KR20170047878A - Two-dimensional material based catalyst for high-efficient electrocatalytic co2 reduction - Google Patents
Two-dimensional material based catalyst for high-efficient electrocatalytic co2 reduction Download PDFInfo
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- KR20170047878A KR20170047878A KR1020150148511A KR20150148511A KR20170047878A KR 20170047878 A KR20170047878 A KR 20170047878A KR 1020150148511 A KR1020150148511 A KR 1020150148511A KR 20150148511 A KR20150148511 A KR 20150148511A KR 20170047878 A KR20170047878 A KR 20170047878A
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- carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/468—Iridium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/464—Rhodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/648—Vanadium, niobium or tantalum or polonium
- B01J23/6484—Niobium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/057—Selenium or tellurium; Compounds thereof
- B01J27/0573—Selenium; Compounds thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/057—Selenium or tellurium; Compounds thereof
- B01J27/0576—Tellurium; Compounds thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2231/00—Catalytic reactions performed with catalysts classified in B01J31/00
- B01J2231/60—Reduction reactions, e.g. hydrogenation
- B01J2231/62—Reductions in general of inorganic substrates, e.g. formal hydrogenation, e.g. of N2
- B01J2231/625—Reductions in general of inorganic substrates, e.g. formal hydrogenation, e.g. of N2 of CO2
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Abstract
Description
The present invention relates to a two-dimensional, single-material catalyst for carbon dioxide electro-reduction having low overcharge, low cost, and high efficiency as compared with the case of using pure metal.
In recent years, research into the development of carbon dioxide conversion technology has been actively conducted for the sustainable development of human society in preparation for global warming and resource depletion.
The carbon dioxide conversion technique can be classified into a chemical conversion technique and a biological conversion technique, and the chemical conversion technique can be classified into a thermal catalytic chemical technique, an electrochemical technique, and a photochemical conversion depending on technical characteristics.
Among them, the electrochemical conversion technique can perform a carbon dioxide reduction reaction even at normal temperature and atmospheric pressure. Especially, carbon dioxide conversion technology using electrochemistry has been extensively studied due to its high reactivity and expandability, but it is still necessary to improve the efficiency and stability of the catalyst.
On the other hand, mainly pure metal based materials have been studied as catalyst systems for converting carbon dioxide. However, it is believed that the method of using pure metal has reached a certain limit due to the limitation of electronic structural change of pure metal.
Au is used as the pure metal used for the electrochemical reduction of carbon dioxide. Although Au has a low overvoltage, it is necessary to develop a new catalyst capable of replacing the Au because of high cost.
It is an object of the present invention to provide a high-efficiency carbon dioxide reduction catalyst based on a two-dimensional single material which is excellent in reduction of carbon dioxide and low in cost compared with existing expensive Au catalysts.
The present invention provides a two-dimensional material-based catalyst for carbon dioxide reduction comprising at least one selected from IrTe 2 , NbS 2 , PFeLi, CrS 2 , CrSe 2 , RhTe 2 , and LiFeAs.
The present invention uses a specific substance having metallic properties as a catalyst for reducing carbon dioxide among the two-dimensional materials reported in the prior art, thereby greatly reducing the overcharging required for pure metals, exhibiting high catalytic performance compared to existing catalyst devices, The present invention is also effective in providing a two-dimensional single-material catalyst for reducing carbon dioxide which is more economical than a pure metal.
Figure 1 compares the electrochemical results for the carbon dioxide reduction reactions of Examples 1 to 7 and Comparative Examples 1 to 4.
Hereinafter, the present invention will be described in more detail.
Unless otherwise defined in the technical and scientific terms used in the description of the present invention, unless the context clearly dictates otherwise, those of ordinary skill in the art will readily understand the meaning of the present invention. The repeated description of the same technical structure and operation as the conventional one will be omitted.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. That is, the present invention can be variously modified and can take various forms, so that specific embodiments will be illustrated and described in detail below. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
In addition, the meaning of "comprising" as used herein embodies specified features, areas, integers, steps, operations, elements and / or components, And the like.
According to an embodiment of the present invention, there is provided a two-dimensional material-based catalyst for carbon dioxide reduction comprising at least one selected from IrTe 2 , NbS 2 , PFeLi, CrS 2 , CrSe 2 , RhTe 2 , and LiFeAs.
The present invention relates to an electrochemical catalyst composition for carbon dioxide reduction based on a two-dimensional material.
The two-dimensional material has the advantages of wide surface area and electronic structural tuning, and some of the two-dimensional materials such as MoS 2 , which have been mainly grafted to semiconductor devices, have metallic materials.
Therefore, the present invention is focused on this point, and by using metallic materials among the previously reported two-dimensional materials as a catalyst, it is possible to greatly reduce the overcharge required for pure metal, Suggest a visible system.
That is, although the two-dimensional monolayer material according to the present invention has been mainly used as an electric device, the above-described specific materials are characterized to exhibit high activity when used in an electrochemical carbon dioxide catalyst system. The present invention can provide an electrochemical catalyst having low overvoltage and excellent catalytic activity as compared with an existing pure metal based electrochemical carbon dioxide conversion catalyst system.
