JPS61197034A - Preparation of catalyst supporting platinum - Google Patents
Preparation of catalyst supporting platinumInfo
- Publication number
- JPS61197034A JPS61197034A JP60038128A JP3812885A JPS61197034A JP S61197034 A JPS61197034 A JP S61197034A JP 60038128 A JP60038128 A JP 60038128A JP 3812885 A JP3812885 A JP 3812885A JP S61197034 A JPS61197034 A JP S61197034A
- Authority
- JP
- Japan
- Prior art keywords
- platinum
- acid
- preparing
- supported
- reduction
- 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.)
- Granted
Links
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
- H01M4/8842—Coating using a catalyst salt precursor in solution followed by evaporation and reduction of the 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
- H01M4/8817—Treatment of supports before application of the catalytic active composition
-
- 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
-
- 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
-
- 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)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (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、白金と担体から成る高分散白金担持触媒の
調製方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] This invention relates to a method for preparing a highly dispersed supported platinum catalyst comprising platinum and a carrier.
従来、電気化学セルに用いる白金触媒としては、周知の
方法により調製した白金黒を用いる方法が知られている
。ところが、触媒として白金黒を使用した場合には白金
比表面積が小さく、満足し得る程の特性が得ら１１．な
かった。そこで大きい比表面積を有する白金触媒を得る
ために、カーボンプラ、りなどの比較的高表面積を有す
る多孔性微粉体を担体として用いて、これに白金微粒子
を担持させる方法がとられてきた。この白金担持触媒の
調製方法の従来技術としては、大別して次の三種類の方
法がある。Conventionally, as a platinum catalyst used in an electrochemical cell, a method using platinum black prepared by a well-known method is known. However, when platinum black is used as a catalyst, the specific surface area of platinum is small, and satisfactory characteristics cannot be obtained.11. There wasn't. Therefore, in order to obtain a platinum catalyst having a large specific surface area, a method has been adopted in which a porous fine powder having a relatively high surface area, such as carbon plastic, is used as a carrier and platinum fine particles are supported on the carrier. Conventional techniques for preparing this platinum-supported catalyst can be broadly classified into the following three types.
まず第１の方法（以下気相還元法と称する）としては、
担体に塩化白金酸水溶液などの白金塩を含浸させた後に
、水分を乾燥除去し、これを水素気流中で所定の温度に
おいて直接水素還元を行なう方法が知られている。しか
しながらこの方法においては、担体の種類によっては白
金塩が担体表面に吸着されず、単に担体間の細孔あるい
は担体内の細孔に白金塩が吸収されているにすぎず、こ
れ乞乾燥する一Ｓ−こより白金塩水溶液が徐々に細孔内
で濃縮さｎ、る。この事により、白金の結晶子径が大き
くなり（白金の比表面積が減少することに相当）、期待
する程の高表面積白金触媒が得られなかった。また、白
金塩水溶液の濃縮により担体の表面に均一に白金を分散
させる事が困耐であった。更に、他の問題点としては、
乾燥された白金塩含浸漬粉体を水素気流中で直接還元し
、白金担持触媒を得るためには通常１００℃〜４００℃
の高温にしなければならない。そこで、この条件下で処
理を行なうと白金のシンタリング（白金粒子の径の増加
）が起き、更に白金比表面積が減少するという欠点があ
った。First, the first method (hereinafter referred to as gas phase reduction method) is as follows:
A method is known in which a carrier is impregnated with a platinum salt such as an aqueous solution of chloroplatinic acid, water is removed by drying, and then the carrier is directly subjected to hydrogen reduction at a predetermined temperature in a hydrogen stream. However, in this method, depending on the type of carrier, the platinum salt may not be adsorbed onto the carrier surface, but may simply be absorbed into the pores between the carriers or within the carrier, and this may require drying. The platinum salt aqueous solution is gradually concentrated within the pores. As a result, the crystallite diameter of platinum increased (corresponding to a decrease in the specific surface area of platinum), and a platinum catalyst with a high surface area as expected could not be obtained. Furthermore, it was difficult to uniformly disperse platinum on the surface of the carrier by concentrating the platinum salt aqueous solution. Furthermore, other problems include:
In order to directly reduce the dried platinum salt-impregnated powder in a hydrogen stream to obtain a platinum-supported catalyst, the temperature is usually 100°C to 400°C.
