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Platinum-based catalyst as well as preparation method and application thereof

A catalyst, platinum-based technology, applied in the field of platinum-based catalysts and their preparation, can solve the problems of complex process flow, high raw material prices, etc., and achieve the effect of simplifying the experimental process, realizing large-scale production, and reducing costs

Active Publication Date: 2022-01-14
佛山仙湖实验室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After years of hard work, although the preparation technology of platinum-based nanowires has made great progress, its large-scale promotion is limited to a certain extent due to its complex process, high raw material prices, and potential environmental risks from production waste.

Method used

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  • Platinum-based catalyst as well as preparation method and application thereof
  • Platinum-based catalyst as well as preparation method and application thereof
  • Platinum-based catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of platinum-based catalyst, comprising the following steps:

[0038] (1) Add 30mg of platinum acetylacetonate, 200mg of potassium chloride and 200mg of boric acid successively into the ball milling tank, and after ball milling for 30min to fully mix the raw materials, put them into a quartz boat and transfer them to H 2 Carry out temperature-programmed heat treatment in an atmosphere tube furnace, the treatment temperature is 300°C, the treatment time is 1 hour, and the heating rate is 5°C / min to obtain the reaction product;

[0039] (2) Transfer the reaction product to a 1mol / L sulfuric acid solution, treat it at 80°C for 2 hours, pickle, centrifuge, wash and dry to obtain a platinum-based catalyst;

[0040] (3) Mix 10 mg of platinum-based catalyst and 40 mg of XC-72 carbon powder in 10 ml of cyclohexane solution, and disperse ultrasonically for 1 hour, so that the platinum-based catalyst is evenly deposited on the carbon carrier, and after centrif...

Embodiment 2

[0042] A preparation method of platinum-based catalyst, comprising the following steps:

[0043] (1) Add 30mg of platinum acetylacetonate, 10mg of nickel acetylacetonate, 400mg of potassium chloride and 300mg of boric acid into the ball mill tank successively, and after ball milling for 30min, the raw materials are fully mixed, then put into the quartz boat and transferred to H 2 Carry out temperature-programmed heat treatment in an atmosphere tube furnace, the treatment temperature is 300°C, the treatment time is 1 hour, and the heating rate is 5°C / min to obtain the reaction product;

[0044] (2) Transfer the reaction product to a 1mol / L sulfuric acid solution, treat it at 80°C for 2 hours, pickle, centrifuge, wash and dry to obtain a platinum-based catalyst;

[0045] (3) Mix 10 mg of platinum-based catalyst and 40 mg of XC-72 carbon powder in 10 ml of cyclohexane solution, and disperse ultrasonically for 1 hour, so that the platinum-based catalyst is evenly deposited on the ...

Embodiment 3

[0047] A preparation method of platinum-based catalyst, comprising the following steps:

[0048](1) Add 30mg of potassium chloroplatinate, 10mg of iron acetylacetonate, 400mg of potassium chloride and 300mg of silicic acid into the ball mill tank successively, and after ball milling for 30 minutes, the raw materials are fully mixed and evenly put into the quartz boat and transferred to H 2 Carry out temperature-programmed heat treatment in an atmosphere tube furnace, the treatment temperature is 300°C, the treatment time is 1 hour, and the heating rate is 5°C / min to obtain the reaction product;

[0049] (2) Transfer the reaction product to a 1mol / L sulfuric acid solution, treat it at 80°C for 2 hours, pickle, centrifuge, wash and dry to obtain a platinum-based catalyst;

[0050] (3) Mix 10 mg of platinum-based catalyst and 40 mg of XC-72 carbon powder in 10 ml of cyclohexane solution, and disperse ultrasonically for 1 hour, so that the platinum-based catalyst is evenly deposit...

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Abstract

The invention belongs to the technical field of catalysts, and particularly discloses a platinum-based catalyst as well as a preparation method and application thereof. The platinum-based catalyst is prepared from a platinum precursor and auxiliaries, and the auxiliaries comprise chloride and inorganic acid; the chloride comprises sodium chloride and / or potassium chloride; the inorganic acid comprises boric acid and / or silicic acid. The preparation method of the platinum-based catalyst comprises the following steps: mixing a platinum precursor, transition metal precursor salt and auxiliaries, and carrying out heat treatment in a reducing atmosphere to obtain a reaction product; putting the reaction product in an acid solution for acid pickling, and obtaining the platinum-based catalyst after centrifugation and washing. According to the platinum-based catalyst, the confinement effect of solid crystal chloride is used for replacing a traditional organic solvent, boric acid and silicic acid are used as structure-directing agents, efficient solid-phase preparation of platinum-based nanowires is achieved, dependence of a traditional synthesis method on organic solvents such as oleylamine is avoided, and the preparation method is green and efficient. The prepared catalyst is excellent in oxygen reduction performance.

Description

technical field [0001] The invention belongs to the technical field of catalysts, in particular to a platinum-based catalyst and its preparation method and application. Background technique [0002] Environmental pollution and energy shortage are two serious challenges facing human society today, and it is extremely critical to vigorously develop a variety of alternative renewable energy sources. Proton exchange membrane fuel cell (PEMFC), as a device that can directly convert hydrogen energy into electric energy, has the characteristics of cleanliness, high efficiency, mild operating conditions and rich sources of raw materials. One of the most effective means of environmental problems. [0003] At present, there are still many difficulties to be overcome in order to realize the commercialization and large-scale application of PEMFC fuel cells. The most prominent problem is the slow rate of the cathodic oxygen reduction reaction (ORR), which requires a large amount of pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88B82Y30/00B82Y40/00
CPCH01M4/921H01M4/8825B82Y30/00B82Y40/00H01M2004/8689Y02E60/50
Inventor 汤海波唐浩林刘明瑞
Owner 佛山仙湖实验室
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