In addition, since the two-dimensional single material used in the present invention is cheaper than conventional expensive pure metals (for example, Au), it can be used as a catalyst for a carbon dioxide electric reduction reaction in an economical manner.
Particularly, in the case of IrTe 2 , NbS 2 , PFeLi, CrS 2 , CrSe 2 and RhTe 2 used in the present invention, the lower overcharge potential of Au, which has the highest potential for conversion of carbon dioxide to carbon monoxide among pure metal catalysts see. In addition, LiFeAs exhibits lower overpotential than the pure Cu catalyst commonly used as a catalyst for the conversion of carbon dioxide to methane. These components may be used alone or in combination in the catalyst composition.
More specifically, in the case of CrSe 2 , one of the representative two-dimensional materials, the reaction potential of the electrochemical conversion reaction of carbon dioxide to carbon monoxide can be lowered by about 0.25 V compared to the expensive Au catalyst. (-0.46 V vs. standard hydrogen electrode). In the case of LiFeAs, the electrochemical conversion of carbon dioxide to methane can also lower the reaction potential by 0.33 V compared to conventional Cu catalysts. (-0.68 V vs. standard hydrogen electrode)
Therefore, the catalyst composition according to one more preferred embodiment of the present invention may contain CrS 2 or LiFeAs, and mixtures thereof may be used.
On the other hand, the electrochemical carbon dioxide conversion reaction is a reaction in which carbon dioxide is reduced to a carbon compound through the movement of electrons by generating electric potential difference between the two electrodes by applying electric energy.
The electrochemical conversion system may comprise a reduction electrode, an oxidation electrode, and an ion exchange membrane. The ion exchange membrane may be a cation exchange membrane or an anion exchange membrane.
Except for the catalyst composition used in the present invention, the electrochemical carbon dioxide conversion reaction may include an electrolyte used in the conversion reaction and reaction conditions (pH, temperature, pressure) .
Best Mode for Carrying Out the Invention Hereinafter, the function and effect of the present invention will be described in more detail through a specific embodiment of the present invention. It is to be understood, however, that these embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention.
< Example 1 to 7>
IrTe 2 , NbS 2 , PFeLi, CrS 2 , CrSe 2 , and RhTe 2 were each used as an electric reduction catalyst of carbon dioxide to convert carbon dioxide to carbon monoxide (Examples 1 to 6). In addition, LiFeAs was used alone as an electrochemical reduction catalyst for carbon dioxide to convert carbon dioxide to methane (Example 7).
< Comparative Example 1 to 4>
In addition, Zn, Ag, and Au, which are conventionally used, were used alone as an electrochemical reduction catalyst for carbon dioxide to convert carbon dioxide to carbon monoxide (Comparative Examples 1 to 3). In addition, Cu was used alone as an electrochemical reduction catalyst for carbon dioxide to convert carbon dioxide to methane (Comparative Example 4).
At this time, the conditions of the electrochemical carbon dioxide conversion reaction were carried out by a general method except for the catalyst.
The results of the electrochemical reduction of carbon dioxide in the above Examples and Comparative Examples are shown in Fig.
Referring to FIG. 1, Examples 1 to 6 of the present invention show that the overcharge is generally lower than that of Comparative Examples 1 to 3 using pure metals. Particularly, in the case of CrSe 2 (Example 5), which is one of the two-dimensional materials, the reaction potential of the electrochemical conversion of carbon dioxide to carbon monoxide could be lowered by 0.25 V compared to the expensive Au (Comparative Example 3) catalyst. (-0.46 V vs. standard hydrogen electrode)
Also, in the case of LiFeAs (Example 7), the reaction potential of the electrochemical conversion reaction of carbon dioxide to methane could be lowered by 0.33 V compared to the conventional Cu (Comparative Example 4) catalyst. (-0.68 V vs. standard hydrogen electrode)
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. And falls within the scope of the present invention.
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| KR1020150148511A KR20170047878A (en) | 2015-10-26 | 2015-10-26 | Two-dimensional material based catalyst for high-efficient electrocatalytic co2 reduction |
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| KR1020150148511A KR20170047878A (en) | 2015-10-26 | 2015-10-26 | Two-dimensional material based catalyst for high-efficient electrocatalytic co2 reduction |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180116196A (en) * | 2018-10-17 | 2018-10-24 | 한국생산기술연구원 | Supported transition metal selenide catalyst, process for producing same, and process for producing urethane using same |
| CN110721712A (en) * | 2019-11-22 | 2020-01-24 | 山东大学 | Iron phosphate catalyst with three-level hierarchical structure, and preparation method and application thereof |
-
2015
- 2015-10-26 KR KR1020150148511A patent/KR20170047878A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180116196A (en) * | 2018-10-17 | 2018-10-24 | 한국생산기술연구원 | Supported transition metal selenide catalyst, process for producing same, and process for producing urethane using same |
| CN110721712A (en) * | 2019-11-22 | 2020-01-24 | 山东大学 | Iron phosphate catalyst with three-level hierarchical structure, and preparation method and application thereof |
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