JPS6344945A - Method for dispersing catalyst - Google Patents
Method for dispersing catalystInfo
- Publication number
- JPS6344945A JPS6344945A JP61189868A JP18986886A JPS6344945A JP S6344945 A JPS6344945 A JP S6344945A JP 61189868 A JP61189868 A JP 61189868A JP 18986886 A JP18986886 A JP 18986886A JP S6344945 A JPS6344945 A JP S6344945A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- solvent
- water
- added
- dispersion
- 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 52
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002904 solvent Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000006185 dispersion Substances 0.000 claims abstract description 10
- 239000003960 organic solvent Substances 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 abstract description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000843 powder Substances 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010419 fine particle Substances 0.000 abstract description 2
- 229910052697 platinum Inorganic materials 0.000 abstract description 2
- 239000004094 surface-active agent Substances 0.000 abstract description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000005977 Ethylene Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- DSVGQVZAZSZEEX-UHFFFAOYSA-N [C].[Pt] Chemical compound [C].[Pt] DSVGQVZAZSZEEX-UHFFFAOYSA-N 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000003021 water soluble solvent Substances 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 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
- H01M4/8828—Coating with slurry or ink
-
- 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
- H01M4/90—Selection of catalytic material
- H01M4/92—Metals of platinum group
- H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
- H01M4/926—Metals of platinum group supported on carriers, e.g. powder carriers on carbon or graphite
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
- Inert Electrodes (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は、電極の触媒層を製準するための初期製造工
程において行なわ、ｆする触媒の分散工程の中で、水溶
性溶剤を用いる触媒の分散方法に係り。Detailed Description of the Invention [Technical Field to which the Invention Pertains] This invention relates to a method for producing a catalyst using a water-soluble solvent in an initial manufacturing process for preparing a catalyst layer of an electrode, and in a catalyst dispersion process. Concerning the method of dispersion.
特に°γシルカ１型、１１ン酸型燃料電池に用いられる
電極触媒の分散方法に関する。In particular, the present invention relates to a method for dispersing an electrode catalyst used in °γ silica type 1 and 11 phosphoric acid fuel cells.
熔料寛池は燃料の持つ化学エネルギーを直接電気エネル
ギーに変換するものであり、その構成は電Ｍ液層をはさ
んでカーボン基利上に触媒層を付着させた電極を転（１
，外部のカス供給系より前記各電極へ燃料ガスおよび酸
化剤カスを供給し、各々の市１極の触媒上で燃料カスお
よび酸化剤ガスを電気化学的に反応さぜ、その結果とし
て糸外に電気エネルギーを・古り出ず一利＜０）発電装
置ｍｌである。The smelting pond directly converts the chemical energy of fuel into electrical energy, and its structure consists of rotating electrodes with a catalyst layer attached to a carbon base with an electromagnetic liquid layer in between.
, Fuel gas and oxidant gas are supplied from an external scum supply system to each of the electrodes, and the fuel gas and oxidant gas are electrochemically reacted on the catalyst of each electrode. Electrical energy is generated by a power generation device (ml).
この電気化学的反応を効率良く行なわせるためｔこは、
ｆｔ金属微粒子をイ」着さぜた触媒と弗素樹脂からなる
電極触媒層の触媒を微細化して、触啄（固相）と反応カ
ス（気相）と電解液（液相）とが接するいわゆる３相界
面８１・古やずことか必要である。In order to carry out this electrochemical reaction efficiently,
The catalyst in the electrode catalyst layer, which consists of a catalyst on which fine metal particles have been deposited and a fluororesin, is made fine, and the so-called catalyst layer is made so that the catalyst (solid phase), the reaction residue (gas phase), and the electrolyte (liquid phase) come into contact with each other. 3-phase interface 81/Furuyazuko is necessary.
また、この微細化した触媒を３層界面の多い電極層とす
るためには、電解液に濡れやすい触媒と電解液に濡ねに
くい弗素樹脂とを均一分散させて。In addition, in order to make this finely divided catalyst into an electrode layer with many three-layer interfaces, a catalyst that is easily wetted by the electrolytic solution and a fluororesin that is not easily wetted by the electrolytic solution are uniformly dispersed.
