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Preparation method of high-activity Pt/C catalyst

A high-activity, catalyst technology, applied in the field of nanomaterials, can solve the problems of long time, complex process, high cost, and achieve the effects of less solvent, simple operation method and short synthesis time.

Pending Publication Date: 2022-08-02
TAN KAH KEE INNOVATION LAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a simple process, short synthesis time and environmentally friendly Pt / C catalyst (especially high-load Pt / C C catalyst) preparation method

Method used

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  • Preparation method of high-activity Pt/C catalyst
  • Preparation method of high-activity Pt/C catalyst
  • Preparation method of high-activity Pt/C catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) 3.73g of magnesium sulfate was weighed and dissolved in 250mL of ethanol. After it was completely dissolved, 5g of Cabot's XC-72 carbon black was added. After stirring for 5h, the ethanol was evaporated at 80°C, dried and ground, and placed in a tube furnace. Sintering at 1000 °C for 0.5 h in a helium atmosphere to obtain a MgO / XC-72 carrier with a mass fraction of 20%;

[0037] (2) Weigh 0.1g of MgO / XC-72 carrier and 5mL of ethylene glycol solution in a 30mL glass bottle, and stir until the carrier is evenly dispersed in the solution;

[0038] (3) put the reaction system in (2) into the oil bath pot of 80 ℃ and heat and stir until the temperature is stable;

[0039] (4) adopt the syringe pump to slowly add the ethylene glycol solution of 2.6mL 0.02M chloroplatinic acid hexahydrate, dropwise in 3 minutes, and after the dropwise addition is completed, be incubated for 20min;

[0040] (5) after the reaction is cooled, wash with acetone and deionized water for many ti...

Embodiment 2

[0043] (1) Weigh 2.32g of aluminum nitrate and dissolve it in 400mL of ethanol. After it is completely dissolved, add 10g of Ketjen black (KB), stir for 6h, evaporate the ethanol at 100°C, dry and grind it, put it in a tube furnace under argon Sintering at 500 °C for 1 h in a gas atmosphere to obtain Al with a mass fraction of 10% 2 O 3 / KB vector;

[0044] (2) Weigh 1g Al 2 O 3 / KB carrier, 100mL ethylene glycol and isopropanol mixed solution solution in a 250mL glass bottle, stir until the carrier is evenly dispersed in the solution;

[0045] (3) put the reaction system in (2) into the oil bath pot of 120 DEG C and heat and stir until the temperature is stable;

[0046](4) adopt syringe pump to slowly add the mixed solution of ethylene glycol and isopropanol of the tetraammine platinum nitrate of 68.3mL 0.04M, drip in 3 minutes and complete, after dripping is completed, be incubated 20min;

[0047] (5) after the reaction is cooled, wash with acetone and deionized water ...

Embodiment 3

[0050] (1) Weigh 0.524g of calcium acetate monohydrate and dissolve it in 60mL of propanol. After it is completely dissolved, add 1g of Ketjen Black (KB), stir for 6h, evaporate the propanol at 90°C, dry and grind it, and put it in a tube In the furnace under nitrogen atmosphere at 400 ℃, sintered for 1 h to obtain a CaO / KB carrier with a mass fraction of 15%;

[0051] (2) Weigh 0.25g CaO / KB carrier and 8mL isopropanol solution in a 30mL glass bottle, and stir until the carrier is evenly dispersed in the solution;

[0052] (3) put the reaction system in (2) into the oil bath pot of 100 ℃ and heat and stir until the temperature is stable;

[0053] (4) adopt the constant pressure funnel to slowly add the isopropanol solution of 6.83mL 0.1M platinum tetrachloride, complete dropwise addition in 10 minutes, after the dropwise addition is completed, keep warm for 30min;

[0054] (5) after the reaction is cooled, wash with ethanol and deionized water for many times, and finally chec...

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Abstract

The invention provides a high-activity Pt / C catalyst preparation method, which comprises: (1) dissolving a metal oxide precursor in an organic solvent, adding a carbon carrier, uniformly mixing, evaporating the solvent, drying, grinding into powder, and sintering to obtain a carbon-loaded metal oxide; (2) uniformly mixing the carbon-loaded metal oxide obtained in the step (1) with an alcohol solution to obtain a mixed solution; (3) dropwise adding an alcoholic solution of a water-soluble platinum salt, and uniformly mixing; and (4) after dropwise adding is completed, continuously heating and keeping for 10-60 minutes, cooling to normal temperature, separating, washing and drying to obtain the high-activity Pt / C catalyst. The Pt / C catalyst is synthesized under the assistance of the metal oxide, the operation is simple, the synthesis time is short, and the production efficiency is improved; alcohol is adopted as a solvent for reduction, the reduction temperature is low, and environment friendliness is achieved; the catalyst is washed by using a mixed solution of a volatile organic solvent and deionized water, so that the drying temperature is reduced, the drying time is shortened, and the stability of the catalyst is favorably improved.

Description

technical field [0001] The invention relates to a preparation method of a high-activity Pt / C catalyst, belonging to the field of nanomaterials. Background technique [0002] Due to the environmental pollution problems and energy depletion caused by traditional fossil energy, it is of great practical significance to find alternative clean energy. Proton exchange membrane fuel cells have many advantages such as cleanliness and high efficiency, and can directly convert fuel into electrical energy, which has become a research hotspot among many new energy sources. However, the current research on fuel cell performance, life and cost is still immature. Among them, Pt / C catalyst accounts for 40-50% of the cost of fuel cell membrane electrodes. Therefore, improving the catalytic activity of Pt / C catalyst has received much attention. extensive attention. [0003] At present, the preparation methods of Pt and Pt alloy catalysts for fuel cells mainly include oleic acid / oleylamine me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/92
CPCH01M4/88H01M4/921H01M4/926Y02E60/50
Inventor 郑南峰李岚方晓亮
Owner TAN KAH KEE INNOVATION LAB
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