CN117026259A - Electrocatalytic system for reducing carbon dioxide by gas-liquid blending based on three-dimensional porous cathode - Google Patents
Electrocatalytic system for reducing carbon dioxide by gas-liquid blending based on three-dimensional porous cathode Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 43
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000002156 mixing Methods 0.000 title claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000009792 diffusion process Methods 0.000 claims abstract description 12
- 239000003792 electrolyte Substances 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000011065 in-situ storage Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 15
- 230000003197 catalytic effect Effects 0.000 claims description 9
- 238000006722 reduction reaction Methods 0.000 abstract description 17
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 5
- 238000010531 catalytic reduction reaction Methods 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 3
- 238000011946 reduction process Methods 0.000 abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B1/00—Electrolytic production of inorganic compounds or non-metals
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- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
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- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
- C25B11/031—Porous electrodes
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- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
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Abstract
本发明公开了一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统，涉及CO2催化还原技术领域，该系统主要包括阴阳极室，三维多孔阴极、隔膜、三维多孔阳极；通过阴极室特殊流道设计使CO2与阴极电解液以气液共混形式进入阴极室；通过三维多孔阴极的设计，使该阴极具有CO2气体扩散功能且能够自发原位形成气液固三相界面，以使电催化系统能够还原气液共混中的二氧化碳；通过阴极侧极板和阳极侧极板能够形成电催化系统反应池，进行CO2还原。本发明能够兼具克服CO2的溶解度问题，克服还原过程中碳酸盐析出的问题，提高系统运行电流密度，提高CO2转化效率，最终增强体系稳定性，扩大其应用范围。
The invention discloses an electrocatalytic system for reducing carbon dioxide by gas-liquid blending based on a three-dimensional porous cathode, and relates to the technical field of CO 2 catalytic reduction. The system mainly includes a cathode and anode chamber, a three-dimensional porous cathode, a separator, and a three-dimensional porous anode; through the cathode The special flow channel design of the chamber allows CO 2 and cathode electrolyte to enter the cathode chamber in the form of gas-liquid blending; through the design of the three-dimensional porous cathode, the cathode has a CO 2 gas diffusion function and can spontaneously form a gas-liquid-solid three-phase interface in situ , so that the electrocatalytic system can reduce carbon dioxide in the gas-liquid blend; the electrocatalytic system reaction pool can be formed through the cathode side plate and the anode side plate to perform CO 2 reduction. The present invention can simultaneously overcome the solubility problem of CO 2 and the problem of carbonate precipitation during the reduction process, increase the operating current density of the system, improve the CO 2 conversion efficiency, and ultimately enhance the stability of the system and expand its application scope.
Description
技术领域Technical field
本发明涉及CO2催化还原技术领域，特别是涉及一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统。The present invention relates to the technical field of CO 2 catalytic reduction, and in particular to an electrocatalytic system for gas-liquid blend reduction of carbon dioxide based on a three-dimensional porous cathode.
背景技术Background technique
化石能源的燃烧，使大量的二氧化碳(CO2)产生并进入大气中，从而引发全球变暖、温室效应等一系列问题。The burning of fossil energy produces a large amount of carbon dioxide (CO 2 ) and enters the atmosphere, causing a series of problems such as global warming and the greenhouse effect.
通过电化学手段催化CO2发生还原反应，能够将CO2转化为有价值的燃料和化学品。在产生的一系列化学增值产品中，CO2催化还原为CO的研究受到广泛关注。Catalyzing the reduction reaction of CO 2 by electrochemical means can convert CO 2 into valuable fuels and chemicals. Among the series of chemical value-added products produced, research on the catalytic reduction of CO2 to CO has received widespread attention.
H型电解池催化还原CO2是常用的手段之一，利用H型电解池在催化还原CO2可达到很高的CO法拉第效率同时避免碳酸盐的形成。然而，H型电解池并不能在高电流密度下的达到很高的CO2还原效率。The catalytic reduction of CO 2 in H-type electrolytic cells is one of the commonly used methods. The use of H-type electrolytic cells to catalytically reduce CO 2 can achieve high CO Faradaic efficiency while avoiding the formation of carbonate. However, the H-type electrolytic cell cannot achieve high CO 2 reduction efficiency at high current density.
