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Method for preparing double effect oxygen electrode catalyst

A double-effect oxygen electrode and catalyst technology, applied in battery electrodes, electrochemical generators, components of fuel cells, etc., can solve the problems of complicated procedures and cumbersome processes, and achieve simple operation, low preparation cost, and easy preparation in the preparation process. control effect

Inactive Publication Date: 2009-05-06
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical deposition method introduces NaOH, magnetic stirring and passing N 2 protection, sediments are washed repeatedly, the process is cumbersome and complicated

Method used

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  • Method for preparing double effect oxygen electrode catalyst
  • Method for preparing double effect oxygen electrode catalyst
  • Method for preparing double effect oxygen electrode catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 4mL of ethanol and 6mL of isopropanol to prepare 10mL of organic solvent, then add 15 mg of H to the organic solvent 2 IrCl 6 and 8 mg H 2 PtCl 6 , ultrasonically disperse the mixed solution for 30 minutes to make a mixed solution; pipette 20 μL of the mixed solution per square centimeter of substrate area, and drop it on the surface of the titanium plate. After the organic solvent evaporates, put the titanium plate into a 95°C vacuum oven in vacuum drying for 10 minutes; put it into a tube furnace and sinter it at 350°C for 20 minutes to make H 2 IrCl 6 、H 2 PtCl 6 Thermally decompose to form metal and metal oxide coatings; take out the air and cool to room temperature, repeat the above steps until the required loading capacity is 2mg / cm 2 ;Finally placed in a tube furnace and sintered at 480°C for 0.5 hours, the prepared IrO 2 / Pt catalyst, performance such as figure 1 shown.

Embodiment 2

[0024] Mix 5 mL of ethanol and 5 mL of isopropanol to prepare 10 mL of organic solvent, then add 10 mg of H 2 IrCl 6 and 6 mg H 2 PtCl 6 , ultrasonically disperse the mixed solution for 20 minutes to make a mixed solution; pipette 50 μL of the mixed solution per square centimeter of substrate area, and drop it on the surface of the titanium plate. After the organic solvent evaporates, put the titanium plate into a 75°C vacuum oven in vacuum drying for 5 minutes; put it into a tube furnace and sinter at 450°C for 10 minutes to make H 2 IrCl 6 、H 2 PtCl 6 Thermally decompose to form metal and metal oxide coatings; take out the air and cool to room temperature, repeat the above steps until the required loading capacity is 5mg / cm 2 ;Finally placed in a tube furnace and sintered at 450°C for 1 hour to prepare IrO 2 / Pt catalyst, performance such as figure 2 shown.

Embodiment 3

[0026] Mix 6 mL of ethanol and 4 mL of isopropanol to make 10 mL of organic solvent, then add 20 mg of H to the organic solvent 2 IrCl 6 and 3 mg H 2 PtCl 6 , ultrasonically disperse the mixed solution for 10 minutes to make a mixed solution; pipette 100 μL of the mixed solution per square centimeter of substrate area, and drop it on the surface of the titanium plate. After the organic solvent evaporates, put the titanium plate into a 60°C vacuum oven in vacuum drying for 15 minutes; put it into a tube furnace and sinter at 480°C for 5 minutes to make H 2 IrCl 6 、H 2 PtCl 6 Thermal decomposition to form metal and metal oxide coatings; take out the air and cool to room temperature, repeat the above steps until the required loading capacity is 10mg / cm 2 ;Finally placed in a tube furnace and sintered at 480°C for 1.5 hours, the prepared IrO 2 / Pt catalyst, performance such as image 3 shown.

[0027] By the result of the galvanostatic electrolysis test carried out to the...

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Abstract

The invention relates to a preparation method of a double-effect oxygen electrode catalyst, in particular to the preparation method of a regenerable fueling battery oxygen electrode catalyst taking Pt as a basis. The method comprises the following steps: directly mixing a certain amount of H2IrCI6 and H2 PtCl6 into an organic solvent; adjusting the proportion of the H2IrCI6 and the H2 PtCl6; dripping the mixture onto a conductive matrix; and preparing an IrO2 Pt efficient catalyst through the thermal decomposition method, thereby not only the oxygen-evolution catalytic activity of the catalyst can be greatly improved, the electric potential can be reduced, and the availability of the catalyst is improved, but also the preparation process is simple, and no impurity enters; the prepared product can also be used for cathodic and anodic catalysts for other fuel batteries and other fields such as gas reforming, organic matter schizolysis, pollutant treatment, seawater electrolysis, and the like.

Description

technical field [0001] The invention belongs to the technical field of catalyst production by thermal decomposition method and the field of renewable fuel cells, in particular to a preparation method of a Pt-based double-effect oxygen electrode catalyst for a renewable fuel cell. Background technique [0002] Regenerative Fuel Cell (RFC) is an electrochemical energy conversion device that combines water electrolysis process with fuel cell power generation process. The RFC system is simple, compact, high in reliability and specific energy, low in preparation cost, has unique advantages, rich in fuel sources, low in price, and convenient in storage. The material and energy conversion characteristics of the RFC system make it an important power source for space probes, military fields and field operations. One of the key materials of RFC is the oxygen electrode catalyst, whose activity directly affects the performance of the battery. The performance and life of the double-eff...

Claims

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Application Information

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IPC IPC(8): H01M4/88H01M8/02H01M8/0297
CPCY02E60/50
Inventor 王新东叶锋王同涛李建玲李山梅李晶晶魏浩杰方勇
Owner UNIV OF SCI & TECH BEIJING
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