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Indium oxide nano catalyst grown on rGO, preparation method thereof and application thereof

A nano-catalyst and nano-ribbon technology, applied in the field of In2O3 nano-catalysts, can solve the problems of poor catalytic activity, large size, and low atom utilization

Active Publication Date: 2019-09-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional indium-based catalysts have poor catalytic activity due to factors such as excessive size, low atom utilization, and weak adsorption of carbon dioxide, making it difficult to commercialize them.

Method used

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  • Indium oxide nano catalyst grown on rGO, preparation method thereof and application thereof
  • Indium oxide nano catalyst grown on rGO, preparation method thereof and application thereof
  • Indium oxide nano catalyst grown on rGO, preparation method thereof and application thereof

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preparation example Construction

[0033] The present invention provides an In grown on rGO described in the above technical scheme 2 o 3 The preparation method of nanometer catalyst comprises the following steps:

[0034] Disperse sodium oleate, indium trichloride tetrahydrate and reduced graphene oxide nanosheets in deionized water, and stir evenly to obtain a mixed solution;

[0035] The mixed solution was hydrothermally reacted, and the obtained reaction product was washed and dried to obtain In(OH) grown on rGO. 3 nanobelt;

[0036] In(OH) to be grown on rGO 3 Nanoribbons sintered to obtain In grown on rGO 2 o 3 nanocatalyst.

[0037]The method provided by the invention can obtain high loading and In 2 o 3 Composite catalysts for uniform growth of nanoribbons. The method requires less special equipment and the product is easy to separate.

[0038] In the present invention, sodium oleate, indium trichloride tetrahydrate and reduced graphene oxide nanosheets are dispersed in deionized water and sti...

Embodiment 1

[0058] In grown on rGO 2 o 3 Preparation of nanocatalysts

[0059] (1) Dissolve the reduced graphene oxide, sodium oleate and indium trichloride tetrahydrate into deionized water successively under stirring at room temperature. The mass of indium chloride was 95mg, the volume of deionized water was 40mL, and the hydrothermal reaction was carried out after stirring for 25min. Centrifuge the solid material cooled to room temperature, the speed of centrifugation is 7200 rpm, and the time of centrifugation is 5min; the product obtained by centrifugation is ultrasonically washed with a polar solvent for 2min, and then centrifugation is continued. The rotation speed is 7200 rpm, and the centrifugation time is 5 minutes; then the centrifuged product is ultrasonically washed with a polar solvent for 2 minutes. Finally, vacuum freeze-dry at -22°C overnight to obtain In(OH) grown on rGO 3 nanobelt;

[0060] (2) In(OH) to be grown on rGO 3 The nanobelts were sintered in a muffle fu...

Embodiment 2

[0071] In grown on rGO 2 o 3 Preparation of nanocatalysts

[0072] (1) Dissolve reduced graphene oxide, sodium oleate and indium trichloride tetrahydrate in deionized water under stirring at room temperature, the quality of reduced graphene oxide is 80 mg, the quality of sodium oleate is 270 mg, and the quality of trichloride tetrahydrate is 270 mg. The mass of indium chloride was 85mg, the volume of deionized water was 40mL, and the hydrothermal reaction was carried out after stirring for 30min. Centrifuge the solid material cooled to room temperature, the speed of centrifugation is 7600 rpm, and the time of centrifugation is 5 minutes; the product obtained by centrifugation is ultrasonically washed with a polar solvent for 2 minutes, and then centrifuged, centrifuged The rotational speed of the centrifuge was 7600 rpm, and the centrifugation time was 7 min; the product obtained by centrifugation was then ultrasonically washed with a polar solvent for 1 min. Finally, the I...

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Abstract

The invention provides an In2O3 nano catalyst grown on rGO, a preparation method thereof and an application thereof. The catalyst comprises a reduced graphene oxide nanosheet and an In2O3 nanobelt composited on the surface of the reduced graphene oxide nanosheet. In the catalyst, the In2O3 nanobelt is grown in situ on the rGO nanosheet substrate uniformly, achieving a heterogeneous structure, allowing the catalyst to be easily separated from a reaction system, collected and reutilized, and allowing the catalyst to have high catalytic activity for catalyzing carbon dioxide electroreduction based on a characteristic that a two-dimensional material has a high atom utilization rate and has strong coupling function with a substrate. The catalyst in carbon dioxide electroreduction has formic acid and carbon monoxide selectivity of more than 90% after -0.7 V, and has formic acid selectivity of 84.6% at -1.2 V, the initial activity is still maintained after 10 h of working at -1.2V, indicatingthat the catalyst can be repeatedly utilized after long-time catalysis.

Description

technical field [0001] The invention belongs to the technical field of indium-based catalysts, in particular to an In grown on rGO 2 o 3 Nanocatalyst, its preparation method and its application. Background technique [0002] In recent years, with the increasing energy crisis and environmental pollution, the technology of using carbon-containing inorganic substances to prepare small molecular organic substances through electrochemical reactions has attracted extensive attention. How to conduct safe and efficient response is the focus of research in this field. Carbon dioxide is stable at room temperature and has good water solubility, so it is an ideal raw material for the reaction. The voltage required for the electroreduction of carbon dioxide is low, and the products are valuable substances such as carbon monoxide, carboxylic acid, and low-carbon hydrocarbon alcohols. The main products can be controlled by using different catalysts or changing the reduction voltage to m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/08C25B3/04C25B11/06C25B3/25
CPCB01J23/08C25B11/04C25B3/25B01J35/33
Inventor 张志荣曾杰
Owner UNIV OF SCI & TECH OF CHINA
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