JPS632259A - Catalyst supporting method to gas diffusion electrode - Google Patents
Catalyst supporting method to gas diffusion electrodeInfo
- Publication number
- JPS632259A JPS632259A JP61144443A JP14444386A JPS632259A JP S632259 A JPS632259 A JP S632259A JP 61144443 A JP61144443 A JP 61144443A JP 14444386 A JP14444386 A JP 14444386A JP S632259 A JPS632259 A JP S632259A
- Authority
- JP
- Japan
- Prior art keywords
- reaction layer
- catalyst
- gas diffusion
- hydrophilic
- diffusion electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 29
- 238000009792 diffusion process Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 239000006229 carbon black Substances 0.000 claims abstract description 19
- 150000002736 metal compounds Chemical class 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims abstract description 13
- 239000008151 electrolyte solution Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 4
- 230000003213 activating effect Effects 0.000 claims abstract 2
- 239000005871 repellent Substances 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 11
- 239000003792 electrolyte Substances 0.000 abstract description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 241000872198 Serjania polyphylla Species 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8825—Methods for deposition of the catalytic active composition
- H01M4/8846—Impregnation
- H01M4/885—Impregnation followed by reduction of the catalyst salt precursor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/88—Processes of manufacture
- H01M4/8878—Treatment steps after deposition of the catalytic active composition or after shaping of the electrode being free-standing body
- H01M4/8882—Heat treatment, e.g. drying, baking
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、燃料電池、二次電池、電気化学的リアクター
等に用いるガス拡散電極への触媒担持方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for supporting a catalyst on a gas diffusion electrode used in fuel cells, secondary batteries, electrochemical reactors, and the like.
（従来の技術）
従来のガス拡散電極は、親水部とｔθ水部とから成る反
応層のみから成るものと、この反応層に撥水性のガス拡
散層を接合して成るものとがある。(Prior Art) Conventional gas diffusion electrodes include those consisting only of a reaction layer consisting of a hydrophilic portion and a tθ water portion, and those consisting of a water-repellent gas diffusion layer bonded to this reaction layer.
これらのガス拡散電極の反応層に触媒を担持するには、
従来触媒金属化合物溶液を反応層に塗布し、反応層中の
親水部に含浸させていた。To support the catalyst in the reaction layer of these gas diffusion electrodes,
Conventionally, a catalytic metal compound solution was applied to the reaction layer and impregnated into the hydrophilic areas in the reaction layer.
（発明が解決しようとする問題点）
ところが、反応層中の親水部を構成している親水性カー
ボンブラックの触媒金属化合物溶液に触れる表面は、完
全な親水性ではなく、製造上、取扱上から超微細な不純
物、油脂、ゴミ等の付着により、或いはガス等に触れて
部分的に親水性がそう失している。その為、反応層中の
親水部に含浸させた触媒金属化合物溶液は親水性カーボ
ンブラックの表面に触れても完全に濡れず、触媒金属化
合物溶液を乾燥分解、還元して触媒を担持すると、細か
く分散せず、部分的に大きく凝集する。従って、触媒と
しての性能が十分に得られず、燃料電池、二次電池等に
使用した際、ガス拡散電極の反応層中での電解液とガス
との反応が遅く、充電及び放電効率が低いものである。(Problem to be Solved by the Invention) However, the surface of the hydrophilic carbon black that makes up the hydrophilic part in the reaction layer, which comes into contact with the catalytic metal compound solution, is not completely hydrophilic, and due to manufacturing and handling considerations, Hydrophilicity is partially lost due to the adhesion of ultrafine impurities, oils and fats, dust, etc., or due to contact with gas, etc. Therefore, the catalytic metal compound solution impregnated into the hydrophilic part of the reaction layer does not completely wet the surface of the hydrophilic carbon black even if it touches the surface, and when the catalytic metal compound solution is dried and decomposed and reduced to support the catalyst, It does not disperse and is agglomerated in some areas. Therefore, sufficient performance as a catalyst cannot be obtained, and when used in fuel cells, secondary batteries, etc., the reaction between the electrolyte and gas in the reaction layer of the gas diffusion electrode is slow, resulting in low charging and discharging efficiency. It is something.