发明内容Contents of the invention
本发明的目的是提供一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统，旨在克服现有系统CO2的溶解度问题，克服还原过程中碳酸盐析出的问题，提高系统运行电流密度，提高CO2转化效率，最终增强体系稳定性，扩大其应用范围。The purpose of this invention is to provide an electrocatalytic system for the reduction of carbon dioxide based on a gas-liquid blend based on a three-dimensional porous cathode, aiming to overcome the solubility problem of CO2 in the existing system, overcome the problem of carbonate precipitation during the reduction process, and improve the operation of the system. current density, improve CO 2 conversion efficiency, ultimately enhance system stability and expand its application scope.
为实现上述目的，本发明提供了如下方案：In order to achieve the above objects, the present invention provides the following solutions:
一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统，包括：极板、三维多孔阴极、三维多孔阳极和隔膜；所述极板包括阴极侧极板和阳极侧极板；所述阴极侧极板与所述三维多孔阴极形成电催化系统的阴极室，所述阳极侧极板与所述三维多孔阳极形成电催化系统的阳极室；所述三维多孔阴极和所述三维多孔阳极之间有隔膜；通过所述阴极侧极板和所述阳极侧极板能够形成电催化系统反应池；An electrocatalytic system for gas-liquid blend reduction of carbon dioxide based on a three-dimensional porous cathode, including: a polar plate, a three-dimensional porous cathode, a three-dimensional porous anode and a separator; the polar plate includes a cathode side plate and an anode side plate; the The cathode side plate and the three-dimensional porous cathode form a cathode chamber of the electrocatalytic system, and the anode side plate and the three-dimensional porous anode form an anode chamber of the electrocatalytic system; the relationship between the three-dimensional porous cathode and the three-dimensional porous anode is There is a separator in between; an electrocatalytic system reaction cell can be formed through the cathode side plate and the anode side plate;
所述阴极侧极板能够使二氧化碳与阴极电解液以气液共混形式进入所述阴极室，所述阳极侧极板能够使阳极电解液进入所述阳极室，所述三维多孔阴极具有二氧化碳气体扩散功能且能够自发原位形成气液固三相界面，以使电催化系统能够还原气液共混中的二氧化碳。The cathode side plate can allow carbon dioxide and catholyte to enter the cathode chamber in the form of gas-liquid blending, the anode side plate can allow anolyte to enter the anode chamber, and the three-dimensional porous cathode has carbon dioxide gas. Diffusion function and the ability to spontaneously form a gas-liquid-solid three-phase interface in situ, so that the electrocatalytic system can reduce carbon dioxide in the gas-liquid blend.
可选地，所述阴极室和所述阳极室通过组装形成气液共混还原二氧化碳的电催化系统。Optionally, the cathode chamber and the anode chamber are assembled to form an electrocatalytic system for gas-liquid blend reduction of carbon dioxide.
可选地，所述三维多孔阴极的材料的多孔结构必须有利于气体扩散，尤其是以扩散二氧化碳为主的气体。Optionally, the porous structure of the material of the three-dimensional porous cathode must be conducive to gas diffusion, especially gases mainly diffusing carbon dioxide.
可选地，所述三维多孔阴极的材料能够自发原位创造气液固三相界面，促进电催化CO2还原的效率。Optionally, the material of the three-dimensional porous cathode can spontaneously create a gas-liquid-solid three-phase interface in situ to promote the efficiency of electrocatalytic CO 2 reduction.
可选地，所述三维多孔阴极具有承担气体扩散支撑功能和催化功能。Optionally, the three-dimensional porous cathode has a gas diffusion support function and a catalytic function.
可选地，所述三维多孔阴极的材料能够实现在CO2和电解液共混情况下，在电极表面形成大范围多位点气液固三相界面，实现高CO2还原效率。Optionally, the material of the three-dimensional porous cathode can form a large-scale multi-site gas-liquid-solid three-phase interface on the electrode surface when CO2 and electrolyte are blended, thereby achieving high CO2 reduction efficiency.
