JPH0479161A - Manufacture of platinum alloy catalyst - Google Patents
Manufacture of platinum alloy catalystInfo
- Publication number
- JPH0479161A JPH0479161A JP2194351A JP19435190A JPH0479161A JP H0479161 A JPH0479161 A JP H0479161A JP 2194351 A JP2194351 A JP 2194351A JP 19435190 A JP19435190 A JP 19435190A JP H0479161 A JPH0479161 A JP H0479161A
- Authority
- JP
- Japan
- Prior art keywords
- platinum
- carried
- catalyst
- auxiliary component
- platinum alloy
- 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 56
- 229910001260 Pt alloy Inorganic materials 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 26
- 229910052742 iron Inorganic materials 0.000 abstract description 12
- 239000000446 fuel Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000012495 reaction gas Substances 0.000 abstract description 2
- MMNSHNBVSJFTNA-UHFFFAOYSA-N 1h-phosphole-2-carboxylic acid Chemical compound OC(=O)C1=CC=CP1 MMNSHNBVSJFTNA-UHFFFAOYSA-N 0.000 abstract 1
- 238000005275 alloying Methods 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- LDHMAVIPBRSVRG-UHFFFAOYSA-O 1-methylnicotinamide Chemical compound C[N+]1=CC=CC(C(N)=O)=C1 LDHMAVIPBRSVRG-UHFFFAOYSA-O 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- -1 chlorine ions Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000002050 diffraction method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 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
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- 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
- Inert Electrodes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は燃料電池用白金合金触媒の製造方法に係り、
特に燃料電池特性と信鎖性に優れる白金合金触媒の製造
方法に関する。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a method for producing a platinum alloy catalyst for fuel cells,
In particular, it relates to a method for producing a platinum alloy catalyst that has excellent fuel cell properties and reliability.
燃料電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、その構成は第２図に示すよ
うな電極６を例えばリン酸よりなる電解液層８をはさん
で配置し、外部のガス供給系より前記各電極へ燃料ガス
及び酸化剤ガスを供給し、各電極の電極触媒上で燃料ガ
ス及び酸化剤ガスを電気化学的に反応させ、その結果と
して系外に電気エネルギーを取り出す発電装置の一種で
ある。A fuel cell directly converts the chemical energy of fuel into electrical energy, and its configuration is as shown in Figure 2, in which electrodes 6 are placed across an electrolyte layer 8 made of, for example, phosphoric acid, and an external Power generation in which fuel gas and oxidant gas are supplied from the gas supply system to each of the electrodes, the fuel gas and oxidant gas are electrochemically reacted on the electrode catalyst of each electrode, and as a result, electrical energy is taken out of the system. It is a type of device.
電極６は多孔質のカーボン基材４の上に電極触媒層５を
付着させて構成される。電極触媒層５は触媒担体２の表
面に触媒１を担持させてからフッ素樹脂の微粒子３によ
り結着して形成される。この電極触媒層５の内部ではカ
ーボン基材側からのガスと電解液層からの電解液とが接
触し、３相界面が形成され、電気化学的反応が進行する
。シリコンカーバイト微粒子９は電解液８を保持する。The electrode 6 is constructed by depositing an electrode catalyst layer 5 on a porous carbon base material 4. The electrode catalyst layer 5 is formed by supporting the catalyst 1 on the surface of the catalyst carrier 2 and then binding it with fine particles 3 of fluororesin. Inside this electrode catalyst layer 5, the gas from the carbon base material side and the electrolytic solution from the electrolytic solution layer come into contact, a three-phase interface is formed, and an electrochemical reaction progresses. Silicon carbide fine particles 9 hold electrolyte 8 .
この電気化学的反応を効率良く行わせるためには、電極
触媒層内の触媒粒子と電解液とガスが接する３相界面を
多くするとともに触媒粒子の活性を高くする必要がある
。３相界面を多くするために触媒１の粒子径を小さくし
て触媒表面積を大きくしている。また、触媒の活性を高
くするために、たとえばリン酸型燃料電池の場合、白金
合金を用いることにより活性を高めている。In order to carry out this electrochemical reaction efficiently, it is necessary to increase the number of three-phase interfaces where the catalyst particles, electrolyte, and gas in the electrode catalyst layer are in contact with each other, and to increase the activity of the catalyst particles. In order to increase the number of three-phase interfaces, the particle size of the catalyst 1 is decreased to increase the catalyst surface area. Furthermore, in order to increase the activity of the catalyst, for example, in the case of a phosphoric acid fuel cell, a platinum alloy is used to increase the activity.