そこで本発明は、ガス拡散電極の反応層中の親水部に含
浸させた触媒金属化合物溶液が親水性カーボンブラック
表面に触れると完全に濡れて、触媒金属化合物溶液を乾
燥分解、還元することにより、触媒が細かく分散して担
持されるようにしたガス拡散電極への触媒担持方法を提
供しようとするものである。Therefore, in the present invention, when the catalytic metal compound solution impregnated into the hydrophilic part in the reaction layer of the gas diffusion electrode touches the hydrophilic carbon black surface, the catalytic metal compound solution completely wets the surface, and the catalytic metal compound solution is decomposed and reduced by drying. The present invention aims to provide a method for supporting a catalyst on a gas diffusion electrode in which the catalyst is supported in a finely dispersed manner.
（問題点を解決するための手段）
上記問題点を解決するための本発明のガス拡散電極への
触媒担持方法は、親水部と撥水部から成る反応層を有す
るガス拡散電極に触媒を担持するに於いて、ガス拡散電
極を電解質溶液で電解して、反応層中の親水部の電解質
溶液に触れた親水カーボンブラックを活性化処理し、然
る後反応層中に触媒金属化合物溶液を含浸させ、乾燥分
解、還元を行って触媒を担持することを特徴とするもの
である。(Means for Solving the Problems) In order to solve the above problems, the method of supporting a catalyst on a gas diffusion electrode of the present invention is to support a catalyst on a gas diffusion electrode having a reaction layer consisting of a hydrophilic part and a water repellent part. In this process, the gas diffusion electrode is electrolyzed with an electrolyte solution to activate the hydrophilic carbon black that has come into contact with the electrolyte solution in the hydrophilic part of the reaction layer, and then the reaction layer is impregnated with a catalytic metal compound solution. It is characterized by supporting the catalyst by dry decomposition and reduction.
（作用）
上記ように本発明のガス拡散電極への触媒担持方法は、
ガス拡散電極を電解質溶液中で電解して、反応層中の親
水部の電解質溶液に触れた親水性カーボンブラックを活
性化処理するので、電解質溶液に触れた親水性カーボン
ブラックの表面に水酸基が結合されて完全に親水性とな
る。従って、その後反応層に触媒金属化合物溶液を含浸
させ、乾燥分解、還元を行うことにより、触媒が細か（
分散して、触媒金属化合物溶液に触れた表面に全て略均
−な厚さで担持されることとなって触媒としての性能が
向上する。(Function) As described above, the method for supporting a catalyst on a gas diffusion electrode of the present invention is as follows:
The gas diffusion electrode is electrolyzed in an electrolyte solution to activate the hydrophilic carbon black that has come into contact with the electrolyte solution in the hydrophilic part of the reaction layer, so hydroxyl groups are bonded to the surface of the hydrophilic carbon black that has come into contact with the electrolyte solution. completely hydrophilic. Therefore, by impregnating the reaction layer with a catalytic metal compound solution and performing dry decomposition and reduction, the catalyst becomes fine (
It is dispersed and supported on the surface that has come into contact with the catalytic metal compound solution with a substantially uniform thickness, thereby improving the performance as a catalyst.
