CN110280244A - A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof - Google Patents

A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof Download PDF

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Publication number
CN110280244A
CN110280244A CN201910643155.XA CN201910643155A CN110280244A CN 110280244 A CN110280244 A CN 110280244A CN 201910643155 A CN201910643155 A CN 201910643155A CN 110280244 A CN110280244 A CN 110280244A
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carbon dioxide
preparation
electrochemical reduction
reduction catalyst
dioxide electrochemical
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王新
王加义
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Zhaoqing South China Normal University Optoelectronics Industry Research Institute
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Zhaoqing South China Normal University Optoelectronics Industry Research Institute
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/002Mixed oxides other than spinels, e.g. perovskite
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/72Copper
    • B01J35/33
    • B01J35/39
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B3/00Electrolytic production of organic compounds
    • C25B3/20Processes
    • C25B3/25Reduction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency

Abstract

The invention belongs to the technical field of Carbon dioxide electrochemical reduction, it is specifically related to a kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof.The catalyst is copper oxide-cuprous oxide composite graphite alkene composite material.The catalyst has both high electro catalytic activity and selectivity to carbon dioxide reduction, can especially significantly improve the energy efficiency utilized to carbon dioxide;Furthermore the preparation method is easy to operate, green, yield is high, has a extensive future.

Description

A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof
Technical field
The invention belongs to the technical field of Carbon dioxide electrochemical reduction, it is specifically related to a kind of carbon dioxide electrochemistry also Raw catalyst and preparation method thereof.
Background technique
The large-scale application of fossil fuel causes the excessive emissions of carbon dioxide, since carbon dioxide increases in atmosphere And lead to global warming.To solve the above-mentioned problems, people utilize renewable resource such as solar energy, wind energy, tide energy institute Electric energy of generation etc. by carbon dioxide excessive in atmosphere through electrochemical reduction, be converted into the valuable raw material of industry such as methane, Methanol, formic acid etc., thus the method for electrochemically reducing carbon dioxide be it is a kind of cleaning, efficiently, environmental protection method.
However since carbon dioxide is one of the carbon compound of thermodynamicaHy most stable, it is translated into other carbonizations It closes object and needs high energy reducing agent or external energy source.Carbon dioxide has been reported can be by a variety of different metals such as copper, silver, tin Equal electrochemical reductions prepare carbon monoxide, methane, methanol, formic acid etc., and if metallic tin has very strong selectivity to formic acid, formic acid is produced Rate can be up to 95%, and however as the progress of reduction reaction, sheet tin electrode surface can generate metal organic complex, accelerate liberation of hydrogen Rate reduces the yield of formic acid.For another example silver catalyst is carbon monoxide selectivity with higher to carbon dioxide reduction, however Shortcoming is to need higher overpotential.It is well known that ideal elctro-catalyst needs to meet under lower overpotential, with Can higher current efficiency generates single product, therefore develop a kind of new structural catalyst and just be shown with meeting above-mentioned requirements It obtains most important.
Summary of the invention
It is an object of the invention to provide a kind of carbon dioxide electrochemical reduction catalyst for above-mentioned defect And preparation method thereof, which has both high electro catalytic activity and selectivity to carbon dioxide reduction, especially can significantly mention The energy efficiency that height utilizes carbon dioxide;Furthermore the preparation method is easy to operate, green, yield is high, has a extensive future.
The technical solution of the present invention is as follows: a kind of carbon dioxide electrochemical reduction catalyst, the catalyst is copper oxide-oxygen Change the composite material of cuprous composite graphite alkene.
The preparation method of the carbon dioxide electrochemical reduction catalyst, comprising the following steps:
(1) spray drying process prepares presoma: weigh copper chloride be dissolved in obtaining copper chloride in deionized water it is water-soluble Liquid;Under agitation, copper chloride solution is added into graphene oxide water solution, is uniformly mixing to obtain mixed solution; Mixed solution is spray-dried, product is collected, obtains presoma;
(2) calcining prepares composite material: taking step (1) to prepare resulting presoma and is laid on porcelain boat bottom, is placed in tube furnace In, it is passed through argon gas and keeps being calcined under whole argon gas, furnace cooling after calcining, collect product to get copper oxide-oxygen Change the composite material of cuprous composite graphite alkene.
Copper chloride is 0.1~0.5g in the step (1), and deionized water is 100~200mL;Graphene oxide water solution For 100~200mL, wherein graphene oxide is 1~5mg/mL using Hummer method preparation gained, concentration.
The actual conditions being spray-dried in the step (1) are as follows: 150~200 DEG C of temperature, 1~10mL/min of charging rate.
Presoma is 0.1~1g in the step (2).
Argon gas is passed through with the speed of 100~200mL/min in the step (2);The actual conditions of calcining are as follows: with 1~5 DEG C/heating rate of min is warming up to 200~300 DEG C, heat preservation 1~3 hour after the completion of heating.
