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Catalyst with low Pt loading capacity as well as preparation method and application thereof

A catalyst and loading capacity technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of Pt nanoparticle agglomeration and complicated process, and achieve the effects of reducing costs, excellent ORR activity, and improving chemical stability

Pending Publication Date: 2022-04-05
ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of this method is complicated, and the high temperature treatment is easy to cause the agglomeration of Pt nanoparticles.

Method used

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  • Catalyst with low Pt loading capacity as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of a catalyst with a low Pt load, comprising the following steps:

[0027] Preparation of Fe-N-C catalyst carrier: weigh 2.2g Zn(NO 3 ) 2 ·6H 2 O, 0.2g Fe(NO 3 ) 3 9H 2 O was dissolved in 100ml of anhydrous methanol, ultrasonically mixed for 20min, and recorded as solution A. Weigh 2.5g of 2-methylimidazole and dissolve it in 20ml of anhydrous methanol, stir for 20min, and record it as solution B. Subsequently, the solutions A and B were mixed uniformly and placed in an oil bath at 60° C. for 24 h. After the reaction was completed, it was washed twice with absolute ethanol, and dried in a vacuum oven (60° C.) for 12 hours. The dried white precursor was pyrolyzed at 1100 °C for 1 h under nitrogen atmosphere (heating rate 5 °C min -1 ), and finally the obtained catalyst product is fully ground, which is recorded as Fe-N-C catalyst carrier.

[0028] Supporting Pt and CeO on Fe-N-C Catalyst Support 2 : first disperse 100mg Fe-N-C catalyst carr...

Embodiment 2

[0030] A preparation method of a catalyst with a low Pt load, comprising the following steps:

[0031] Preparation of Fe-N-C catalyst carrier: weigh 2.2g Zn(NO 3 ) 2 ·6H 2 O, 0.2g Fe(NO 3 ) 3 9H 2O was dissolved in 100ml of anhydrous methanol, ultrasonically mixed for 20min, and recorded as solution A. Weigh 2.5g of 2-methylimidazole and dissolve it in 20ml of anhydrous methanol, stir for 20min, and record it as solution B. Subsequently, the solutions A and B were mixed uniformly and placed in an oil bath at 60° C. for 24 h. After the reaction was completed, it was washed twice with absolute ethanol, and dried in a vacuum oven (60° C.) for 12 hours. The dried white precursor was pyrolyzed at 500 °C for 1 h in an ammonia atmosphere (heating rate 5 °C min -1 ), and finally the obtained catalyst product is fully ground, which is recorded as Fe-N-C catalyst carrier.

[0032] Supporting Pt and CeO on Fe-N-C Catalyst Support 2 : first disperse 100mg Fe-N-C catalyst carrier...

Embodiment 3

[0034] A preparation method of a catalyst with a low Pt load, comprising the following steps:

[0035] Preparation of Fe-N-C catalyst carrier: weigh 2.2g Zn(NO 3 ) 2 ·6H 2 O, 0.2g Fe(NO 3 ) 3 9H 2 O was dissolved in 100ml of anhydrous methanol, ultrasonically mixed for 20min, and recorded as solution A. Weigh 2.5g of 2-methylimidazole and dissolve it in 20ml of anhydrous methanol, stir for 20min, and record it as solution B. Subsequently, the solutions A and B were mixed uniformly and placed in an oil bath at 60° C. for 24 h. After the reaction was completed, it was washed twice with absolute ethanol, and dried in a vacuum oven (60° C.) for 12 hours. The dried white precursor was pyrolyzed at 1300 °C for 1 h under an argon atmosphere (heating rate 5 °C min -1 ), and finally the obtained catalyst product is fully ground, which is recorded as Fe-N-C catalyst carrier.

[0036] Supporting Pt and CeO on Fe-N-C Catalyst Support 2 : first disperse 100mg Fe-N-C catalyst carr...

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Abstract

The invention provides a catalyst with low Pt loading capacity, a preparation method and application thereof, and the method comprises the following steps: loading PtCeO2 on a non-noble metal catalyst to prepare PtCeO2 (at) M-N-C, M being a non-noble metal, C being a carbon element, and N being a nitrogen element. The method is suitable for various forms of non-noble metal catalysts, in addition, the reaction conditions of the Pt salt and the Ce salt are mild, a subsequent high-temperature pyrolysis process is not needed, Pt and CeO2 are in a highly dispersed state, and the utilization rate of Pt can be improved by improving the dispersity of Pt, so that the cost is reduced.

Description

technical field [0001] The invention relates to the field of non-precious metal catalysts for proton exchange membrane fuel cells, in particular to a catalyst with low Pt loading, a preparation method and application thereof. Background technique [0002] Pt-based catalysts are usually prepared by three methods: using reducing agents such as sodium borohydride and ascorbic acid to directly support carbon supports through liquid-phase reduction reactions; using magnetron sputtering and physical vapor deposition to support Pt nanoparticles Loaded on the carbon carrier; Pt salt can also be fully impregnated on the carbon carrier, and then heat-treated under a reducing atmosphere to realize the loading of Pt on the carbon carrier. However, the traditional carbon support has no active sites and only plays the role of supporting Pt nanoparticles, and the Pt-based catalyst prepared by the traditional method is difficult to control the dispersion of Pt, and it is easy to form Pt agg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88
CPCY02E60/50
Inventor 滕越张健侯明王缔何良潘东艾军陈庆涛孔明赵骞缪春辉唐龙江
Owner ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER
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