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In-situ synthesis of Pt-supported fullerene catalyst

An in-situ synthesis and catalyst technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the impact of catalyst performance, complex preparation process, and easy introduction of impurities and other problems, to achieve the effects of short preparation time, reduced Pt aggregation, and simple and easy-to-control process steps

Inactive Publication Date: 2007-08-01
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process is complicated, there are many influencing factors, and impurities are easily introduced, which has a great impact on the performance of the catalyst

Method used

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  • In-situ synthesis of Pt-supported fullerene catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0017] Dissolve 1 g of chloroplatinic acid in 1 L of deionized water to prepare a chloroplatinic acid solution with a concentration of 0.00193 mol / L, and add it to a heat-resistant container. Spectroscopically pure graphite rods are used as electrodes, in which the diameter of the cathode is 12mm, and the diameter of the anode is 6mm. The two electrodes are arranged along a horizontal line and immersed in a place 40mm below the liquid surface. The current and voltage are controlled at 30A and 28V respectively, and the gap between the two electrodes must be 0.8mm after arcing. The arc discharge evaporates the anode to provide a carbon source for the growth of the fullerene structure, and at the same time the metal cations in the salt solution are reduced to generate Pt metal particles, which are loaded on the surface of the fullerene structure. The discharge was stopped after 10 minutes, and the product at the bottom of the container was collected after the water was cooled, an...

Embodiment approach 2

[0019] Dissolve 1 gram of chloroplatinic acid in 2L of deionized water to prepare a chloroplatinic acid solution with a concentration of 0.000965 mol / L, and add it to a heat-resistant container. Spectroscopically pure graphite rods are used as electrodes, in which the diameter of the cathode is 12mm, and the diameter of the anode is 6mm. The two electrodes are arranged along a horizontal line and immersed in a place 40mm below the liquid surface. The current and voltage are controlled at 30A and 28V respectively, and the gap between the two electrodes must be 1mm after arcing. The arc discharge evaporates the anode to provide a carbon source for the growth of the fullerene structure, and at the same time the metal cations in the salt solution are reduced to generate Pt metal particles, which are loaded on the surface of the fullerene structure. The discharge was stopped after 10 minutes, and the product at the bottom of the container was collected after the water was cooled, a...

Embodiment approach 3

[0021] Dissolve 1 gram of chloroplatinic acid in 0.5 L of deionized water to prepare a chloroplatinic acid solution with a concentration of 0.00386 mol / L, and add it to a heat-resistant container. Spectroscopically pure graphite rods are used as electrodes, in which the diameter of the cathode is 12mm, and the diameter of the anode is 6mm. The two electrodes are arranged along a horizontal line and immersed in a place 40mm below the liquid surface. The current and voltage are controlled at 30A and 28V respectively, and the gap between the two electrodes must be 1mm after arcing. The arc discharge evaporates the anode to provide a carbon source for the growth of the fullerene structure, and at the same time the metal cations in the salt solution are reduced to generate Pt metal particles, which are loaded on the surface of the fullerene structure. The discharge was stopped after 10 minutes, and the product at the bottom of the container was collected after the water was cooled,...

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Abstract

The invention discloses an original position synthesis method of fullerene Pt catalyst. The method uses the chloroplatinic acid and deionized water to produce chloroplatinic acid solution, places it in containers and then immerses the negative pole and anode under liquid surface to energizing and striking of arc, the electric arc discharges to make the anode evaporate and provide carbon resource for the growth of fullerene structure, while the metal positive ion in brine solution is deacidized to generating Pt metal particles and load is under the surface of fullerene; then stops discharge, collect product after cooling and gains the fullerene Pt catalyst after drying. The innovation of the invention lies on: fullerene is prepared while Pt is loaded on the surface of carbon material, it achieves the original position synthesis of fullerene Pt catalyst; it is tested that the fullerenes Pt catalyst has excellent catalytic activity to carbinol oxidation, and the process is simple and easy to control, the application prospects are charming.

Description

technical field [0001] The invention belongs to a synthesis method of a fullerene-supported Pt catalyst, and mainly relates to an in-situ synthesis method of a carbon nanotube fullerene and an onion-like fullerene-supported Pt catalyst. Background technique [0002] The electrocatalysts commonly used in direct methanol fuel cells are mainly carbon with high specific surface area (such as carbon black, carbon nanotubes, graphite nanofibers) loaded with platinum (Pt) nanoparticles, so that Pt can be better dispersed to reduce the amount of Pt. Reduce catalyst costs. Fullerene materials (carbon nanotubes and onion-like fullerenes) have the advantages of high electrical conductivity, chemical and electrochemical stability, and high specific surface area, and have gradually shown broad application prospects as catalyst supports. The inventors firstly prepared the fullerene-supported Pt catalyst by first preparing the carbon support, and then loading Pt or platinum group metals o...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J21/18H01M4/92
CPCY02E60/50
Inventor 王晓敏郭俊杰刘光焕杨晓伟刘旭光许并社
Owner TAIYUAN UNIV OF TECH
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