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a pt 1 @mil nano catalyst and its preparation method and application

A nano-catalyst and polar solvent technology, applied in the field of Pt1@MIL nano-catalyst and its preparation, can solve the problems of low energy density of gaseous products, high cost of separation, storage and transportation, and achieve low cost, mild conditions and high catalytic activity Effect

Active Publication Date: 2021-02-19
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

[0011] However, the energy density of gaseous products is low, and the cost of separation, storage and transportation is high. Therefore, liquid products with higher energy density and convenient storage and transportation are more favored.

Method used

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  • a pt <sub>1</sub> @mil nano catalyst and its preparation method and application
  • a pt <sub>1</sub> @mil nano catalyst and its preparation method and application
  • a pt <sub>1</sub> @mil nano catalyst and its preparation method and application

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specific Embodiment approach 1

[0059] The present invention Pt 1 The preparation method of @MIL nano-catalyst comprises the following steps:

[0060] (1) Uniformly disperse the metal-organic framework MIL-101 nanoparticles obtained above in deionized water to obtain a mixed solution A; wherein, the mass-volume ratio (mg / mL) of the metal-organic framework MIL-101 to deionized water is 95:65 ;

[0061] (2) Slowly add potassium tetrachloroplatinate solution and sodium borohydride solution to mixed solution A and mix uniformly to obtain mixed solution B; wherein, the concentration of potassium tetrachloroplatinate solution is 0.03mg / mL, sodium borohydride solution The concentration is 0.003 mg / mL, the volume ratio of potassium tetrachloroplatinate solution and deionized water is 10:60, and the volume ratio of sodium borohydride solution and deionized water is 10:60;

[0062] (3) Stir the mixed solution B at room temperature for 4 hours, and wash the stirred product. The specific operation is as follows: centr...

specific Embodiment approach 2

[0066] The present invention Pt 1 The preparation method of @MIL nano-catalyst comprises the following steps:

[0067] (1) The metal-organic framework MIL-101 nanoparticles obtained above were uniformly dispersed in deionized water to obtain a mixed solution A; wherein, the mass-volume ratio (mg / mL) of the metal-organic framework MIL-101 to deionized water was 105:70 ;

[0068] (2) Slowly add potassium tetrachloroplatinate solution and sodium borohydride solution to mixed solution A and mix uniformly to obtain mixed solution B; wherein, the concentration of potassium tetrachloroplatinate solution is 0.05mg / mL, sodium borohydride solution The concentration is 0.005 mg / mL, the volume ratio of potassium tetrachloroplatinate solution and deionized water is 10:60, and the volume ratio of sodium borohydride solution and deionized water is 10:60;

[0069] (3) Stir the mixed solution B at room temperature for 7 hours, and wash the stirred product. The specific operation is as follow...

specific Embodiment approach 3

[0073] The present invention Pt 1 The preparation method of @MIL nano-catalyst comprises the following steps:

[0074] (1) Uniformly disperse the metal-organic framework MIL-101 nanoparticles obtained above in deionized water to obtain a mixed solution A; wherein, the mass-volume ratio (mg / mL) of the metal-organic framework MIL-101 to deionized water is 100:60 ;

[0075] (2) Slowly add potassium tetrachloroplatinate solution and sodium borohydride solution to mixed solution A and mix uniformly to obtain mixed solution B; wherein, the concentration of potassium tetrachloroplatinate solution is 0.04mg / mL, and sodium borohydride solution The concentration is 0.004 mg / mL, the volume ratio of potassium tetrachloroplatinate solution and deionized water is 10:60, and the volume ratio of sodium borohydride solution and deionized water is 10:60;

[0076] (3) Stir the mixed solution B at room temperature for 5 hours, and wash the stirred product. The specific operation is as follows: ...

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Abstract

The invention discloses a Pt 1 @MIL nanocatalyst, including a substrate; the substrate uses a metal organic framework MIL-101, and the metal organic framework MIL-101 is uniformly loaded with independent platinum atoms Pt; and the platinum atoms Pt and the metal organic framework MIL-101 The mass ratio is (0.18~0.25): (95~105); the nanocatalyst achieves a heterogeneous structure and is easy to separate and collect from the reaction system for reuse. The invention also discloses the Pt 1 Preparation method of @MIL nanocatalyst and its application in carbon dioxide hydrogenation reaction; wherein, the Pt 1 The preparation method of @MIL nanocatalyst has mild conditions, simple procedures, low cost and environmental protection; and Pt 1 @MIL nanocatalyst has high catalytic activity, high methanol selectivity and catalytic stability in catalyzing carbon dioxide hydrogenation reaction, and also has special H 2 Dissociation path, good stability, and suitable for commercial use.

Description

technical field [0001] The invention relates to a nano catalyst, in particular to a Pt 1 @MIL nanocatalysts and their preparation methods and applications. Background technique [0002] Since the human industrial revolution, due to the extensive use of fossil fuels, the emission of carbon dioxide has been increasing day by day. At the same time, due to the massive emission of carbon dioxide, the greenhouse effect is becoming more and more obvious. Therefore, finding suitable ways to recover atmospheric CO 2 To realize the carbon cycle and convert other renewable energy sources (light energy, heat energy, electric energy, etc.) [0003] CO 2 The hydrogenation reduction reaction is one of the schemes to simultaneously realize energy conversion and carbon cycle. CO 2 There are many kinds of reduction products in theory, and the simplest reduction product is carbon monoxide (CO). Industrially, the reversed Water-Gas Shift Reaction (rWGSR) can realize such conversion: [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J35/02C07C29/157C07C31/04B01J35/00
CPCC07C29/157B01J31/28B01J35/40C07C31/04Y02P20/52
Inventor 陈奕臻李洪良王梦琳闫旭鹏张文博曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA