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Preparation of CO2 electro-reduction catalyst, catalyst and application

A CO2 and catalyst technology, applied in the field of single-atom catalyst preparation, can solve the problems of complex preparation method, large environmental pollution, and waste acid generation, and achieve the effects of simple synthesis method, high catalytic activity, and excellent catalytic effect.

Active Publication Date: 2019-10-01
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN109382106A has prepared a carbon-loaded non-noble metal single-atom catalyst, but its preparation method is very complicated and requires ball milling and pickling processes, so the cost for industrial production is high, and wastes such as waste acid will be produced, which will pollute the environment relatively large

Method used

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  • Preparation of CO2 electro-reduction catalyst, catalyst and application
  • Preparation of CO2 electro-reduction catalyst, catalyst and application
  • Preparation of CO2 electro-reduction catalyst, catalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of graphene airgel

[0032] (1) Disperse 20mg graphene into 10mL deionized water, add 280uL (0.012mM) of nickel chloride hexahydrate and 15uL of 30wt% hydrogen peroxide, after fully stirring, 60mg of melamine foam is immersed in the above-mentioned mixed solution, and then Dry at 70°C in a vacuum box, repeat dipping-drying until the mixed solution is completely absorbed into the melamine foam, and finally the graphene airgel precursor is obtained.

[0033] (2) Put the graphene airgel precursor into a quartz boat, and under the protection of inert gas Ar, heat up from room temperature to the pyrolysis temperature at a heating rate of 5°C / min, and pyrolyze at a high temperature of 900°C for 1 hour, Graphene airgel is obtained after natural cooling.

[0034] 2. Electrochemical test conditions

[0035] The loading capacity of the catalyst material on the carbon cloth electrode is 0.5 mg / cm 2 , the electrolyte is 0.5M KHCO 3 (pH=7.3), CO 2 Flow rate is 5c...

Embodiment 2

[0039] 1. Preparation of graphene airgel

[0040] (1) Disperse 20mg graphene into 10mL deionized water, add 280uL (0.012mM) of nickel chloride hexahydrate and 15uL of 30wt% hydrogen peroxide, after fully stirring, 60mg of melamine foam is immersed in the above-mentioned mixed solution, and then Dry at 70°C in a vacuum box, repeat dipping-drying until the mixed solution is completely absorbed into the melamine foam, and finally the graphene airgel precursor is obtained.

[0041](2) Put the graphene airgel precursor into a quartz boat, and under the protection of inert gas Ar, heat up from room temperature to the pyrolysis temperature at a heating rate of 5°C / min, and pyrolyze at 800°C for 1 hour. Graphene airgel is obtained after natural cooling.

[0042] 2. Electrochemical test conditions

[0043] The loading capacity of the catalyst material on the carbon cloth electrode is 0.5 mg / cm 2 , the electrolyte is 0.5M KHCO 3 (pH=7.3), CO 2 Flow rate is 5cm 3 / min, room tempera...

Embodiment 3

[0047] 1. Preparation of graphene airgel

[0048] (1) Disperse 20mg graphene into 10mL deionized water, add 280uL (0.012mM) of nickel chloride hexahydrate and 15uL of 30wt% hydrogen peroxide, after fully stirring, 60mg of melamine foam is immersed in the above-mentioned mixed solution, and then Dry at 70°C in a vacuum box, repeat dipping-drying until the mixed solution is completely absorbed into the melamine foam, and finally the graphene airgel precursor is obtained.

[0049] (2) Put the graphene airgel precursor into a quartz boat, and under the protection of inert gas Ar, heat up from room temperature to the pyrolysis temperature at a heating rate of 5°C / min, and pyrolyze at a high temperature of 1000°C for 1 hour, Graphene airgel is obtained after natural cooling.

[0050] 2. Electrochemical test conditions

[0051] The loading capacity of the catalyst material on the carbon cloth electrode is 0.5 mg / cm 2 , the electrolyte is 0.5M KHCO 3 (pH=7.3), CO 2 Flow rate is 5...

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Abstract

The invention discloses a CO2 electro-reduction catalyst catalytic material and preparation and application thereof. The electro-reduction catalytic material is mainly a monoatomic catalytic materialusing a three-dimensional porous carbon aerogel as a carbon carrier, and the material is obtained through high-temperature pyrolysis synthesis, and synthetic raw materials comprise the carbon carrier(graphene and carbon nanotubes), hydrogen peroxide, chlorate, melamine foam and deionized water. The structure of the material is that metal atoms are anchored on a nitrogen-doped carbon substrate andapplied to an electroreduction carbon dioxide gas diffusion electrode. The catalyst is applied to the reaction of producing carbon monoxide by carbon dioxide electroreduction, and has good reaction activity, high CO selectivity and stable catalytic performance.

Description

technical field [0001] The invention relates to the catalytic conversion of fixed carbon dioxide gas, that is, the field of electroreduction carbon dioxide catalysis, in particular to the preparation and application of a single-atom catalyst with three-dimensional porous carbon airgel as a carbon carrier. Background technique [0002] Clean and efficient greenhouse gas CO 2 Converting them into value-added fuel chemicals can not only alleviate the energy crisis but also improve environmental problems. In recent decades, electrocatalytic reduction of CO 2 Due to the mild reaction conditions and easy regulation of the product, it has attracted extensive attention of researchers in recent years. However, due to CO 2 The combination of carbon and oxygen double bonds is stable, CO 2 The energy barrier required to activate and catalyze the conversion reaction is high. Therefore, the development of stable and efficient electrocatalytic reduction of CO 2 Catalytic materials ar...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/00C25B3/04B01J35/00B01J27/24C25B3/25
CPCC25B11/04C25B1/00B01J27/24C25B3/25B01J35/33
Inventor 刘立成牟楷文陈志鹏
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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