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A method for the controllable preparation of highly dispersed mesoporous carbon-based composites with platinum particles as electrocatalysts for efficient hydrogen production

A technology of composite materials and mesoporous carbon, which is applied in the field of nanomaterials, can solve the problems of inability to meet the needs of industrial development, low catalytic activity, and insufficient storage, and achieve increased electrocatalytic active sites, good catalytic properties, and improved electrocatalytic performance. active effect

Active Publication Date: 2020-08-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Electrochemical splitting of water to produce hydrogen is an effective method for producing hydrogen in large quantities. However, this process relies on highly active and stable electrocatalysts.
[0003] Platinum-based catalysts have long been considered the most efficient catalysts for electrochemical hydrogen production, but their high prices are far from meeting the needs of industrial development due to insufficient storage and uneven distribution on the earth.
In the process of electrocatalytic hydrogen production, the known catalytic active sites are only located on the edge of the noble metal platinum particles, while the catalytic activity inside the particles is relatively small, and the noble metal platinum particles are easy to agglomerate during the electrochemical hydrogen production process

Method used

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  • A method for the controllable preparation of highly dispersed mesoporous carbon-based composites with platinum particles as electrocatalysts for efficient hydrogen production
  • A method for the controllable preparation of highly dispersed mesoporous carbon-based composites with platinum particles as electrocatalysts for efficient hydrogen production
  • A method for the controllable preparation of highly dispersed mesoporous carbon-based composites with platinum particles as electrocatalysts for efficient hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Dissolve 50mg of zirconium chloride, 50mg of tetracarboxyporphyrin and 2700mg of benzoic acid in 8mL of N,N-diethylformamide, and sonicate until it dissolves evenly. Pour this mixed solution into a 25mL polytetrafluoroethylene reaction kettle. Place in the oven at 120°C for 48 hours, then set the oven temperature to 130°C for 24 hours. After the reactor was naturally cooled to room temperature, a reddish-brown precipitate precipitated out at the bottom of the reactor, and was centrifuged and washed with ethanol for several times until the supernatant became colorless and transparent, and the reddish-brown precipitate was dried to obtain a loaded precursor. Weigh it according to the mass ratio of the loaded precursor to ammonium chloroplatinate as 2:1 and place it in a 25mL glass reaction bottle, add 10ml of N,N-dimethylformamide, and sonicate until the dispersion is uniform . Put it into an oven, keep it at 85 degrees Celsius for 48 hours, and then cool it naturally to...

Embodiment 2

[0049] Dissolve 550mg of zirconium chloride, 550mg of tetracarboxyporphyrin and 29.7g of benzoic acid in 88mL of N,N-diethylformamide, and sonicate until it dissolves evenly. Pour this mixed solution into a 200mL polytetrafluoroethylene reaction kettle. Put it in an oven, keep it at 125 degrees Celsius for 36 hours, and keep it at 135 for 30 hours. After the reactor was naturally cooled to room temperature, a reddish-brown precipitate precipitated out at the bottom of the reactor, and was centrifuged and washed with ethanol for several times until the supernatant became colorless and transparent, and the reddish-brown precipitate was dried to obtain a loaded precursor. According to the mass ratio of the loaded precursor to ammonium chloroplatinate of 3:1, it was weighed and placed in a 25 ml glass reaction bottle, 10 ml of water was added, and ultrasonicated until the dispersion was uniform. Put it into an oven, keep it at 80 degrees Celsius for 24 hours, and then cool it nat...

Embodiment 3

[0051] The composite material prepared in Example 1 was tested.

[0052] The scanning electron microscope image of the loaded precursor and platinum particles highly dispersed mesoporous carbon matrix composite was characterized by a JSM-6700 scanning electron microscope;

[0053] The powder diffraction pattern before and after loading the precursor with platinum is characterized by a MiniFlex II powder diffractometer;

[0054] The transmission electron microscope images of loaded precursors and platinum particles highly dispersed mesoporous carbon matrix composites were characterized by TecnaiG2F20 transmission electron microscope;

[0055] The electrocatalytic hydrogen production experiment of platinum particles highly dispersed mesoporous carbon matrix composites was completed by electrochemical workstation CHI760E.

[0056] figure 1 SEM image of the loaded precursor prepared for Example 1. a represents the 5000 times magnified scanning electron microscope image of the l...

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Abstract

The invention relates to a method for preparing highly dispersed mesoporous carbon-based composite materials with platinum particles. The method includes: 1) mixing tetracarboxyporphyrin, zirconium tetrachloride, benzoic acid and N,N-diethylformamide Obtain a platinum-loaded carrier; 2) Dissolve the platinum-loaded carrier obtained in step 1) and a certain amount of platinum source in N,N-dimethylformamide, water or a mixed solution of both, and heat to a certain temperature , keep for a certain period of time to obtain a platinum-loaded calcined precursor; 3) roast and carbonize the platinum-loaded calcined precursor obtained in step 2) in an inert gas; 4) use acid (preferably hydrofluoride) to treat the calcined product obtained in step 3) acid) treatment, the composite material can be obtained. The highly dispersed mesoporous carbon-based composite material with platinum particles according to the present invention can be used as an efficient electrochemical hydrogen production catalyst. By utilizing the nano size effect and surface effect of the highly dispersed platinum particles, the platinum particles can be fully utilized and resources can be greatly improved. utilization rate.

Description

technical field [0001] The invention mainly relates to the technical field of nanometer materials, and is a method for controllably preparing noble metal nanoparticles loaded on carbon-based materials for efficient electrocatalytic hydrogen production. Background technique [0002] As global energy and environmental problems become increasingly prominent, hydrogen, as a high-calorie, clean and non-polluting energy, is expected to become a substitute for fossil fuels. Electrochemical splitting of water to produce hydrogen is an efficient method for producing hydrogen in large quantities, but this process relies on highly active and stable electrocatalysts. [0003] Platinum-based catalysts have long been considered the most efficient catalysts for electrochemical hydrogen production, but their high prices are far from meeting the needs of industrial development due to insufficient storage and uneven distribution on the earth. In the process of electrocatalytic hydrogen produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42C25B1/02C25B11/04
CPCC25B1/02B01J23/42C25B11/093B01J35/393B01J35/33
Inventor 李扬毋欣张华彬康遥张健
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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