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Method for reducing molecular oxygen by using tri-aryl corrole cobalt complex as electro-catalyst

A technology of electrocatalysts and complexes, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as high price, high application cost, and application restrictions, and achieve good application prospects

Inactive Publication Date: 2013-03-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precious metal platinum and its alloys are the earliest catalysts used in the electrocatalytic reduction of molecular oxygen. Their catalytic effect is good, but their price is expensive and the application cost is high, so their application in actual production is largely limited.

Method used

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  • Method for reducing molecular oxygen by using tri-aryl corrole cobalt complex as electro-catalyst
  • Method for reducing molecular oxygen by using tri-aryl corrole cobalt complex as electro-catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Take a certain amount of tris(p-chlorophenyl)corrole cobalt as an electrocatalyst, dissolve it in dichloromethane solvent, and prepare a concentration of 1.0 × 10 -3 mol / L solution. Take 2-5 mL of this solution into a 10 mL small beaker, soak a pyrolytic graphite electrode (Pine Instrument Company, USA) in it for 5 to 10 seconds, take it out, and let it dry naturally to be used as a catalytic working electrode.

[0020] Add 50 mL of 1.0 mol / L perchloric acid aqueous solution into the electrochemical cell (150 mL beaker). Install pyrolytic graphite electrode, platinum electrode and saturated calomel electrode to form a three-electrode system. Pass pure compressed air to saturation in the three-electrode electrochemical cell.

[0021] The potential of the disc electrode was controlled from +0.6 to -0.2 V, the potential of the ring electrode was kept at +1.0 V, the electrode rotation speed was 400 rpm, and the scan rate was 10 mV / s to carry out electrochemica...

Embodiment 2

[0024] Take a certain amount of tris(p-methoxyphenyl)corrole cobalt as an electrocatalyst, dissolve it in dichloromethane solvent, and prepare a concentration of 1.0 × 10 -3 mol / L electrocatalyst solution. Take 2-5 mL of this solution in a 10 mL small beaker, soak the pyrolytic graphite electrode in it for 5 to 10 seconds, take it out, and let it dry naturally for use as a catalytic working electrode.

[0025] Add 50 mL of 1.0 mol / L perchloric acid aqueous solution into the electrochemical cell (150 mL beaker). Install pyrolytic graphite electrode, platinum electrode and saturated calomel electrode to form a three-electrode system. Pass pure compressed air to saturation in the three-electrode electrochemical cell.

[0026] The potential of the disc electrode was controlled from +0.6 to -0.2 V, the potential of the ring electrode was kept at +1.0 V, the electrode rotation speed was 400 rpm, and the scan rate was 10 mV / s to carry out electrochemical reduction catalysi...

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Abstract

The invention discloses a method for reducing molecular oxygen by using a tri-aryl corrole cobalt complex as an electro-catalyst, belonging to the technical field of catalytic reduction of molecular oxygen, wherein molecular oxygen in air is reduced in 1.0 mol / L perchloric acid aqueous solution; tri-aryl corrole cobalt electro-catalyst is adsorbed on a pyrolytic graphite electrode; molecular oxygen in air is catalyzed and reduced under a certain potential by using perchloric acid as supporting electrolyte; by using the rotating ring-disc electrode technology, the event that products of electro-catalytic reduction of molecular oxygen in air by using the tri-aryl corrole cobalt under the experimental conditions are hydrogen peroxide and water is detected and determined; the tri-aryl corrole cobalt electro-catalyst is low in use amount and good in catalytic effect; and the tri-aryl corrole cobalt electro-catalyst can be applied to the fields of cathode materials of fuel cells, biomimetic catalysis oxygen reduction and the like.

Description

technical field [0001] The invention relates to a method for reducing molecular oxygen using a triaryl corrole cobalt complex as an electrocatalyst, and belongs to the technical field of catalytic reduction of molecular oxygen. Background technique [0002] The catalytic reduction reaction of molecular oxygen is a very important chemical reaction, especially in electrochemical energy (such as hydrogen-oxygen fuel cell, metal-air battery) and bioenergy conversion. When molecular oxygen is reduced to hydrogen peroxide or water through the two-electron or four-electron pathway, the corresponding energy can be released. As the cathode reaction of a fuel cell, one requires molecular oxygen to be reduced at a relatively positive potential, and the other is to reduce molecular oxygen to water through a four-electron reaction as much as possible, thereby effectively improving its reaction rate and energy utilization. efficiency. Choosing and utilizing a suitable catalyst is an ef...

Claims

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Application Information

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IPC IPC(8): H01M4/90
CPCY02E60/50
Inventor 欧忠平黄诗吕爱香
Owner JIANGSU UNIV
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