電解液とカスの接するバランスを良好にすることが心弁
である。この１こめに触媒の分散においては分散性およ
び触媒層成形時の塗布性の面で有機溶剤を用い、特に弗
素樹脂としてディスバージョン（弗素樹脂を水溶性分散
媒に分散させたもの）を用いる場合には水浴性の有機溶
剤を用いている。The key is to maintain a good balance between the electrolyte and the waste. In this step, when dispersing the catalyst, an organic solvent is used in terms of dispersibility and coatability when forming the catalyst layer, especially when dispersion (a fluororesin dispersed in a water-soluble dispersion medium) is used as the fluororesin. A water-bathable organic solvent is used.
しかしながら、微細化した触媒は表面積が大きく触媒作
用が高いため、触媒を有機溶剤（ここでは水溶性の有機
溶剤）に分散させようとした場合、溶剤と触媒の混合初
期に充分な空気との接触が行なわｉＩるので、触媒の働
きで有機溶剤が空気中の酸素と反応し自然燃焼しやすい
という問題があった。However, since a finely divided catalyst has a large surface area and a high catalytic effect, when trying to disperse the catalyst in an organic solvent (in this case, a water-soluble organic solvent), sufficient contact with air is required at the initial stage of mixing the solvent and catalyst. Since this is carried out, there is a problem in that the organic solvent reacts with oxygen in the air due to the action of the catalyst and tends to spontaneously burn.
そのため従来は、触媒と溶剤を混合させると六に溶媒を
冷却したものを使用し、さらに触媒と溶剤接触体すは−
やく混合し触媒全体を溶剤で湿潤させることにより）、
触媒と溶剤と空気との接触度を下げるとともに触媒全体
の熱伝導を高くすることにより発火防止を行なっていた
。しかし、触媒の量が多くなると短時間に全蓄を均一混
合することが難かしいため１発火する危険性は以前とし
て高いという問題があった。Therefore, in the past, when the catalyst and solvent were mixed, a cooled solvent was used, and the catalyst and solvent contacting body was
(by mixing quickly to wet the entire catalyst with solvent),
Ignition was prevented by lowering the degree of contact between the catalyst, solvent, and air, and by increasing heat conduction throughout the catalyst. However, when the amount of catalyst increases, it is difficult to uniformly mix all the catalyst in a short period of time, so there is a problem that the risk of ignition is still high.
この発明は上述のような欠点に鑑みなさ第１たものであ
り、その目的とするところは、触媒と溶剤の混合におい
て発火の危険性を極力低下させることを目的とする。This invention is the first of its kind in view of the above-mentioned drawbacks, and its object is to reduce as much as possible the risk of ignition in mixing a catalyst and a solvent.
この目的は本発明によりば、触媒に有機溶剤を加え混合
して分散物を得る方法において、あらかじめ触媒に少量
の水を加え湿潤させることにより。This purpose is achieved according to the invention by adding a small amount of water to the catalyst and moistening it in advance in the method of adding and mixing an organic solvent to the catalyst to obtain a dispersion.
有機溶剤を混合させるときに触媒と溶剤と空気との接触
度を下げることにより達成され、る。This is achieved by reducing the degree of contact between the catalyst, solvent, and air when mixing organic solvents.
〔発明の実施例］ 」Ｊ、丁に本発明の実施例を示す。[Embodiments of the invention] ”J, Ding shows an embodiment of the present invention.
