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A photocatalytic hydrogen production system, a method for preparing polycarbonyl diiron disulfide cluster compounds, and a method for preparing hydrogen

A technology of polycarbonyl diiron disulfide clusters and photocatalysis, applied in the direction of iron organic compounds, organic compounds/hydrides/coordination complex catalysts, chemical instruments and methods, etc., can solve system deactivation, loss of catalytic activity, Catalyst instability and other problems to achieve high stability and high hydrogen production efficiency

Active Publication Date: 2016-08-31
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The above research results are of great significance for the development of photocatalytic hydrogen production systems, but these systems generally have the following problems: first, the catalyst is unstable under light conditions, and the photocatalytic hydrogen production systems lose their catalytic activity after 3 hours of light, and Most photocatalytic hydrogen production systems lose their catalytic activity after 1 hour of light; second, the efficiency of catalytic hydrogen production is not high. The maximum TON value calculated based on the iron hydrogenase analog compound is 200, and the system is in the mixed solvent of DMF and water. The highest hydrogen production is only 4.2 μmol, and the system is inactivated after 2.5 hours of light; the TON value of most systems is less than 5; third, most systems use noble metals as photosensitizers, which increases the cost of the system
However, there have been no reports on the use of quantum dots as photosensitizers and artificially synthesized iron hydrogenase analog compounds to construct photocatalytic hydrogen production systems.

Method used

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  • A photocatalytic hydrogen production system, a method for preparing polycarbonyl diiron disulfide cluster compounds, and a method for preparing hydrogen
  • A photocatalytic hydrogen production system, a method for preparing polycarbonyl diiron disulfide cluster compounds, and a method for preparing hydrogen
  • A photocatalytic hydrogen production system, a method for preparing polycarbonyl diiron disulfide cluster compounds, and a method for preparing hydrogen

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A photocatalytic hydrogen production system containing polycarbonyl diiron disulfide cluster compounds: the concentration of water-soluble polycarbonyl diiron disulfide cluster compounds is 1.56×10 -4 M; the concentration of CdTe quantum dots (abbreviated as: MPA-CdTeQDs) with mercaptopropionic acid as a stabilizer (in terms of Cd 2+ Meter) is 1.00×10 -3 M; ascorbic acid (H 2 A) The concentration is 8.52×10 -2 M; the size of MPA-CdTe QDs is 3.4nm; the solvent is water; the total sample volume is 10ml; the pH of the sample before light is 4.0.

[0047] The method for preparing hydrogen by using the above-mentioned photocatalytic hydrogen production system is: use λ>400nm visible light to irradiate the sample, and monitor the sample once every 2 hours of illumination; after 10 hours of illumination, the calculated hydrogen production of the sample is about 17.6ml ( TON=505); the sample continued to produce hydrogen in the first ten hours, indicating that the system was...

Embodiment 2

[0051] A photocatalytic hydrogen production system containing polycarbonyl diiron disulfide cluster compounds: the concentration of water-soluble polycarbonyl diiron disulfide cluster compounds is 1.56×10 -4 M; concentration of MPA-CdTe QDs (as Cd 2+ Meter) is 5.00×10 -4 M; ascorbic acid (H 2 A) The concentration is 8.52×10 -3 M; the size of MPA-CdTeQDs is 3.4nm; the solvent is water; the total sample volume is 10ml; the pH of the sample before light is 2.0.

[0052] The method of preparing hydrogen by using the above photocatalytic hydrogen production system is: irradiate the sample with visible light of λ>400nm, and monitor the sample by gas spectrometer every 2 hours of light; after 8 hours of light, the calculated hydrogen production of the sample is about 0.12ml (TON=3); the sample continued to produce hydrogen in the first six hours, indicating that the system was basically stable during the first six hours of light.

[0053] The polycarbonyl diiron disulfide cluster...

Embodiment 3

[0055] A photocatalytic hydrogen production system containing polycarbonyl diiron disulfide cluster compounds: the concentration of water-soluble polycarbonyl diiron disulfide cluster compounds is 1.56×10 -4 M; concentration of MPA-CdTe QDs (as Cd 2+ Meter) is 5.00×10 -4 M; ascorbic acid (H 2 A) The concentration is 8.52×10 -3 M; the size of MPA-CdTeQDs is 3.4nm; the solvent is water; the total sample volume is 10ml; the pH of the sample before light is 3.0.

[0056] The method for preparing hydrogen by using the above-mentioned photocatalytic hydrogen production system is: irradiate the sample with visible light of λ>400nm, and monitor the sample by gas spectrometer every 2 hours of light; after 8 hours of light, the calculated hydrogen production of the sample is about 1.01ml (TON=29); the sample continued to produce hydrogen in the first six hours, indicating that the system was basically stable during the first six hours of light.

[0057] The polycarbonyl diiron disul...

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Abstract

The invention discloses a photocatalytic hydrogen production system containing a polycarbonyl diiron dithiolate cluster compound. The system comprises the polycarbonyl diiron dithiolate cluster compound, CdTe quantum dots, ascorbic acid and a water-containing solvent. The photocatalytic hydrogen production system is high in hydrogen production efficiency and stability and comprises cheap and readily available components, 786mu mol of hydrogen is produced when the total volume of the system is 10ml, and a hydrogen conversion number calculated based on a catalyst is 505.

Description

technical field [0001] The invention relates to a photocatalytic hydrogen production system, a preparation method and a method for preparing hydrogen by using the photocatalytic system, in particular to a photocatalytic hydrogen production system containing polycarbonyl diiron disulfide cluster compounds, polycarbonyl diiron disulfide A method for preparing a cluster compound and a method for preparing hydrogen using a photocatalytic system. Background technique [0002] Using solar energy to split water to produce hydrogen is one of the most ideal methods to solve the energy crisis faced by human beings, because the solar energy involved in the whole reaction process is inexhaustible, and the water reserves on the earth are abundant and the cost is low. After hydrogen is utilized as an energy carrier, the product is water. The process is clean and the result is environmentally friendly. Water can enter the next process of photo-splitting water, forming a closed energy cycle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/04C07F15/02B01J31/22
CPCY02E60/36
Inventor 吴骊珠王锋王晓军
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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