It must be heated to a high temperature. Therefore, if the treatment is carried out under these conditions, platinum sintering (increase in the diameter of platinum particles) will occur, and the platinum specific surface area will further decrease.
次に第２の方法（以下熱分解法と称する）としては、特
開昭５０−５６５４５に開示されているように、白金塩
としてジニトロジアンミン白金（）’１（ＮＨａ）ｚ（
ＮＯ２）２）を用い、これを３０％硝酸に溶解した後に
カーボンプラ、りと接触させ、充分になじませた後に乾
燥し、その後これを２６０℃空気流中で処理し、白金塩
を熱的に分解して白金担持触媒を得る方法がある。しか
しながらこの場合にも、白金塩を粉体に吸収、乾燥させ
ているために、気相還元法と同様な濃縮による白金結晶
子径の増大ある℃１は白金の分散状態の不均一さがある
。また白金塩の熱分解時には、白金のシンタリング及び
担体であるカーボンプラ、りの消失（！！化）が予想さ
れ、必ずしも期待する特性の触媒が得られな℃・と考え
られる。Next, as a second method (hereinafter referred to as thermal decomposition method), dinitrodiammine platinum()'1(NHa)z(
Using NO2)2), dissolve it in 30% nitric acid, bring it into contact with carbon plastic, let it blend well and dry it, then treat it in an air stream at 260°C to thermally remove the platinum salt. There is a method to obtain a platinum-supported catalyst by decomposing the platinum. However, in this case as well, because the platinum salt is absorbed into the powder and dried, the platinum crystallite diameter increases due to concentration similar to the gas phase reduction method. . Furthermore, during thermal decomposition of platinum salts, sintering of platinum and disappearance of carbon plastic as a carrier are expected, and it is thought that a catalyst with the expected characteristics cannot necessarily be obtained.
また第３の方法（以下気相還元法と称する）としては、
特開昭５４−９２５８８に開示されて（する様に、水に
分散させたカーボンブラックに塩化白金酸水溶液を添加
し、充分に接触させた後に、ニチオン酸ナトリウムを用
いて塩化白金酸な還元する方法がある。しかしながら、
この方法においては所定型の白金を担体上に担持させる
事が困難であり、実用的でないことが判った。The third method (hereinafter referred to as gas phase reduction method) is as follows:
As disclosed in Japanese Patent Application Laid-Open No. 54-92588, a chloroplatinic acid aqueous solution is added to carbon black dispersed in water, and after sufficient contact, the chloroplatinic acid is reduced using sodium dithionate. There is a way. However,
It was found that this method was difficult to support a predetermined type of platinum on the carrier and was not practical.
この発明は従来の欠点を除去して、白金担持触媒の調車
段階で不必要に白金の結晶子径を増加させることなく、
均一に分散した白金担持触媒を短時間で安全に、しかも
要求される白金担持量を確実に担持させる方法を提供す
ること！目的とする。This invention eliminates the conventional drawbacks, and eliminates unnecessary increases in platinum crystallite diameter at the pulley stage of platinum-supported catalysts.
To provide a method for safely supporting a uniformly dispersed platinum-supported catalyst in a short time, and moreover, reliably supporting the required amount of platinum! purpose.
この発明は、白金塩の水浴液が担体表面とより良く充分
に接触出来る様に、親水処理を施した担体と白金塩を充
分に接触させた後に、系のｐＨをアルカ１３ （ｉｌｌ
にして還元剤を用いて還元が充分起こり５る条件下にお
いて白金塩の還元を行ない、同時に担体表面上に還元さ
れた白金を吸着させる事により、白金結晶子径の小さい
高表面積高分散白金担持触媒が、確実に、安全に、しか
も短時間で調製出来るようにしたものである。In this invention, after bringing the platinum salt into sufficient contact with a hydrophilically treated carrier so that the platinum salt water bath solution can contact the carrier surface better and more fully, the pH of the system is adjusted to an alkali level of 13 (ill).
