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Catalyst for preparing liquid fuel through carbon dioxide electrochemical reduction and preparation method thereof

Inactive Publication Date: 2013-11-06
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composition of the catalyst is complex, and its preparation method involves high-temperature roasting and electroplating methods, and the process procedures are cumbersome, etc.

Method used

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  • Catalyst for preparing liquid fuel through carbon dioxide electrochemical reduction and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. Preparation of graphite oxide

[0043] 1) Add 1g of graphite powder to a 50mL Erlenmeyer flask, and add a magnetic rotor, then add 50mL of concentrated sulfuric acid solution and 1g of sodium nitrate in an ice-water bath, then stir for 30min; then add 6g of potassium permanganate, continue The reaction was stirred for 30 min. Wherein, the mass percent concentration of the concentrated sulfuric acid solution is 98%.

[0044] 2) 50 mL of deionized water was added dropwise for stirring, and the temperature of the reactant was kept at 35-40° C. by virtue of the exothermic reaction, and the reactant turned brown.

[0045] 3) Heating the graphite solution to 95° C., stirring, and heating for 30 minutes.

[0046] 4) Add 200 mL of deionized water to the graphite solution for dilution, and add 30% hydrogen peroxide dropwise while stirring.

[0047] 200 mL of 10% HCl solution was added. Centrifuge and wash until the solution is neutral, and filter to obtain a filter residu...

Embodiment 2

[0060] 1. Preparation of graphite oxide

[0061] (1) Add 0.5g of graphite powder to a 50mL Erlenmeyer flask, add a magnetic rotor, then add 30mL of concentrated sulfuric acid solution and 1g of sodium nitrate in an ice-water bath, then stir for 30min; then add 4g of potassium permanganate , continue to stir the reaction for 30min. Wherein, the mass percent concentration of the concentrated sulfuric acid solution is 98%.

[0062] (2) 30mL of deionized water was added dropwise and stirred, and the temperature of the reactant was maintained at 35-40°C by exothermic reaction, and the reactant turned brown.

[0063] (3) Heat the graphite solution to 90° C., stir, and heat for 15 minutes.

[0064] (4) Add 200 mL of deionized water to the graphite solution for dilution, and add 30% hydrogen peroxide dropwise while stirring.

[0065] 200 mL of 10% HCl solution was added. Centrifuge and wash until the solution is neutral, and filter to obtain a filter residue.

[0066] Dry the was...

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Abstract

The invention discloses a catalyst for preparing liquid fuel through carbon dioxide electrochemical reduction and a preparation method thereof. The preparation method of the catalyst comprises performing oxidation on graphite to obtain graphite oxide, fully mixing palladium chloride, sodium hydroxide, sodium borohydride and a graphene solution, performing redox reaction and loading palladium in a reduction state on graphene to obtain the palladium catalyst. Palladium particles which are loaded on the surface of the catalyst are uniformly distributed and the average particle size is 3.66 + / - 0.25 nm. The Pd (palladium) is loaded on the grapheme, so that the high dispersion Pd catalyst can be prepared; the Pd can participate in the reaction as a reducing agent, so that a reductive environment is provided and the reaction temperature and pressure is reduced; in addition, the metal palladium greatly improves the activity of the catalyst; carbon dioxide is reduced to liquid fuel methanol, formic acid or acetic acid with the Pd catalyst as an electrochemical cathode and accordingly the reutilization of the carbon dioxide is achieved.

Description

technical field [0001] The invention relates to an electrochemical reduction of CO 2 The invention relates to a catalyst for producing liquid fuel and a preparation method thereof, in particular to a noble metal-combined catalyst and its preparation method and application, which belong to the field of electrochemistry and environmental technology. Background technique [0002] Numerous studies have confirmed that global warming is an "undisputed" fact. CO 2 It is one of the important greenhouse gases. The greenhouse effect causes a series of climate disasters such as global warming, sea level rise, frequent droughts and floods, and extreme weather, which seriously threatens the survival of humans and other animals and plants. As early as the beginning of the 20th century, people began to study the utilization technology of carbon dioxide, but because of the 2 It is chemically stable and is often regarded as an inert substance. It needs high temperature, high pressure or c...

Claims

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Application Information

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IPC IPC(8): B01J23/44C25B3/04C25B11/08B01D53/62B01D53/86C25B3/25
Inventor 王辉刘新卞兆勇逄磊鲁光
Owner BEIJING FORESTRY UNIVERSITY
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