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A kind of indium oxide nano-catalyst grown on rgo, its preparation method and its application

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: 2021-10-01
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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  • A kind of indium oxide nano-catalyst grown on rgo, its preparation method and its application
  • A kind of indium oxide nano-catalyst grown on rgo, its preparation method and its application
  • A kind of indium oxide nano-catalyst grown on rgo, its preparation method and its application

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Experimental program
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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 is hydrothermally reacted, and the obtained reaction product is 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 In2 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 stirre...

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 5 minutes; the product obtained by centrifugation is ultrasonically washed with a polar solvent for 2 minutes, 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 ...

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. The rotational speed was 7600 rpm, and the centrifugation time was 7 minutes; the centrifuged product was ultrasonically washed with a polar solvent for 1 minute. Finally, the In(OH) grown on rGO was obtained by vacuum f...

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Abstract

The present invention provides an In grown on rGO 2 o 3 Nano-catalyst, its preparation method and application thereof, the catalyst comprises reduced graphene oxide nanosheets and In composite on the surface of reduced graphene oxide nanosheets 2 o 3 nanobelt. The catalyst is based on In 2 o 3 The in-situ and uniform growth of nanobelts on the rGO nanosheet substrate not only realizes the heterogeneous structure, but also makes the catalyst easy to separate and collect from the reaction system for reuse. The strong coupling effect makes it have high catalytic activity in catalyzing the electroreduction reaction of carbon dioxide. In the carbon dioxide electroreduction reaction, the selectivity of the catalyst to formic acid and carbon monoxide exceeds 90% after -0.7V; the selectivity to formic acid is as high as 84.6% at -1.2V. After operating at ‑1.2 V for 10 h, the initial activity is still retained, indicating its reusability after prolonged catalytic reactions.

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 Patents(China)
IPC IPC(8): B01J23/08C25B3/07C25B3/26C25B11/091C25B3/25
CPCB01J35/0033B01J23/08C25B11/04C25B3/25
Inventor 张志荣曾杰
Owner UNIV OF SCI & TECH OF CHINA
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