By reducing the platinum salt using a reducing agent under conditions that allow sufficient reduction to occur, and at the same time adsorbing the reduced platinum onto the surface of the carrier, a high surface area and high dispersion of platinum with a small platinum crystallite diameter can be supported. The catalyst can be prepared reliably, safely, and in a short time.
以下本発明を実施例に基づいて説明する。 The present invention will be explained below based on examples.
（実施例１） 触媒担体としてのアセチレンブラ、り９
ｔに１０ｗｔ％硝酸水溶液３６０−を添加し、これを攪
拌しながらω℃まで昇温し、更にこの温度で３時間攪拌
を続げた。３時間経過後、博別し、ｐＨニアになるまで
充分脱イオン水でケーキを洗浄した。次にこのケーキを
、 ２．１ ｆ−Ｐｔ／ｌの塩化白金酸水溶液５００
Ｍに充分に分散させ、更にアセチレンブラ、りと塩化白
金酸が充分に接触する様に２時間室温で攪拌した。これ
に０．１Ｍ疑酸ナト１１ウム水溶液を添加し、ｐＨを９
．５に調整した。この後、０．１Ｍ蟻酸水溶液２１３ｄ
を約１０分間かけて攪拌している液に滴下した。滴下完
了後、反応物を攪拌しながら上昇し、（資）℃まで昇温
した。更に昇温後、２時間加熱攪拌を続けた。その後、
反応＠を濾別し、ケーキをω℃の温水で洗浄した。洗浄
後、ケーキを５０℃で１０時間加熱真空乾燥して白金担
持触媒を得た。得られた触媒の物性を評価した結果、白
金比表面積は１８０’／７−Ｐｔ 、白金担持量は１０
００％であった。(Example 1) Acetylene resin as catalyst carrier 9
A 10 wt% nitric acid aqueous solution 360- was added to t, and the temperature was raised to ω°C while stirring, and stirring was continued at this temperature for 3 hours. After 3 hours, the cake was drained and thoroughly washed with deionized water until the pH was near. Next, this cake was mixed with 500 g of a 2.1 f-Pt/l aqueous solution of chloroplatinic acid.
The mixture was thoroughly dispersed in M and stirred at room temperature for 2 hours so that the acetylene chloride and chloroplatinic acid came into sufficient contact with each other. A 0.1M sodium chloride 11um aqueous solution was added to this, and the pH was adjusted to 9.
．． Adjusted to 5. After this, 213 d of 0.1M formic acid aqueous solution
was added dropwise to the stirring liquid over about 10 minutes. After the dropwise addition was completed, the reaction mixture was raised while stirring and the temperature was raised to (1)°C. After further raising the temperature, heating and stirring were continued for 2 hours. after that,
The reaction @ was filtered off and the cake was washed with warm water at ω°C. After washing, the cake was vacuum dried under heating at 50° C. for 10 hours to obtain a platinum-supported catalyst. As a result of evaluating the physical properties of the obtained catalyst, the platinum specific surface area was 180'/7-Pt, and the amount of platinum supported was 10
It was 00%.
なお、実施例１においては、触媒担体の親水処理に１０
ｗｔ％の硝酸水溶液を用いたが、硝酸水溶液のかわり
に１．６ ｍｏＬ’ｌの塩酸水溶液や、ＩＮの硫酸ある
いは０．ＩＮの酢酸を用いても同様の効果が得られ、他
にも本発明の要旨を逸脱しない範囲で変形がａＪ能な実
施例が種々ある。以下に第１の実施例と同様な結果が得
らｎた第１の実施例の変形例のいくつ７：Ｊ）ケ紹介す
る。In addition, in Example 1, 10
wt% nitric acid aqueous solution was used, but instead of the nitric acid aqueous solution, a 1.6 moL'l hydrochloric acid aqueous solution, IN sulfuric acid, or 0.6 moL'l nitric acid aqueous solution was used. A similar effect can be obtained by using IN acetic acid, and there are various other embodiments that can be modified without departing from the gist of the present invention. Below, some modifications of the first embodiment that obtained the same results as the first embodiment will be introduced.
