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Substituted carbolnie metal complex and application thereof

A coordination compound and metal coordination technology, which is applied to compounds of elements of group 2/12 of the periodic table, compounds containing elements of group 8/9/10/18 of the periodic table, organic chemistry, etc., can solve the problem of cathode performance Attenuation, catalytic active components and unknown structure, unclear mechanism, etc.

Inactive Publication Date: 2004-02-04
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commercialization of DMFC still has many key technical problems to be solved: for example, the problem of finding a cheap and durable catalyst; the problem of crossover caused by methanol passing through the electrolyte membrane; the optimization of the membrane electrode preparation process, etc.
There are problems such as low catalytic activity; weak catalyst immobilization; unclear catalytic active components and structure; unclear mechanism, etc.
However, precious metals and their alloys are expensive, and there is a problem of insufficient resources.
As a cathode catalyst, it can catalyze the oxidation of methanol, causing the performance of the cathode to decline
Transition metal sulfur-containing alloys, transition metal oxides, and transition metal salts have been less studied as cathode catalysts. The reason may be that their catalytic activity is low and they all dissolve in acidic media, causing catalyst loss.

Method used

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  • Substituted carbolnie metal complex and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1: the synthesis of meso-5,10,15,20-tetra(p-methoxyphenyl)porphyrin

[0061] Add 30-60ml of propionic acid, 20-30ml of butyric acid, 20-30ml of nitrobenzene, and 20-30ml of glacial acetic acid into a three-necked flask equipped with a stirrer, a water separator, and a reflux condenser, and heat to reflux for 30-60min at 5 Add dropwise 40mmol p-methoxybenzaldehyde in 30~60ml propionic acid solution within ~30min, add dropwise 40mml (5.36g) freshly steamed pyrrole in 30~60ml nitrobenzene solution within 10~30min, the solution turns from yellow to Purple, brown, brown to black. Heated to reflux for 0.5-2h to obtain a black solution, left to cool overnight, and filtered with suction to obtain a black powder. Wash with secondary water and absolute ethanol to obtain blue-black crystals.

[0062] The crude product was subjected to column chromatography, the column was filled with silica gel, and dichloromethane was used as eluent, and the pure product was obtained...

Embodiment 2

[0063] Embodiment 2: the synthesis of other mesosymmetric four-substituted phenyl porphyrins and

[0064] The purification of the crude product adopts different methods according to the different properties of the substituents. In general, there are several methods: (1) column chromatography; (2) choose a suitable solvent for recrystallization; (3) choose a suitable solvent pyrolysis After freezing and crystallization, etc.

Embodiment 3

[0065] Embodiment 3: the synthesis of meso-5,10,15,20-tetra(p-methoxyphenyl)porphyrin iron (II) complexes

[0066] Solid-phase synthesis method: Mix 0.1 mol of meso-5, 10, 15, 20-tetrakis(p-methoxyphenyl) porphyrin with 0.12 mol of ferrous ammonium sulfate, grind in a special grinder for 20-50 minutes, and use Wash with hot dilute acetic acid three times to remove excess metal salts. The crude product is separated by column chromatography, using neutral alumina or silica gel to fill the column, and using CH 2 Cl 2 , a mixed solvent of petroleum ether for elution to obtain the desired components. The pure product was obtained after three column passes.

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Abstract

A substituted porphyrin-metal coordination compound is prepared by simulating the biologic enzyme catalyst, and can be used as the cathode catalyst of methanol fuel battery.

Description

technical field [0001] The invention relates to porphyrin metal coordination compound and its application in fuel cell catalyst. Background technique [0002] Direct Methanol Fuel Cell (DMFC for short) is a kind of polymer membrane fuel cell that can directly use methanol as fuel. Since methanol can be used directly without an intermediate conversion device, it has the advantages of simple system structure, high volumetric energy density, and convenient fuel replenishment. It solves the problems of high hydrogen purity requirements and inconvenient production, storage, transportation and replenishment in PEMFC. Methanol has a wide range of sources, low price, convenient replenishment, portability, and improved safety. It can be refueled with existing civilian fuel and military logistics support supply systems. It is especially suitable for mobile power sources (electric vehicles, mobile communications, etc.), field operations, border posts and...

Claims

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Application Information

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IPC IPC(8): C07D487/22C07D519/00C07F3/00C07F15/00H01M8/22
CPCY02E60/50
Inventor 李忠芳姚福生王宇新王素文
Owner SHANDONG UNIV OF TECH
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