（実施例）
本発明によるガス拡散電極への触媒担持方法の一実施例
について説明すると、平均粒径４２０人の親水性カーボ
ンブラックと平均粒径４２０人の撥水性カーボンブラッ
クと平均粒径０．３μのポリ四弗化エチレン粉末とが１
：４：４の割合で混合、成形されて成る厚さ０．１ｍｍ
、幅１００ｍｍ、長さ１００關の反応層に、平均粒径４
２０人の撥水性カーボンブラックと平均粒径Ｑ、３μの
ポリ四弗化エチレン粉末とが７：３の割合で混合成形さ
れて成る厚さ０．４ｍｍ、幅１２０ｎ、長さ１２０ｎ＋
のガス拡散層を接合したガス拡散電極を、２０％ＫＯＨ
中で、１．５■、５分間電解して、前記反応層中の親水
性カーボンブラックのＫＯＨに触れた表面を活性化処理
して、その表面に一〇Ｈ基を結合し、完全に親水性とな
した。よく水洗後反応層中に塩化白金酸（ＨｚＰ ｔＣ
１６）と水とイソプロピルアルコールとの混合液を塗布
して含浸させ、２００℃、１２０分間乾燥分解、Ｈ２中
２００℃、２ｈｒ還元を行ったところ、粒径２０〜３０
人の白金が細かく分散して、前記混合液に触れた親水性
カーボンブラックの表面に担持された。(Example) An example of the method for supporting a catalyst on a gas diffusion electrode according to the present invention will be described. Hydrophilic carbon black with an average particle size of 420 mm, water-repellent carbon black with an average particle size of 420 mm, and water-repellent carbon black with an average particle size of 0.5 mm. 3μ polytetrafluoroethylene powder and 1
:Mixed and molded in a ratio of 4:4, thickness 0.1mm
, a reaction layer with a width of 100 mm and a length of 100 mm, with an average particle size of 4
20 water-repellent carbon black and polytetrafluoroethylene powder with an average particle size Q of 3μ are mixed and molded in a ratio of 7:3, with a thickness of 0.4mm, width of 120n, and length of 120n+.
A gas diffusion electrode with a gas diffusion layer of 20% KOH
The surface of the hydrophilic carbon black in the reaction layer that came in contact with KOH was electrolyzed for 1.5 seconds for 5 minutes, and the surface of the hydrophilic carbon black that came in contact with KOH was activated, and 10H groups were bonded to the surface, making it completely hydrophilic. It was made into a sex. After washing well with water, add chloroplatinic acid (HzP tC) to the reaction layer.
16), water and isopropyl alcohol to impregnate it, dry decomposition at 200℃ for 120 minutes, and reduction in H2 at 200℃ for 2 hours, the particle size was 20-30.
Human platinum was finely dispersed and supported on the surface of the hydrophilic carbon black that came into contact with the mixture.
尚、上記実施例に於けるガス拡散電極は、反応層にガス
拡散層を接合したものであるが、反応層のみより成るガ
ス拡散電極でも良い。また担持する触媒は、白金に限る
ものではなく、他の白金族金属及び金銀であっても良い
ものである。Although the gas diffusion electrode in the above embodiment is one in which a gas diffusion layer is bonded to a reaction layer, a gas diffusion electrode consisting only of a reaction layer may also be used. Further, the supported catalyst is not limited to platinum, and may be other platinum group metals or gold and silver.
（発明の効果）
以上の説明で判るように本発明のガス拡散電極への触媒
担持方法によれば、ガス拡散電極の反応層中の親水部親
水性カーボンブラックの表面に、触媒を均一に細かく分
散して担持させることができるので、得られるガス拡散
電極の反応層中の触媒の性能が向上し、燃料電池、二次
電池等に使用した場合反応層中での電解液とガスとの反
応あるいは電解液の分解反応が活発に行われて反応速度
が著しく早くなり、充電及び放電効率が高くなるという
効果を奏する。(Effects of the Invention) As can be seen from the above explanation, according to the method of supporting a catalyst on a gas diffusion electrode of the present invention, the catalyst is uniformly and finely deposited on the surface of the hydrophilic carbon black in the hydrophilic portion in the reaction layer of the gas diffusion electrode. Since it can be dispersed and supported, the performance of the catalyst in the reaction layer of the resulting gas diffusion electrode is improved, and when used in fuel cells, secondary batteries, etc., the reaction between the electrolyte and gas in the reaction layer is improved. Alternatively, the decomposition reaction of the electrolytic solution is actively carried out, the reaction rate is significantly increased, and charging and discharging efficiency is improved.