１、実施例１において、担体の前処理な関℃で２時間行
なった担体な用いる。1. In Example 1, the carrier was pretreated at 50° C. for 2 hours.
２）実施例１において、ｐＨを調整するためＪこ０．Ｉ
Ｎ−へａ（ＪＨ水溶液を用いる。2) In Example 1, in order to adjust the pH, J 0. I
N-to a (using JH aqueous solution.
３、実施例１において、アンモニア水を用いてｐ）ｉ＝
９．５に調整した。3. In Example 1, p) i=
Adjusted to 9.5.
４、実施例１において、０．１Ｎｉ−蟻酸水浴液のかわ
りに０．ＩＮ−シェラ酸水溶液を使用し、ω℃で１時間
還元をする。4. In Example 1, 0.1Ni-formic acid water bath solution was replaced with 0.1Ni-formic acid water bath solution. Reduction is carried out at ω°C for 1 hour using an IN-Schelic acid aqueous solution.
５、夾施グ１１１においてｓｏ、ｔｌ’Ｊ−ホルムアル
デヒドを用いて加℃で１時間還元をする。5. In the oxidation step 111, reduction is carried out using so,tl'J-formaldehyde at a temperature of 1 hour at °C.
６、実施例１で塩化白金酸水浴液に前処理した担体を序
々に分散させるかわりに、前処理した担体を脱イオン本
釣５００ｄに分散させた後に、５ｏ；Ｖ−Ｐ ｔ／’ｙ
の塩化白金酸水溶液を十分攪拌しながら序々に添加し、
担体と白金塩な充分に接触させる。6. Instead of gradually dispersing the pretreated carrier in the chloroplatinic acid water bath solution in Example 1, after dispersing the pretreated carrier in a deionized fishing rod of 500 d, 5o;V-P t/'y
Gradually add the chloroplatinic acid aqueous solution with sufficient stirring,
Bring the carrier into sufficient contact with the platinum salt.
〔発明の効果〕
以上の説明から明らかなよう番こ、この発明番とよれば
、担体を白金塩水溶液と接触させる前に担体に親水処理
を施したために、従来より担体と白金塩との接触が良好
となり、より広−・白金比表［ｆｆｉ積を有する均−分
散白金担持触媒が得られるよ５４こなった。また、液相
還元法を採用して−するため白金塩の還元時に不必要な
熱がかからず、白金Ｑ）シンタリングが改善された。更
に、還元時に白金力Ｓ担体表面に吸着するために、白金
の分散性及び担体上への担持強度が向上した。更番こま
た、要求される白金担持触媒が一遍の工程をくり返すこ
となく得られるという効果が得られた。[Effects of the Invention] As is clear from the above explanation, according to this invention number, since the carrier was subjected to hydrophilic treatment before being brought into contact with the platinum salt aqueous solution, contact between the carrier and the platinum salt was more difficult than in the past. The results showed that a uniformly dispersed platinum-supported catalyst having a wider platinum ratio [ffi product] could be obtained. Furthermore, since a liquid phase reduction method is employed, unnecessary heat is not applied during the reduction of the platinum salt, and platinum Q) sintering is improved. Furthermore, since platinum was adsorbed onto the surface of the Platinum Power S carrier during reduction, the dispersibility of platinum and the strength of its support on the carrier were improved. Saraban also had the effect that the required platinum-supported catalyst could be obtained without repeating a single process.
