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Mesoporous carbon supported Pt nano catalyst and preparation method thereof

A nano-catalyst, mesoporous carbon technology, applied in the field of materials, can solve the problem of small Pt nanoparticles, and achieve the effects of inhibiting agglomeration, good resistance to CO poisoning, and improving stability

Inactive Publication Date: 2011-07-20
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current Pt nano-catalysts mostly use activated carbon as a carrier, although the specific surface area of ​​activated carbon is relatively high, such as the specific surface area of ​​the most commercially used activated carbon Vulcan XC-72. 254m2 / g, but more than 95% of the surface area of ​​activated carbon is in the micropores. Micropores are an important factor determining the adsorption performance of activated carbon, and the Pt nanoparticles adsorbed by micropores are not strong.

Method used

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  • Mesoporous carbon supported Pt nano catalyst and preparation method thereof
  • Mesoporous carbon supported Pt nano catalyst and preparation method thereof
  • Mesoporous carbon supported Pt nano catalyst and preparation method thereof

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Embodiment 1

[0047] 1g SBA-15, 1.25g sucrose, 0.14g sulfuric acid, 5g water, strong ultrasonic for 20min, first bake at 100°C for 6h, then at 160°C for 6h. Grind the dark brown substance obtained, then add 0.8g sucrose, 0.09g sulfuric acid and 5g water in the same proportion, repeat baking at 100°C and 160°C for 6h, and grind again, then put it in the quartz tube In the furnace, the temperature was controlled at 600°C, 700°C, 800°C, and 900°C for 6 hours under a nitrogen atmosphere. Finally, infiltrate 30 mL of 10% hydrofluoric acid (HF) for 24 hours, suction filter, dry, grind and sieve with 200 meshes to obtain the corresponding media at temperatures of 600°C, 700°C, 800°C, and 900°C. Pore ​​carbon is C-600, C-700, C-800, C-900;

[0048] Dissolve 30.0mg of mesoporous carbon corresponding to the above-mentioned different temperatures in 20mL of aqueous solution, raise the temperature to 40°C, stir magnetically (stirring rate 500 r / min), form a carbon slurry after 30min, and slowly add 7....

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Abstract

The invention discloses a mesoporous carbon supported Pt nano catalyst and a preparation method thereof. The method comprises the following steps of: burning mesoporous silicon oxide SBA-15 serving as a template and cane sugar serving as a carbon source to form mesoporous carbon, further supporting Pt nano particles, and finally obtaining the mesoporous carbon supported Pt nano catalyst. In the mesoporous carbon supported Pt nano catalyst, the diameter of the Pt nano particles is in a range of 3 to 5 nanometers; and the mesoporous carbon has larger specific surface area compared with active carbon, the average specific surface area of the mesoporous carbon is 825 m<2> / g, the average aperture is 13.8 nanometers, agglomeration of the Pt nano particles can be better inhibited, and the stability of the Pt catalyst is further improved. The mesoporous carbon supported Pt nano catalyst prepared at a high temperature has higher oxidation effect on CO, namely the catalyst has better CO poisoning resistance.

Description

technical field [0001] The invention relates to a mesoporous carbon-supported Pt nanometer catalyst and a preparation method thereof, belonging to the field of materials. Background technique [0002] In the field of direct methanol fuel cell applications, methanol is a liquid organic compound with the simplest structure at normal temperature and pressure. It is easy to store, convenient to source, and cheap. It is an ideal renewable fuel and does not exist in methanol molecules The binding of C-C bonds has high electrochemical activity and can maintain high energy conversion efficiency. [0003] At present, most of the Pt nanocatalysts used to catalyze the oxidation of methanol have the characteristics of low oxidation performance and poor stability, while mesoporous carbon has higher specific surface area and larger porosity than conventional activated carbon, which has attracted widespread attention of researchers from various countries. The use of mesoporous carbon-supp...

Claims

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Application Information

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IPC IPC(8): B01J29/00B01J35/10
Inventor 徐群杰李金光李巧霞云虹
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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