（実施例１）
白金の微粒子を１０％の割合で担持させたカーボン粉末
Ｚｏｏ Ｐ （触媒）に、０６５〜５％の界面活性剤を
含む水を１００〜２００２加え均一混合させる。次にエ
チレンジ１１コール３００ｖ〜７００１１．２加え、す
ばやく均一混合する。これをロールミル分散機により分
散し、白金カーボン粉末のエチレングリコール分散ペー
ストを得た。こねにより、発火の危険性を％〜％に小び
くできた。また添加する水は、溶剤に対し１１／３以下
の少量であるため、触媒の溶剤に対する分散性をほきん
と損なうことはない。(Example 1) To carbon powder Zoo P (catalyst) on which platinum fine particles are supported at a ratio of 10%, water containing 0.65 to 5% of a surfactant is added and mixed uniformly. Next, add 300v~70011.2 ethylene di-11col and mix quickly and uniformly. This was dispersed using a roll mill disperser to obtain an ethylene glycol dispersion paste of platinum carbon powder. By kneading, we were able to reduce the risk of ignition to %~%. Furthermore, since the amount of water added is less than 11/3 of the amount of the solvent, the dispersibility of the catalyst in the solvent is not significantly impaired.
（実施例２）
実施例１において用いるエチレンジ１１コールを１０℃
以下（０〜１０′Ｃ）に冷却し、たものを用い分散ペー
ストを得た。こねにより発火の危険性をさらに下げるこ
とができた。(Example 2) Ethylene di-11col used in Example 1 was heated at 10°C.
The mixture was cooled to a temperature below (0 to 10'C) to obtain a dispersion paste. Kneading further reduced the risk of ignition.
（実施例３）
実施例１において、雰囲気を真空度５０〜１００＊ｍｌ
（ｇとし、エチレングリコールを加大−すばやく均−混
合後、ロールミル分散機により白金カーボン粉末のエチ
レングリコール分散ペーストを得た。こねにより発火の
危険慴をさらに下げることができた。(Example 3) In Example 1, the atmosphere was set to a vacuum degree of 50 to 100*ml.
(g), and after rapidly and uniformly mixing ethylene glycol, an ethylene glycol-dispersed paste of platinum carbon powder was obtained using a roll mill disperser. By kneading, the risk of ignition could be further reduced.
く ５ ）
（実施例４）
実施例】において、雰囲気を真空度５ｆｌｌｌ〜１００
ＩＩ＋ｌＨｇとし・こねにＮ２ガスあるいは他の不活性
ガスを供給し、不活性ガス雰囲気下においてエチレンク
リコールを加えすばやく均一混合した後、ロールミル分
散機により白金カーボン粉末のエチレングリコール分散
ペーストを得た。これにより発火の危険性をさらに下げ
るこ乏ができた。5) (Example 4) In Example, the atmosphere was set to a degree of vacuum of 5 flll to 100
N2 gas or other inert gas was supplied to the kneader, and ethylene glycol was added under an inert gas atmosphere and mixed quickly and uniformly, followed by a roll mill dispersion machine to obtain an ethylene glycol-dispersed paste of platinum carbon powder. This made it possible to further reduce the risk of fire.
以上の説明から明らかなように、この発明によれば触媒
に水溶性溶剤を加える前にあらかじめ少量の水を加えて
触媒を湿潤させることにより、発火の危険性を％〜％に
小さくでき、しかも溶剤に対しへ以下の少量の水である
ため触媒の溶剤に対する分散性をほとんどそこなわず行
なうことができる。As is clear from the above explanation, according to the present invention, by adding a small amount of water to the catalyst to moisten the catalyst before adding a water-soluble solvent, the risk of ignition can be reduced to % to %. Since the amount of water is less than the amount of water in the solvent, the dispersibility of the catalyst in the solvent can be hardly impaired.
、〜〜 じＣ・,〜〜 J.C.