Claims (1)
せた後、系のｐＨをアルカリ側にして還元剤を加え、白
金塩の還元が起こりうる条件下で還元を行なうことを特
徴とする白金担持触媒の調製方法。 ２）特許請求の範囲第１項記載の方法において、触媒担
体の親水処理に酸水溶液を用いることを特徴とする白金
担持触媒の調整方法。 ３）特許請求の範囲第２項記載の方法において、酸水溶
液酸として硝酸、塩酸、硫酸等の強酸を用いることを特
徴とする白金担持触媒の調製方法。 ４）特許請求の範囲第１項記載の方法において、処理温
度は４０℃から９０℃であることを特徴とする白金担持
触媒の調製方法。 ５）特許請求の範囲第１項に記載の方法において、ｐＨ
は９以上、好ましくは９．５以上であることを特徴とす
る白金担持触媒の調製方法。 ６）特許請求の範囲第１項記載の方法において、ｐＨ調
整試薬はＮａＯＨ、ＫＯＨ、Ｎａ＿２ＣＯ＿３、Ｋ＿２
ＣＯ＿３またはアンモニア水を用いることを特徴とする
白金担持触媒の調製方法。 ７）特許請求の範囲第１項に記載の方法において、白金
塩は塩化白金酸であることを特徴とする白金担持触媒の
調製方法。 ８）特許請求の範囲第１項に記載の方法において、還元
剤は蟻酸、ホルマリン、キ酸ナトリウム等のアルデヒド
基に相当する置換基を有する試薬であることを特徴とす
る白金担持触媒の調製方法。 ９）特許請求の範囲第１項に記載の方法において、還元
剤はヒドラジン、水素化ホウ素、ナトリウムまたはシュ
ウ酸であることを特徴とする白金担持触媒の調製方法。 １０）特許請求の範囲第１項記載の方法において、白金
塩の還元が起こりうる温度は４０℃から９０℃、好まし
くは５０℃から６０℃であることを特徴とする白金担持
触媒の調製方法。[Claims] 1) After sufficient contact between the hydrophilically treated catalyst carrier and the platinum salt, the pH of the system is brought to an alkaline level, a reducing agent is added, and the platinum salt is reduced under conditions that allow reduction of the platinum salt. A method for preparing a supported platinum catalyst, characterized by carrying out the following steps. 2) A method for preparing a platinum-supported catalyst according to claim 1, characterized in that an acid aqueous solution is used for the hydrophilic treatment of the catalyst carrier. 3) A method for preparing a supported platinum catalyst according to claim 2, characterized in that a strong acid such as nitric acid, hydrochloric acid, or sulfuric acid is used as the aqueous acid. 4) A method for preparing a supported platinum catalyst according to claim 1, characterized in that the treatment temperature is from 40°C to 90°C. 5) In the method according to claim 1, the pH
is 9 or more, preferably 9.5 or more. 6) In the method described in claim 1, the pH adjusting reagent is NaOH, KOH, Na_2CO_3, K_2
A method for preparing a supported platinum catalyst, characterized by using CO_3 or aqueous ammonia. 7) A method for preparing a supported platinum catalyst according to claim 1, wherein the platinum salt is chloroplatinic acid. 8) A method for preparing a platinum-supported catalyst according to claim 1, wherein the reducing agent is a reagent having a substituent corresponding to an aldehyde group, such as formic acid, formalin, or sodium oxate. . 9) A method for preparing a supported platinum catalyst according to claim 1, wherein the reducing agent is hydrazine, borohydride, sodium or oxalic acid. 10) A method for preparing a supported platinum catalyst according to claim 1, characterized in that the temperature at which reduction of the platinum salt can occur is from 40°C to 90°C, preferably from 50°C to 60°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60038128A JPS61197034A (en) | 1985-02-27 | 1985-02-27 | Preparation of catalyst supporting platinum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60038128A JPS61197034A (en) | 1985-02-27 | 1985-02-27 | Preparation of catalyst supporting platinum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61197034A true JPS61197034A (en) | 1986-09-01 |
| JPH04700B2 JPH04700B2 (en) | 1992-01-08 |
Family
