, and then 1.5313g of the black mixture and 2.64g of hydrated sodium hypophosphite are added to a quartz boat and placed in a tube furnace, and calcined in a nitrogen atmosphere at 800°C for 120 minutes, where the oxygen flow rate is 80cc min -1 ,Tube furnace from room temperature to 5℃min -1 The heating rate was raised to 800°C, and the composite carrier prepared was marked as CoP / C-30% (where 30% represents the mass percentage of CoP in the composite carrier).

[0073] (2) Weigh 190 mg of CoP / C-30% prepared in step (1), add it to a beaker containing 100 mL of ethylene glycol, and add chloropalladic acid containing 10 mg of palladium at the same time, sonicate for 30 minutes and...

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Abstract

The invention relates to a preparation method of a high-performance superlow-palladium-capacity anode electrocatalyst Pd-CoP/C of a direct formic acid 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 in water, drying to obtain a first compound carrier by distillation after ultrasonic dispersing and stirring; mixing and grinding the first compound carrier and hydrated sodium hypophosphite for one-hour reaction, and washing and drying the reactant to obtain a second compound carrier; dispersing the second compound carrier in glycol, adding hexachloropalladate, and performing ultrasonic dispersing and stirring to obtain a first turbid liquid; stirring the first turbid liquid at the room temperature, and regulating the pH value with sodium hydroxide to obtain a second turbid liquid; performing microwave radiation on the second turbid liquid, and obtaining a supported palladium catalyst. The palladium-based catalyst prepared by the method has extremely high catalytic activity and relatively high stability to formic acid electro-oxidation. Meanwhile, the capacity of the precious metal palladium can be reduced, and the method is simple to operate, short in preparation period and suitable for mass production.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for preparing a high-performance ultra-low palladium loading fuel cell anode electrocatalyst Pd-CoP / C for direct formic acid use. Background technique [0002] As an alternative fuel to methanol, direct formic acid fuel (DFAFC) cells have received a lot of attention in recent years. Like methanol, formic acid contains only one carbon atom, no C-C bond, easy to oxidize, cheap and abundant. Not only that, but formic acid has many advantages over methanol: formic acid is non-toxic compared with methanol, and is approved by the US Food and Drug Administration as a food additive; it is non-flammable, safe and convenient for storage and transportation; the theoretical electromotive force of DFAFC is at 25°C at 1.48V, in several proton exchange membrane fuels (CH 3 OH,HCHO,H 2 ) batteries, DFAFC has the highest theoretical open circuit voltage; when formic acid is used as...

Claims

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Application Information

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IPC IPC(8): H01M4/92
CPCH01M4/8817H01M4/8825H01M4/926Y02E60/50
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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