Claims (1)
る方法において、あらかじめ触媒に少量の水を加え湿潤
させた後、水溶性の有機溶剤を加えることを特徴とする
触媒の分散方法。 ２）特許請求の範囲第１項記載の方法において、水溶性
の有機溶剤を１０℃以下に冷却することを特徴とする触
媒の分散方法。 ３）特許請求の範囲第１項記載の方法において、触媒と
溶剤の混合を減圧空気中で行なうことを特徴とする触媒
の分散方法。 ４）特許請求の範囲第１項記載の方法において、触媒と
溶剤の混合を不活性ガスで雰囲気中で行なうことを特徴
とする触媒の分散方法。 ５）特許請求の範囲第１項記載の方法において、あらか
じめ触媒に加える水は、溶剤に対し１／３以下の量であ
ることを特徴とする触媒の分散方法。[Claims] 1) A method of obtaining a dispersion by adding and mixing a water-soluble organic solvent to a catalyst, characterized in that the catalyst is moistened by adding a small amount of water in advance, and then the water-soluble organic solvent is added. A method for dispersing catalysts. 2) A method for dispersing a catalyst according to claim 1, characterized in that the water-soluble organic solvent is cooled to 10° C. or lower. 3) A method for dispersing a catalyst according to claim 1, characterized in that the catalyst and solvent are mixed in reduced pressure air. 4) A method for dispersing a catalyst according to claim 1, characterized in that the catalyst and solvent are mixed in an inert gas atmosphere. 5) A method for dispersing a catalyst according to claim 1, wherein the amount of water added to the catalyst in advance is 1/3 or less of the amount of the solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61189868A JPS6344945A (en) | 1986-08-13 | 1986-08-13 | Method for dispersing catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61189868A JPS6344945A (en) | 1986-08-13 | 1986-08-13 | Method for dispersing catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6344945A true JPS6344945A (en) | 1988-02-25 |
Family
ID=16248514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61189868A Pending JPS6344945A (en) | 1986-08-13 | 1986-08-13 | Method for dispersing catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344945A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367913A (en) * | 1991-08-21 | 1994-11-29 | Hitachi, Ltd. | Pinion shift device for starter and assembly method of the same |
| JP2004311057A (en) * | 2003-04-02 | 2004-11-04 | Dainippon Printing Co Ltd | Paste composition for forming catalyst layer, and transfer sheet for manufacturing catalyst layer-electrolyte film laminate |
| JP2012023044A (en) * | 2011-08-26 | 2012-02-02 | Dainippon Printing Co Ltd | Method of manufacturing catalyst layer-electrolyte membrane laminate |
| JP2012059714A (en) * | 2005-09-27 | 2012-03-22 | Dainippon Printing Co Ltd | Catalyst layer-forming paste composition, transfer sheet for manufacturing catalyst layer-electrolyte membrane laminate, and catalyst layer-electrolyte membrane laminate |
| JP2015501722A (en) * | 2011-12-16 | 2015-01-19 | ビーエーエスエフ コーポレーション | Protected reduced metal catalyst |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53119290A (en) * | 1977-03-25 | 1978-10-18 | Bayer Ag | Nonnigniting metal catalyst and manufacture |
| JPS57119836A (en) * | 1980-12-29 | 1982-07-26 | Ugine Kuhlmann | Catalyst for fluorination of fatty chlorination derivative |
-
1986
- 1986-08-13 JP JP61189868A patent/JPS6344945A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53119290A (en) * | 1977-03-25 | 1978-10-18 | Bayer Ag | Nonnigniting metal catalyst and manufacture |
| JPS57119836A (en) * | 1980-12-29 | 1982-07-26 | Ugine Kuhlmann | Catalyst for fluorination of fatty chlorination derivative |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5367913A (en) * | 1991-08-21 | 1994-11-29 | Hitachi, Ltd. | Pinion shift device for starter and assembly method of the same |
| JP2004311057A (en) * | 2003-04-02 | 2004-11-04 | Dainippon Printing Co Ltd | Paste composition for forming catalyst layer, and transfer sheet for manufacturing catalyst layer-electrolyte film laminate |
| JP2012059714A (en) * | 2005-09-27 | 2012-03-22 | Dainippon Printing Co Ltd | Catalyst layer-forming paste composition, transfer sheet for manufacturing catalyst layer-electrolyte membrane laminate, and catalyst layer-electrolyte membrane laminate |
| JP2012023044A (en) * | 2011-08-26 | 2012-02-02 | Dainippon Printing Co Ltd | Method of manufacturing catalyst layer-electrolyte membrane laminate |
| JP2015501722A (en) * | 2011-12-16 | 2015-01-19 | ビーエーエスエフ コーポレーション | Protected reduced metal catalyst |
| RU2641906C2 (en) * | 2011-12-16 | 2018-01-23 | Басф Корпорейшн | Protected recovered metal catalyst |
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