ID=12516813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60038128A Granted JPS61197034A (en) | 1985-02-27 | 1985-02-27 | Preparation of catalyst supporting platinum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61197034A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271838A (en) * | 1988-03-31 | 1990-03-12 | Res Assoc Util Of Light Oil | Production of noble metal catalyst |
| JPH06296636A (en) * | 1993-04-12 | 1994-10-25 | Fukuji Kobayashi | Sacroiliac joint adjuster |
| EP1320140A1 (en) * | 2000-08-16 | 2003-06-18 | Matsushita Electric Industrial Co., Ltd. | Fuel cell |
| US6921604B2 (en) | 2000-02-02 | 2005-07-26 | Toyota Jidosha Kabushiki Kaisha | Device and method for evaluating performance of fuel cells, device and method for evaluating specific surface area of fuel-cell electrode catalysts, fuel-cell electrode catalyst, and method of manufacturing the same |
| JP2008517426A (en) * | 2004-12-17 | 2008-05-22 | エルジー・ケム・リミテッド | Fuel cell electrode catalyst |
| KR20140000715A (en) * | 2011-04-25 | 2014-01-03 | 유나이티드 테크놀로지스 코포레이션 | Catalyst material for fuel cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010089032A (en) * | 2008-10-09 | 2010-04-22 | Jgc Catalysts & Chemicals Ltd | Metal-particle supporting catalyst, and method of producing the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842990A (en) * | 1971-10-07 | 1973-06-21 | ||
| JPS59120250A (en) * | 1982-12-27 | 1984-07-11 | Toyota Central Res & Dev Lab Inc | Preparation of catalyst |
-
1985
- 1985-02-27 JP JP60038128A patent/JPS61197034A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4842990A (en) * | 1971-10-07 | 1973-06-21 | ||
| JPS59120250A (en) * | 1982-12-27 | 1984-07-11 | Toyota Central Res & Dev Lab Inc | Preparation of catalyst |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271838A (en) * | 1988-03-31 | 1990-03-12 | Res Assoc Util Of Light Oil | Production of noble metal catalyst |
| JPH06296636A (en) * | 1993-04-12 | 1994-10-25 | Fukuji Kobayashi | Sacroiliac joint adjuster |
| JP2681864B2 (en) * | 1993-04-12 | 1997-11-26 | 福治 小林 | Sacroiliac joint adjuster |
| US6921604B2 (en) | 2000-02-02 | 2005-07-26 | Toyota Jidosha Kabushiki Kaisha | Device and method for evaluating performance of fuel cells, device and method for evaluating specific surface area of fuel-cell electrode catalysts, fuel-cell electrode catalyst, and method of manufacturing the same |
| EP1320140A1 (en) * | 2000-08-16 | 2003-06-18 | Matsushita Electric Industrial Co., Ltd. | Fuel cell |
| EP1320140A4 (en) * | 2000-08-16 | 2007-10-10 | Matsushita Electric Ind Co Ltd | Fuel cell |
| JP2008517426A (en) * | 2004-12-17 | 2008-05-22 | エルジー・ケム・リミテッド | Fuel cell electrode catalyst |
| KR20140000715A (en) * | 2011-04-25 | 2014-01-03 | 유나이티드 테크놀로지스 코포레이션 | Catalyst material for fuel cell |
| CN103608954A (en) * | 2011-04-25 | 2014-02-26 | 联合工艺公司 | Catalyst material for fuel cell |
| EP2702625A1 (en) * | 2011-04-25 | 2014-03-05 | United Technologies Corporation | Catalyst material for fuel cell |
| EP2702625A4 (en) * | 2011-04-25 | 2014-10-01 | United Technologies Corp | Catalyst material for fuel cell |
| US9755245B2 (en) | 2011-04-25 | 2017-09-05 | Audi Ag | Catalyst material for fuel cell |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04700B2 (en) | 1992-01-08 |
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