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Ruthenium water oxidation catalyst as well as preparation method and application of catalyst

An oxidation catalyst and water oxidation technology, applied in the field of photoelectrochemistry, can solve the problems of inability to adjust the distance from the photosensitizer and adsorption, and achieve the effects of good photoelectrochemical performance, high yield, and easy industrialization.

Inactive Publication Date: 2014-04-30
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a ruthenium water oxidation catalyst for photolysis of water molecule devices to realize the catalyst can be freely adjusted and photosensitive The distance between the ruthenium water oxidation catalyst and the photosensitizer can be adjusted to adjust the electron transfer from the ruthenium water oxidation catalyst to the photosensitizer; the ruthenium water oxidation catalyst has strong adsorption and is not easy to desorb.

Method used

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  • Ruthenium water oxidation catalyst as well as preparation method and application of catalyst
  • Ruthenium water oxidation catalyst as well as preparation method and application of catalyst
  • Ruthenium water oxidation catalyst as well as preparation method and application of catalyst

Examples

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Embodiment 1

[0036] This example discloses a mononuclear ruthenium water oxidation catalyst containing flexible chains and phosphoric acid adsorption groups in the axial ligand——μ-4-picoline-μ-4-phosphomethylenepyridine-2,2 '-bipyridine-6,6'-dicarboxyruthenium, whose general formula is shown in V:

[0037]

[0038] The preparation steps of the present embodiment ruthenium water oxidation catalyst-the compound of general formula V are as follows:

[0039] The reactions were carried out under anhydrous and oxygen-free conditions.

[0040] (1) Synthesis of the complex μ-4-methylpyridine-μ-4-phosphate methylenepyridine-2,2’-bipyridine-6,6’-dicarboxyruthenium:

[0041]

[0042] Add 0.6 mmol μ-dimethylsulfoxide-μ-4-picoline-2,2'-bipyridine-6,6'-dicarboxyruthenium and 0.6 mmol compound 4-phosphomethylenepyridine to 50 mL without Water methanol, heated to reflux, stirred overnight. The solvent was removed by a rotary evaporator, and then separated by a silica gel column, and the eluent wa...

Embodiment 2

[0048] This example discloses a mononuclear ruthenium water oxidation catalyst containing flexible chains and phosphoric acid adsorption groups in the axial ligand——μ-4-picoline-μ-4-phosphopropylpyridine-2,2' -Bipyridine-6,6'-dicarboxyruthenium, whose general formula is shown in VI:

[0049]

[0050] The preparation steps of the ruthenium water oxidation catalyst in this embodiment—the compound of general formula VI are as follows:

[0051] The reactions were carried out under anhydrous and oxygen-free conditions.

[0052] (1): Synthesis of the complex μ-4-methylpyridine-μ-4-phosphate propylpyridine-2,2’-bipyridine-6,6’-dicarboxyruthenium

[0053]

[0054] Add 0.6 mmol μ-dimethylsulfoxide-μ-4-picoline-2,2'-bipyridine-6,6'-dicarboxyruthenium and 0.6 mmol compound 4-pyridinepropyl phosphate to 50 mL methanol , heated to reflux and stirred overnight. Remove solvent by rotary evaporator, use gel column for column separation, eluent is CH 2 Cl 2 :CH 3 OH=10:1 (volume ra...

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Abstract

The invention provides a ruthenium water oxidation catalyst and a preparation method and application of the catalyst. The ruthenium water oxidation catalyst has a structure described as a general formula I. According to a flexible chain in an axial ligand of the ruthenium water oxidation catalyst, the degree of spatial freedom is increased, and the distance between the ruthenium water oxidation catalyst and a light-sensitive agent can be freely adjusted, so that the electron transfer from the catalyst to the light-sensitive agent is regulated. Moreover, according to the ruthenium water oxidation catalyst, a phosphate adsorption group is introduced into the axial ligand, so that the adsorption property of the catalyst is improved, and the catalyst is difficult to desorb.

Description

technical field [0001] The invention relates to photoelectrochemical technology, in particular to a ruthenium water oxidation catalyst, preparation method and application. Background technique [0002] Visible light-driven water oxidation molecular devices can be used to construct photoelectrochemical cells, more precisely called dye-sensitized photoelectric synthesis cells. It is different from fuel-sensitized solar cells. Dye-sensitized solar cells convert solar energy into electrical energy, while dye-sensitized photoelectric synthesis cells convert solar energy into chemical energy, which is a form of artificial photosynthesis. The water oxidation catalyst is an important part of this type of molecular device. At present, the water oxidation catalyst of ruthenium bipyridyl dicarboxylate (Lele Duan, etal.JACS.2009, 131, 10397-10399.). By introducing carbon chains of different lengths in the axial ligands, this type of catalyst can be modified to sensitize the catalysts ...

Claims

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Application Information

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IPC IPC(8): B01J31/22C07F15/00H01G9/042
Inventor 孙立成高岩张林林丁欣
Owner DALIAN UNIV OF TECH
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