The invention has the benefit that graphene and copper-based material are organically incorporated in one using spray drying by the present invention It rises, finally obtains copper oxide-cuprous oxide composite graphite alkene composite material, and by the copper oxide-cuprous oxide composite graphite The composite material of alkene is applied in carbon dioxide electro-catalysis reduction as a kind of catalyst haveing excellent performance, also to carbon dioxide Original has both high electro catalytic activity and selectivity, can especially significantly improve the energy efficiency utilized to carbon dioxide.
The precursor liquid of copper and graphene oxide dispersion are spray-dried by the catalyst with the method for spray drying, It is subsequently placed in tube furnace and is calcined under the atmosphere of argon gas, obtain copper oxide-oxygen using oxygen atom rich in graphene oxide Change cuprous composite graphite alkene material and is obtained applied to electro-catalysis carbon dioxide reduction by Effective Regulation catalyst preparation conditions High-specific surface area copper-based catalysts with special appearance and structure greatly improve contact of the carbon dioxide with catalyst and compare table Area to provide more catalytic active sites, while improving faradic efficiency.
Detailed description of the invention
Fig. 1 is that working electrode load has copper oxide described in embodiment 1-3-cuprous oxide composite graphite alkene catalyst, in CO2 The 0.5M KHCO of saturation31 hour production formic acid faradic efficiency is electrolysed in solution.It will become apparent from embodiment 1 by Fig. 1 to prepare Obtained catalyst can significantly improve faradic efficiency.
Specific embodiment
Below by embodiment, the present invention will be described in detail.
Specific step is as follows using the preparation of Hummer method for graphene oxide water solution used: taking 1g natural graphite, 23mL Dense H2SO4And 0.5gNaNO3, it pours into the three-necked flask of 250mL, is placed in ice-water bath, in 4 DEG C of 0.5h stirred below, and KMnO is added in whipping process by several times43g, after addition, insulation reaction 2h.Complete low-temp reaction.System temperature is increased To 35 DEG C, insulation reaction 3h.Medium temperature reaction is completed, system temperature is risen to 100 DEG C, and 46mL distillation is added dropwise with constant pressure funnel Water reacts 1h.Complete pyroreaction.After reaction, 70mL distilled water and 10mL hydrogen peroxide is added, persistently stirs 15min, connects Filter while hot, and product is washed till pH value close to 7 with a large amount of HCl (volume fraction 5%) and distilled water.Finally, by gained Graphite oxide is dispersed in water, and ultrasonic 8h is placed in a vacuum drying oven drying for standby.
Embodiment 1
The preparation method of the carbon dioxide electrochemical reduction catalyst, comprising the following steps:
(1) spray drying process prepares presoma: weighing 0.2g copper chloride and is dissolved in obtaining chlorine in 150mL deionized water Change copper liquor;Under agitation, copper chloride solution is added water-soluble to the graphene oxide that 150mL concentration is 2mg/mL In liquid, it is uniformly mixing to obtain mixed solution;By mixed solution temperature be 180 DEG C, charging rate be 5mL/min under conditions of into Row spray drying, collects product, obtains presoma;
(2) calcining prepares composite material: taking step (1) to prepare resulting presoma 0.3g and is laid on porcelain boat bottom, is placed in pipe It is calcined in formula furnace, argon gas is passed through with the speed of 150mL/min and keeps whole argon gas, with the heating rate liter of 2 DEG C/min Temperature is to 250 DEG C, heat preservation 2 hours after the completion of heating, and furnace cooling after calcining collects product to get copper oxide-cuprous oxide The composite material of composite graphite alkene.
Embodiment 2
The preparation method of the carbon dioxide electrochemical reduction catalyst, comprising the following steps:
(1) spray drying process prepares presoma: weighing 0.1g copper chloride and is dissolved in obtaining chlorine in 100mL deionized water Change copper liquor;Under agitation, copper chloride solution is added water-soluble to the graphene oxide that 100mL concentration is 1mg/mL In liquid, it is uniformly mixing to obtain mixed solution;By mixed solution temperature be 150 DEG C, charging rate be 1mL/min under conditions of into Row spray drying, collects product, obtains presoma;
(2) calcining prepares composite material: taking step (1) to prepare resulting presoma 0.1g and is laid on porcelain boat bottom, is placed in pipe It is calcined in formula furnace, argon gas is passed through with the speed of 100mL/min and keeps whole argon gas, with the heating rate liter of 1 DEG C/min Temperature is to 200 DEG C, heat preservation 1 hour after the completion of heating, and furnace cooling after calcining collects product to get copper oxide-cuprous oxide The composite material of composite graphite alkene.
Embodiment 3
The preparation method of the carbon dioxide electrochemical reduction catalyst, comprising the following steps:
(1) spray drying process prepares presoma: weighing 0.5g copper chloride and is dissolved in obtaining chlorine in 200mL deionized water Change copper liquor;Under agitation, copper chloride solution is added water-soluble to the graphene oxide that 200mL concentration is 5mg/mL In liquid, it is uniformly mixing to obtain mixed solution;By mixed solution temperature be 200 DEG C, charging rate be 10mL/min under conditions of It is spray-dried, collects product, obtain presoma;
(2) calcining prepares composite material: taking step (1) to prepare resulting presoma 1g and is laid on porcelain boat bottom, is placed in tubular type It is calcined in furnace, argon gas is passed through with the speed of 200mL/min and keeps whole argon gas, heated up with the heating rate of 5 DEG C/min To 300 DEG C, it is multiple to get copper oxide-cuprous oxide to collect product for heat preservation 3 hours after the completion of heating, furnace cooling after calcining Close the composite material of graphene.