根据本发明提供的具体实施例，本发明公开了以下技术效果：According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:
与现有技术相比，本发明提供的基于三维多孔阴极的气液共混还原二氧化碳的电催化系统，因为工作过程中，阴阳极都有电解液持续通入，可以抑制碳酸(氢)盐的生成，可以在低析氢状态下稳定上百个小时，可高效抑制析氢，同时还达到高电流密度下的CO2还原效率，即本发明能够兼具克服CO2的溶解度问题，克服还原过程中碳酸盐析出的问题，提高系统运行电流密度，提高CO2转化效率，最终增强体系稳定性，扩大其应用范围。Compared with the existing technology, the electrocatalytic system for reducing carbon dioxide by gas-liquid blending based on a three-dimensional porous cathode provided by the present invention can inhibit the formation of carbonate (hydrogen) salts because during the working process, both the cathode and the anode are continuously fed with electrolyte. Generation, can be stable for hundreds of hours in a low hydrogen evolution state, can effectively suppress hydrogen evolution, and at the same time achieve CO 2 reduction efficiency under high current density, that is, the present invention can simultaneously overcome the solubility problem of CO 2 and overcome the carbon dioxide in the reduction process. Solve the problem of acid salt precipitation, increase the operating current density of the system, improve the CO 2 conversion efficiency, and ultimately enhance the stability of the system and expand its application scope.
附图说明Description of the drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the drawings of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.
图1为本发明实施例提供的一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统的示意图；Figure 1 is a schematic diagram of an electrocatalytic system for gas-liquid blending reduction of carbon dioxide based on a three-dimensional porous cathode provided by an embodiment of the present invention;
图2为本发明实施例提供的外壳主体示意图；Figure 2 is a schematic diagram of the main body of the housing provided by an embodiment of the present invention;
图3为本发明实施例提供的外壳导电极板示意图；Figure 3 is a schematic diagram of the conductive electrode plate of the shell provided by the embodiment of the present invention;
图4为本发明实施例提供的三维多孔阴极实物图；Figure 4 is a physical diagram of a three-dimensional porous cathode provided by an embodiment of the present invention;
图5为本发明实施例提供的三维多孔铜阴极SEM图；Figure 5 is an SEM image of a three-dimensional porous copper cathode provided by an embodiment of the present invention;
图6为本发明实施例提供的三维多孔银阴极SEM图；Figure 6 is an SEM image of a three-dimensional porous silver cathode provided by an embodiment of the present invention;
图7为本发明实施例提供的基于三维多孔阴极的气液共混还原二氧化碳的电催化系统的工作结果示意图。Figure 7 is a schematic diagram of the working results of the electrocatalytic system for gas-liquid blend reduction of carbon dioxide based on a three-dimensional porous cathode provided by an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.
为使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本发明作进一步详细的说明。In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.
如图1所示，本实施例提供的一种基于三维多孔阴极的气液共混还原二氧化碳的电催化系统包括：极板、三维多孔阴极5、三维多孔阳极7和隔膜6；所述极板包括阴极侧极板和阳极侧极板；所述阴极侧极板与所述三维多孔阴极5形成电催化系统的阴极室，所述阳极侧极板与所述三维多孔阳极7形成电催化系统的阳极室；所述三维多孔阴极5和所述三维多孔阳极7之间有隔膜6；通过所述阴极侧极板和所述阳极侧极板能够形成电催化系统反应池。As shown in Figure 1, this embodiment provides an electrocatalytic system for gas-liquid blending reduction of carbon dioxide based on a three-dimensional porous cathode, including: a polar plate, a three-dimensional porous cathode 5, a three-dimensional porous anode 7 and a separator 6; the polar plate It includes a cathode side plate and an anode side plate; the cathode side plate and the three-dimensional porous cathode 5 form the cathode chamber of the electrocatalytic system, and the anode side plate and the three-dimensional porous anode 7 form the electrocatalytic system. Anode chamber; there is a separator 6 between the three-dimensional porous cathode 5 and the three-dimensional porous anode 7; an electrocatalytic system reaction cell can be formed by the cathode side plate and the anode side plate.