出願人 田中貴金属工業株式会社 木尾 哲 置屋 長−Applicant: Tanaka Kikinzoku Kogyo Co., Ltd. Satoshi Kio Okiya chief
Claims (1)
触媒を担持するに於いて、ガス拡散電極を電解質溶液中
で電解して、反応層中の親水部の電解質溶液に触れた親
水性カーボンブラックを活性化処理し、然る後反応層中
に触媒金属化合物溶液を含浸させ、乾燥分解、還元を行
って触媒を担持することを特徴とするガス拡散電極への
触媒担持方法。When supporting a catalyst on a gas diffusion electrode that has a reaction layer consisting of a hydrophilic part and a water-repellent part, the gas diffusion electrode is electrolyzed in an electrolyte solution, and the hydrophilic part in the reaction layer is exposed to the electrolyte solution. 1. A method for supporting a catalyst on a gas diffusion electrode, which comprises activating carbon black, impregnating a catalyst metal compound solution into a reaction layer, drying, decomposing and reducing the catalyst to support the catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61144443A JPS632259A (en) | 1986-06-20 | 1986-06-20 | Catalyst supporting method to gas diffusion electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61144443A JPS632259A (en) | 1986-06-20 | 1986-06-20 | Catalyst supporting method to gas diffusion electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS632259A true JPS632259A (en) | 1988-01-07 |
Family
ID=15362336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61144443A Pending JPS632259A (en) | 1986-06-20 | 1986-06-20 | Catalyst supporting method to gas diffusion electrode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS632259A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5186734A (en) * | 1974-12-18 | 1976-07-29 | United Technologies Corp | |
| JPS5983352A (en) * | 1982-11-05 | 1984-05-14 | Nissan Motor Co Ltd | Manufacture of electrode for fuel cell |
-
1986
- 1986-06-20 JP JP61144443A patent/JPS632259A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5186734A (en) * | 1974-12-18 | 1976-07-29 | United Technologies Corp | |
| JPS5983352A (en) * | 1982-11-05 | 1984-05-14 | Nissan Motor Co Ltd | Manufacture of electrode for fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3912538A (en) | Novel composite fuel cell electrode | |
| US3248267A (en) | Catalytic electrode and fuel cell containing the same | |
| US3899354A (en) | Gas electrodes and a process for producing them | |
| JPH0774469B2 (en) | Electrocatalytic gas diffusion electrode and method of making the same | |
| US3549423A (en) | Method for manufacturing foam type electrode | |
| US3258363A (en) | Carbonized polyvinylidenechloride fuel cell electrode | |
| CN100341181C (en) | Catalyst for fuel cell and fuel cell comprising the same | |
| US20060287194A1 (en) | Electrode for solid polymer type fuel cell and manufacturing method therefor | |
| US5538585A (en) | Process for producing gas electrode | |
| CN106159286B (en) | A kind of modified electrode and preparation method thereof applied to zinc-bromine flow battery | |
| CA2465654A1 (en) | Electrophoretically deposited hydrophilic coatings for fuel cell diffuser/current collector | |
| US3212936A (en) | Method of forming paste-form fuel cell electrode | |
| CN105289591A (en) | Preparation method of nano carbon based loaded two-dimensional noble metal cluster composite material | |
| RU2563029C2 (en) | Method of preparing membrane-electrode units | |
| JPS632259A (en) | Catalyst supporting method to gas diffusion electrode | |
| JPH08162124A (en) | Manufacture of gas diffusion electrode | |
| US3171757A (en) | Fuel cell electrodes and method of making the same | |
| US3594236A (en) | Method for preparing an air breathing electrode | |
| US4873121A (en) | Cathode/membrane assembly and method of making same | |
| KR860700273A (en) | Complex Catalytic Substance for Electrolytic Electrode and Method of Manufacturing the Same | |
| US3522094A (en) | Electrode including hydrophobic polymer,method of preparation and fuel cell therewith | |
| JPS59127372A (en) | Electrode for fuel cell | |
| US3737344A (en) | Process for increasing the activity of porous fuel cell electrodes | |
| RU2343600C1 (en) | Device for catalytic gas recombination in alkaline accumulator with short zinc anode | |
| RU2074459C1 (en) | Electrochemical cell gas-diffusion electrode |