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Pt/MoS2 nano catalyst and preparation method and application thereof

A nano-catalyst and nano-sheet technology, which can be used in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of high price, and achieve the effect of less special equipment, easy separation, and high catalytic activity.

Active Publication Date: 2018-07-06
INST OF ADVANCED TECH 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 noble metal catalysts have better catalytic activity, but are expensive

Method used

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  • Pt/MoS2 nano catalyst and preparation method and application thereof
  • Pt/MoS2 nano catalyst and preparation method and application thereof
  • Pt/MoS2 nano catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Pt / MoS 2 Preparation of nanocatalysts

[0042] (1) Mix (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea were dissolved in deionized water, (NH 4 ) 6 Mo 7 o 24 4H 2 The quality of O is 1.22g, the quality of thiourea is 1.07g, the volume of deionized water is 34mL, after stirring for 40min, carry out hydrothermal reaction, the temperature of hydrothermal reaction is 218 ℃, the time of hydrothermal reaction is 17.5h, then Cool to room temperature, and 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 speed of centrifugation is 7600 rpm, the time of centrifugation is 7min, and the product obtained by centrifugation is ultrasonically washed with polar solvent for 1min, and dried in vacuum at 61°C overnight to obtain MoS 2 Nanosheets;

[0043] (2) MoS 2 ...

Embodiment 2

[0046] Pt / MoS 2 Preparation of nanocatalysts

[0047] (1) Mix (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea were dissolved in deionized water, (NH 4 ) 6 Mo 7 o 24 4H 2 The mass of O is 1.21g, the mass of thiourea is 1.05g, the volume of deionized water is 34mL, after stirring for 40min, carry out hydrothermal reaction, the temperature of hydrothermal reaction is 215℃, the time of hydrothermal reaction is 17h, then cool to room temperature, the solid material cooled to room temperature is centrifuged, the centrifugation speed is 7000 rpm, the centrifugation time is 5min, the centrifuged product is ultrasonically washed with a polar solvent for 2min, and then the centrifugation is continued. The speed of centrifugation is 7000 rpm, the time of centrifugation is 5min, and the product obtained by centrifugation is ultrasonically washed with a polar solvent for 1min, and vacuum dried overnight at 58°C to obtain MoS 2 Nanosheets;

[0048] (2) MoS 2 The nanosheets were uniform...

Embodiment 3

[0051] Pt / MoS 2 Preparation of nanocatalysts

[0052] (1) Mix (NH 4 ) 6 Mo 7 o 24 4H 2 O and thiourea were dissolved in deionized water, (NH 4 ) 6 Mo 7 o 24 4H 2 The mass of O is 1.25g, the mass of thiourea is 1.08g, and the volume of deionized water is 36mL. After stirring for 50min, carry out hydrothermal reaction. The temperature of hydrothermal reaction is 225℃, and the time of hydrothermal reaction is 19h, then cool to room temperature, the solid material cooled to room temperature is centrifuged, the centrifugation speed is 8000 rpm, the centrifugation time is 7min, the centrifuged product is ultrasonically washed with a polar solvent for 2min, and then the centrifugation is continued. The speed of centrifugation is 8000 rpm, the time of centrifugation is 5min, and the product obtained by centrifugation is ultrasonically washed with a polar solvent for 2min, and vacuum-dried overnight at 62°C to obtain MoS 2 Nanosheets;

[0053] (2) MoS 2 The nanosheets were...

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Abstract

The invention discloses a Pt / MoS2 nano catalyst and a preparation method and application thereof. The Pt / MoS2 nano catalyst is prepared from MoS2 nano sheets and Pt atoms independently loaded on the surfaces of the MoS2 nano sheets. The Pt / MoS2 nano catalyst is built up by loading the platinum single atoms lonely on the substrates of the molybdenum sulfide nano sheets, not only a heterogeneous structure is achieved so that the catalyst can be easily separated, collected and recycled from a reaction system, but also the Pt / MoS2 nano catalyst can have very high catalysis activity in catalyzing hydrogenation of carbon dioxide based on the high-efficiency atom utilization rate of the single atoms, the high metal substrate mutual action and the synergistic effects of adjacent single atoms.

Description

technical field [0001] The invention relates to the technical field of energy catalysis, in particular to a Pt / MoS 2 Nanocatalyst and its preparation method and application. Background technique [0002] In recent years, with the intensification of energy crisis and environmental pollution, the technology of using carbon-containing inorganic substances to prepare small molecular organic substances through thermochemical reactions has received extensive attention. How to conduct safe and efficient reactions is the focus of research in this field. Both carbon dioxide and hydrogen are stable at room temperature and are ideal starting materials for the reaction. The temperature required for the hydrogenation of carbon dioxide is low, and the products are valuable substances such as alkanes, alcohols, ethers, aldehydes, and carboxylic acids. The main products can be controlled by using different catalysts or changing the ratio of reaction gases. Meet different needs. [0003] ...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/10B01J37/16C07C31/04C07C29/157
CPCC07C29/157B01J27/0515B01J37/10B01J37/16B01J35/19B01J35/23C07C31/04Y02P20/52
Inventor 李洪良蒲正天王梦琳曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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