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Platinum-based catalyst and preparation method and application thereof

A catalyst, platinum-based technology, applied in the field of electrochemical catalysis, can solve the problem of low utilization rate of platinum, and achieve the effect of improving utilization rate, good application prospect, and good conductivity

Active Publication Date: 2020-10-30
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a platinum-based catalyst and its preparation method and application, aiming to solve the problem of low platinum utilization in the existing Pt / C catalyst technical problem

Method used

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

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preparation example Construction

[0034] Correspondingly, the embodiment of the present invention also provides a preparation method of a platinum-based catalyst, which includes the following steps:

[0035] S1, providing melamine, carbon source, solvent and platinum source;

[0036] S2. Dispersing melamine and a carbon source in a solvent, drying and annealing to obtain a nitrogen-containing carbon carrier;

[0037] S3, preparing a nitrogen-containing carbon carrier and a platinum source into a precursor dispersion solution containing platinum ions;

[0038] S4, reducing the platinum ions in the precursor dispersion solution to obtain a platinum-based catalyst;

[0039] Among them, the annealing treatment includes two stages, the first stage is annealing at 500°C-600°C for 1h-2h at a heating rate of 1°C / min-2°C / min, and the second stage is annealing at 1°C / min-2 ℃ / min heating rate, annealing at 800℃-900℃ for 6h-8h.

[0040] The preparation method provided by the embodiment of the present invention uses mel...

Embodiment 1

[0060] The present embodiment provides a kind of preparation method of platinum-based catalyst, comprises the following steps:

[0061] (11) Dissolve 10 g of melamine and 0.5 g of D(+)-glucosamine hydrochloride in a mixed solution of 35 ml of methanol and 15 ml of water, stir evenly, carry out rotary evaporation and drying, fully grind, and place the mixture powder in a tube In a type furnace, argon is used as an inert protective atmosphere for high-temperature annealing treatment. First, the heating rate is raised to 600°C at a rate of 1°C per minute for 1 hour, and then the heating rate is raised to 800°C at a rate of 2°C for 8 hours, and then the temperature is naturally lowered. , to obtain a carbon nanosheet carrier with high nitrogen content;

[0062] (12) Disperse 50 mg of carbon nanosheet carrier with high nitrogen content in 25 ml of deionized water, stir for 1 hour, and ultrasonically treat for 1 hour to obtain a carbon nanosheet carrier solution; slowly drop 1 ml of...

Embodiment 2

[0069] The present embodiment provides a kind of preparation method of platinum-based catalyst, comprises the following steps:

[0070] (21) Dissolve 10 g of melamine and 1 g of D(+)-glucosamine hydrochloride in a mixed solution of 35 milliliters of methanol and 15 milliliters of water, stir well, carry out rotary evaporation and drying, fully grind, and place the mixture powder in a tube In the furnace, argon is used as an inert protective atmosphere for high-temperature annealing treatment. First, the temperature is raised to 600°C at a rate of 1°C per minute and kept for 1 hour, and then the temperature is raised to 800°C at a rate of 2°C for 6 hours, and then the temperature is naturally lowered. A carbon nanosheet carrier with high nitrogen content can be obtained;

[0071] (22) Disperse 50 mg of carbon nanosheet carrier with high nitrogen content in 25 ml of deionized water, stir for 1 hour, and ultrasonically treat for 1 hour to obtain a carbon nanosheet carrier solutio...

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Abstract

The invention belongs to the technical field of electrochemical catalysis, and particularly relates to a platinum-based catalyst as well as a preparation method and application thereof. The platinum-based catalyst comprises a nitrogen-containing carbon carrier and platinum atoms loaded on the nitrogen-containing carbon carrier, and belongs to a loaded catalyst. The nitrogen-containing carbon carrier has good electrical conductivity, so the high-content nitrogen element is doped, the adsorption, the coordination and the anchoring of platinum atoms are easily achieved, the platinum atoms are uniformly distributed on the nitrogen-containing carbon carrier in a single atom state, the high dispersibility is provided, the agglomeration phenomenon cannot be generated, the platinum utilization rate in the platinum-based catalyst can be improved during the catalysis process, the platinum loading capacity is reduced, and the obtained platinum-based catalyst has advantages of low platinum and high efficiency. Meanwhile, the platinum-based catalyst disclosed by the invention has dual activities of catalyzing hydrogen evolution and hydrogen oxidation, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of electrochemical catalysis, and in particular relates to a platinum-based catalyst and its preparation method and application. Background technique [0002] The growing energy demand and environmental problems force countries around the world to start looking for sustainable, green and environment-friendly energy conversion and storage technologies. Hydrogen, as a clean and sustainable energy carrier, has received more and more attention and is expected to become a traditional fossil fuel. energy alternatives. In the hydrogen energy system, hydrogen production and hydrogen use are two key links, involving energy storage and conversion technologies. At present, the hydrogen production technology is mainly divided into water gas reforming, hydrocarbon cracking, hydrocarbon steam reforming and electrolysis of water to produce hydrogen. The first three technologies still rely on traditional fossil energy, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08H01M4/92C25B1/04C25B11/08
CPCB01J27/24B01J37/082H01M4/926C25B1/04B01J35/33Y02E60/36Y02E60/50
Inventor 张震姜诚李辉王海江
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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