所述阴极室和所述阳极室通过组装形成气液共混还原二氧化碳的电催化系统。The cathode chamber and the anode chamber are assembled to form an electrocatalytic system for gas-liquid blending reduction of carbon dioxide.
所述阴极侧极板能够使二氧化碳与阴极电解液以气液共混形式进入所述阴极室，所述阳极侧极板能够使阳极电解液进入所述阳极室，所述三维多孔阴极5具有二氧化碳气体扩散功能且能够自发原位形成气液固三相界面，以使电催化系统能够还原气液共混中的二氧化碳。The cathode side plate can allow carbon dioxide and catholyte to enter the cathode chamber in the form of gas-liquid blending, the anode side plate can allow anolyte to enter the anode chamber, and the three-dimensional porous cathode 5 has carbon dioxide It has gas diffusion function and can spontaneously form a gas-liquid-solid three-phase interface in situ, so that the electrocatalytic system can reduce carbon dioxide in the gas-liquid blend.
在本实施例中，所述阴极侧极板和所述阳极侧极板基本呈现对称设置，且所述阴极侧极板和所述阳极侧极板均能够持续通入电解液和气体。In this embodiment, the cathode-side plate and the anode-side plate are basically symmetrically arranged, and both the cathode-side plate and the anode-side plate can continuously pass in electrolyte and gas.
在本实施例中，所述阴极侧极板包括阴极侧外层极板1和阴极侧内层导电极板3；所述阴极侧外层极板1上设置有入口和出口，可供液体气体流入流出；所述阴极侧外层极板1与所述阴极侧内层导电极板3之间设置有胶垫2。所述阳极侧极板包括阳极侧外层极板9和阳极侧内层导电极板8；所述阳极侧外层极板9上设置有入口和出口，可供液体气体流入流出；所述阳极侧外层极板9与所述阳极侧内层导电极板8之间设置有胶垫2。In this embodiment, the cathode side plate includes a cathode side outer plate 1 and a cathode side inner conductive plate 3; the cathode side outer plate 1 is provided with an inlet and an outlet for liquid gas. Inflow and outflow; a rubber pad 2 is provided between the outer electrode plate 1 on the cathode side and the inner conductive electrode plate 3 on the cathode side. The anode-side plate includes an anode-side outer plate 9 and an anode-side inner conductive plate 8; the anode-side outer plate 9 is provided with an inlet and an outlet for the inflow and outflow of liquid gas; the anode A rubber pad 2 is provided between the side outer layer electrode plate 9 and the anode side inner layer conductive electrode plate 8 .
所述阴极侧内层导电极板3与所述三维多孔阴极5之间设置有特定形状的阴极侧垫片，防止液体泄露。所述阳极侧内层导电极板8与所述三维多孔阳极7之间同样设置有特定形状的阳极侧垫片，同样防止液体泄露。A cathode-side gasket of a specific shape is provided between the cathode-side inner conductive electrode plate 3 and the three-dimensional porous cathode 5 to prevent liquid leakage. An anode-side gasket of a specific shape is also provided between the anode-side inner conductive electrode plate 8 and the three-dimensional porous anode 7 to prevent liquid leakage.
在图1中，所述阴极侧垫片和所述阳极侧垫片均用标号4表示。外壳主体和外壳导电极板如图2和图3所示。In FIG. 1 , the cathode-side gasket and the anode-side gasket are both denoted by reference numeral 4. The main body of the shell and the conductive plate of the shell are shown in Figures 2 and 3.
所述三维多孔阴极的材料的多孔结构必须有利于气体扩散，尤其是以扩散二氧化碳为主的气体。The porous structure of the three-dimensional porous cathode material must be conducive to gas diffusion, especially the diffusion of gases mainly carbon dioxide.
所述三维多孔阴极的材料能够自发原位创造气液固三相界面，促进电催化CO2还原的效率。The material of the three-dimensional porous cathode can spontaneously create a gas-liquid-solid three-phase interface in situ to promote the efficiency of electrocatalytic CO2 reduction.
所述三维多孔阴极的材料能够实现自支撑，所述三维多孔阴极具有承担气体扩散支撑功能和催化功能。The material of the three-dimensional porous cathode can be self-supporting, and the three-dimensional porous cathode has a gas diffusion support function and a catalytic function.