Claims (6)

1. a kind of carbon dioxide electrochemical reduction catalyst, which is characterized in that the catalyst is that copper oxide-cuprous oxide is compound The composite material of graphene.
2. a kind of preparation method of carbon dioxide electrochemical reduction catalyst described in claim 1, which is characterized in that including following Step:
(1) spray drying process prepares presoma: weighing copper chloride and is dissolved in obtaining copper chloride solution in deionized water;? Under stirring condition, copper chloride solution is added into graphene oxide water solution, is uniformly mixing to obtain mixed solution;It will mixing Solution is spray-dried, and is collected product, is obtained presoma;
(2) calcining prepares composite material: taking step (1) to prepare resulting presoma and is laid on porcelain boat bottom, be placed in tube furnace, leads to Enter argon gas and keep being calcined under whole argon gas, furnace cooling after calcining, it is sub- to get copper oxide-oxidation to collect product The composite material of copper composite graphite alkene.
3. the preparation method of carbon dioxide electrochemical reduction catalyst according to claim 2, which is characterized in that the step (1) copper chloride is 0.1~0.5g in, and deionized water is 100~200mL;Graphene oxide water solution is 100~200mL, wherein Graphene oxide is 1~5mg/mL using Hummer method preparation gained, concentration.
4. the preparation method of carbon dioxide electrochemical reduction catalyst according to claim 2, which is characterized in that the step (1) actual conditions being spray-dried in are as follows: 150~200 DEG C of temperature, 1~10mL/min of charging rate.
5. the preparation method of carbon dioxide electrochemical reduction catalyst according to claim 3, which is characterized in that the step (2) presoma is 0.1~1g in.
6. the preparation method of carbon dioxide electrochemical reduction catalyst according to claim 4, which is characterized in that the step (2) argon gas is passed through with the speed of 100~200mL/min in;The actual conditions of calcining are as follows: with the heating rate liter of 1~5 DEG C/min Temperature is to 200~300 DEG C, heat preservation 1~3 hour after the completion of heating.
CN201910643155.XA 2019-07-17 2019-07-17 A kind of carbon dioxide electrochemical reduction catalyst and preparation method thereof Pending CN110280244A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111589448A (en) * 2020-06-08 2020-08-28 中国石油大学(华东) Carbon dioxide electro-reduction catalyst with ultrahigh gas phase selectivity
CN112978783A (en) * 2021-02-19 2021-06-18 中国科学技术大学 Cuprous oxide nano material, preparation method and application thereof
CN114749176A (en) * 2022-04-21 2022-07-15 昆明冶金研究院有限公司 Copper catalyst for synthesizing methyl chlorosilane and preparation method thereof

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111589448A (en) * 2020-06-08 2020-08-28 中国石油大学(华东) Carbon dioxide electro-reduction catalyst with ultrahigh gas phase selectivity
CN112978783A (en) * 2021-02-19 2021-06-18 中国科学技术大学 Cuprous oxide nano material, preparation method and application thereof
CN114749176A (en) * 2022-04-21 2022-07-15 昆明冶金研究院有限公司 Copper catalyst for synthesizing methyl chlorosilane and preparation method thereof

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Application publication date: 20190927