Ternary composite catalyst containing platinum, transition metal oxide and graphene and preparation method thereof

A composite catalyst and transition metal technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., to achieve long cycle life, high catalytic activity, and mild and controllable process. Effect

Inactive Publication Date: 2012-12-19
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to support highly dispersed platinum on graphene, especially the preparation

Method used

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  • Ternary composite catalyst containing platinum, transition metal oxide and graphene and preparation method thereof
  • Ternary composite catalyst containing platinum, transition metal oxide and graphene and preparation method thereof
  • Ternary composite catalyst containing platinum, transition metal oxide and graphene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Platinum-manganese dioxide-graphene ternary composite electrode catalyst (manganese dioxide: graphene oxide mass ratio is 1:4.6; platinum: manganese dioxide-graphene oxide binary composite mass ratio is 1 :4)

[0031] (1) Add 400mg of graphite oxide to 600mL of deionized water, and sonicate at 30°C for 2 hours to obtain a dispersed solution of graphene oxide;

[0032] (2) Add 20mL of 0.50mol / L potassium permanganate solution to the system of the first step, and stir and react at 120°C for 12 hours;

[0033] (3) Centrifuge the system in the second step to separate the solid product, wash it with deionized water, and dry it at 60°C to obtain a manganese dioxide-graphene oxide composite;

[0034] (4) Weigh 20 mg of the manganese dioxide-graphene oxide composite obtained in the third step, place it in a mixture of 30 mL deionized water and 50 mL ethylene glycol, and ultrasonicate at 30°C for 2 hours to obtain manganese dioxide- Dispersion solution of graphene o...

Embodiment 2

[0039] Example 2: Platinum-zinc oxide-graphene ternary composite electrode catalyst (the mass ratio of zinc oxide:graphene oxide is 1:10; the mass ratio of platinum:zinc oxide-graphene oxide binary composite is 40:1)

[0040] (1) Add 400mg of graphite oxide to 4000mL of deionized water, and sonicate at 20°C for 1 hour to obtain a dispersed solution of graphene oxide;

[0041] (2) Add 1.00mL of 0.49mol / L zinc acetate solution to the system in the first step, and stir and react at 120°C for 1 hour;

[0042] (3) Centrifuge the system in the second step to separate the solid product, wash it with deionized water, and dry it at 40°C to obtain a zinc oxide-graphene oxide composite;

[0043] (4) Weigh 8.00 mg of the zinc oxide-graphene oxide composite obtained in the third step, place it in a mixture of 10 mL deionized water and 70 mL ethylene glycol, and ultrasonicate at 20°C for 1 hour to obtain zinc oxide-graphene oxide Dispersion solution of graphene composite;

[0044] (5) Add...

Embodiment 3

[0046] Example 3: Platinum-cobalt tetroxide-graphene ternary composite electrode catalyst (mass ratio of cobalt tetroxide:graphene oxide is 10:1; mass ratio of platinum:cobalt tetroxide-graphene oxide binary composite is 1:40)

[0047] (1) Add 400mg of graphite oxide to 40mL of deionized water, and ultrasonicate at 40°C for 3 hours to obtain a dispersed solution of graphene oxide;

[0048] (2) Add 49.83mL of 1.0mol / L cobalt nitrate solution to the system in the first step, and stir and react at 200°C for 72 hours;

[0049] (3) Centrifuge the system in the second step to separate the solid product, wash it with deionized water, and dry it at 80°C to obtain the tricobalt tetroxide-graphene oxide composite;

[0050] (4) Weigh 800 mg of the tricobalt tetroxide-graphene oxide composite obtained in the third step, place it in a mixture of 70 mL deionized water and 10 mL ethylene glycol, and ultrasonicate at 40°C for 3 hours to obtain the tricobalt tetroxide-graphene oxide composite ...

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Abstract

The invention relates to a ternary composite catalyst containing platinum, transition metal oxide and graphene and a preparation method thereof. The method comprises putting graphite oxide into water for ultrasonic dispersion, adding salt solution of the transition metal with continuous stirring so as to fully mix the system, heating to a certain temperature to react, centrifuging to get solid products after the reaction finishes, putting the solid products into a mixed solution of water and glycol for ultrasonic dispersion, adding a platinum nitrate solution and uniformly mixing, and then transferring the mixed system to a hydrothermal reactor to react and obtain the ternary composite catalyst containing the platinum, the transition metal oxide and the grapheme. The catalyst provided by the invention has a relatively good application prospect and economic benefit in fields of organic reaction catalyzing and fuel cells.

Description

technical field [0001] The invention relates to a composite electrode catalyst and a preparation method thereof, in particular to a platinum-transition metal oxide-graphene ternary composite and a preparation method thereof. technical background [0002] Facing the ever-intensifying energy crisis and environmental pollution, environmental protection, energy conservation and emission reduction have become important issues facing society today. The development and utilization of efficient and clean energy conversion systems (such as fuel cells, etc.) is of great significance to the sustainable development of society. [0003] Direct methanol fuel cells have broad application prospects in the field of portable electronic devices because of their high energy conversion efficiency, low operating temperature, low environmental pollution, and simple structure. A large number of research results have shown that metal platinum has high catalytic activity for methanol oxidation react...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J23/60B01J23/89H01M4/92
CPCY02E60/50
Inventor 汪信黄华杰孙小强陈海群朱俊武付永胜陈群何明阳何光裕张文耀钱华玉
Owner NANJING UNIV OF SCI & TECH
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