所述三维多孔阴极的材料能够实现在CO2和电解液共混情况下，在电极表面形成大范围多位点气液固三相界面，实现高CO2还原效率。The material of the three-dimensional porous cathode can form a large-scale multi-site gas-liquid-solid three-phase interface on the electrode surface when CO2 and electrolyte are blended, thereby achieving high CO2 reduction efficiency.
进一步地，所述三维多孔阴极5的材料既可以是疏水性催化材料，也可以非疏水性催化材料，以疏水催化材料更为常见，包括但不限于金属多孔材料，如为铜、银或其他种催化剂为基础的电极。Furthermore, the material of the three-dimensional porous cathode 5 can be either a hydrophobic catalytic material or a non-hydrophobic catalytic material. Hydrophobic catalytic materials are more common, including but not limited to metal porous materials, such as copper, silver or other materials. catalyst-based electrode.
在本实施例中，所述三维多孔阳极7的材料既可以是疏水性催化材料，也可以非疏水性催化材料，以疏水催化材料更为常见，包括但不限于金属多孔材料，如镍、钛或其他种催化剂为基础的电极。所述阴极侧极板和所述阳极侧极板的材料包括但不限于纯钛材料。所述隔膜6为任何形式的膜。In this embodiment, the material of the three-dimensional porous anode 7 can be either a hydrophobic catalytic material or a non-hydrophobic catalytic material. Hydrophobic catalytic materials are more common, including but not limited to metal porous materials, such as nickel and titanium. or other catalyst-based electrodes. The material of the cathode side plate and the anode side plate includes but is not limited to pure titanium material. The diaphragm 6 can be any form of membrane.
在本实施例中，流入所述基于三维多孔阴极的气液共混还原二氧化碳的电催化系统的电解液为酸性电解液、碱性电解液、中性电解液中的一种。特别地，本实施例选用了中性电解液，0.1M KHCO3。In this embodiment, the electrolyte flowing into the electrocatalytic system for gas-liquid blend reduction of carbon dioxide based on a three-dimensional porous cathode is one of an acidic electrolyte, an alkaline electrolyte, and a neutral electrolyte. In particular, this embodiment uses a neutral electrolyte, 0.1M KHCO 3 .
在本实施例中，三维多孔阴极的制备方法为：将称取的2-10g铜/银粉放置平板，用刮刀压平整，厚度在0.05-0.5mm；在500-900℃的真空管式炉中烧结三小时后降温，得到多孔铜/银电极；反复冲洗干燥后得到如图4所示的三维多孔阴极。其中，三维多孔铜阴极SEM如图5所示，三维多孔银阴极SEM如图6所示。In this embodiment, the preparation method of the three-dimensional porous cathode is as follows: place 2-10g of weighed copper/silver powder on a flat plate, flatten it with a scraper to a thickness of 0.05-0.5mm; and sinter in a vacuum tube furnace at 500-900°C. After three hours, the temperature was lowered to obtain a porous copper/silver electrode; after repeated washing and drying, a three-dimensional porous cathode was obtained as shown in Figure 4. Among them, the SEM of the three-dimensional porous copper cathode is shown in Figure 5, and the SEM of the three-dimensional porous silver cathode is shown in Figure 6.
特别地，三维多孔阳极为IrOx/Ti网。In particular, the three-dimensional porous anode is an IrO x /Ti mesh.
如图7所示，本发明与现有技术相比，长时间循环时氢气很少，即可以抑制碳酸(氢)盐的生成，可以在低析氢状态下稳定上百个小时，可高效抑制析氢。As shown in Figure 7, compared with the prior art, the present invention has very little hydrogen during long-term circulation, that is, it can inhibit the generation of carbonate (hydrogen) salt, can be stable for hundreds of hours in a low hydrogen evolution state, and can effectively inhibit hydrogen evolution. .
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处。综上所述，本说明书内容不应理解为对本发明的限制。Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on its differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and the core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the present invention There will be changes in the specific implementation methods and application scope of the ideas. In summary, the contents of this description should not be construed as limitations of the present invention.
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