白金合金触媒はカーボンブラック触媒担体に５〜２０重
量％の割合で担持して用いられる。従来は塩化白金酸溶
液中で塩化白金酸を還元してカーボン触媒担体の上に白
金を析出させ、次いで硝酸鉄溶液中で硝酸鉄を還元して
鉄をカーボン担体上に析出させ、続いて８００〜９００
℃の温度で１〜２ｈ熱処理してカーボン触媒担体上に担
持された微細な白金合金触媒を得ていた。主成分である
白金と合金化される副成分は鉄の他、ニッケル等の遷移
金属元素が用いられる。The platinum alloy catalyst is used by being supported on a carbon black catalyst carrier in a proportion of 5 to 20% by weight. Conventionally, chloroplatinic acid is reduced in a chloroplatinic acid solution to precipitate platinum onto a carbon catalyst support, then iron nitrate is reduced in an iron nitrate solution to deposit iron onto a carbon support, and then 800% ~900
A fine platinum alloy catalyst supported on a carbon catalyst carrier was obtained by heat treatment at a temperature of 1 to 2 hours. In addition to iron, transition metal elements such as nickel are used as subcomponents that are alloyed with platinum, which is the main component.
しかしながら上述のような従来の白金合金触媒の製法に
おいては、副成分の全てが完全に白金と合金化している
わけではなく製造条件のばらつき等によって一部が未反
応のまま遊離して残存している。このような未反応の副
成分は触媒の活性を高める効果がないばかりでなく、電
解液であるリン酸と反応してリン化物となったり、酸溶
解のあとリン化物となって再析出したりして、ガス拡散
を阻害しあるいは電極触媒層の撥水性を低下させ、その
結果燃料電池の特性と信転性を低下させるという問題が
あった。However, in the conventional method for manufacturing platinum alloy catalysts as described above, not all of the subcomponents are completely alloyed with platinum, and due to variations in manufacturing conditions, some may remain unreacted and liberated. There is. Such unreacted subcomponents not only have no effect on increasing the activity of the catalyst, but also react with the electrolyte phosphoric acid to form phosphides, or may redeposit as phosphides after acid dissolution. This poses a problem in that gas diffusion is inhibited or the water repellency of the electrode catalyst layer is reduced, resulting in a reduction in the characteristics and reliability of the fuel cell.
未反応の副成分が残らないようにするために熱処理温度
を高めたり、反応時間を長くしたりして製造条件のばら
つきの影響をなくそうとすると触媒粒子径が成長して大
きくなり、白金合金触媒の触媒活性が失われてしまう。If an attempt is made to eliminate the effects of variations in manufacturing conditions by increasing the heat treatment temperature or lengthening the reaction time in order to prevent unreacted subcomponents from remaining, the catalyst particle size will grow and become larger. The catalytic activity of the catalyst is lost.
この発明は上述の点に鑑みてなされ、その目的は白金合
金触媒の粒子径は小さくし、かつ未反応の副成分が残存
しないようにして、特性と信鯨性に優れる白金合金触媒
の製造方法を提供することにある。This invention was made in view of the above-mentioned points, and its purpose is to reduce the particle size of the platinum alloy catalyst and to prevent unreacted subcomponents from remaining, thereby producing a platinum alloy catalyst with excellent properties and reliability. Our goal is to provide the following.
Ｃ！１ａを解決するための手段〕
上述の目的はこの発明によれば
第一工程と、第二工程と、第三工程と、第四工程とを有
し、
第一工程は、カーボン触媒担体の上に主成分である白金
を担持する工程であり、
第二工程はカーボン触媒担体の上に副−成分を担持する
工程であり、
第三工程は熱処理によって前記担持された白金と副成分
とを合金化し、
第四工程は未反応副成分を除去する工程であるとするこ
とにより達成される。C! Means for Solving 1a] According to the present invention, the above-mentioned object has a first step, a second step, a third step, and a fourth step, and the first step is to The second step is to support the sub-components on the carbon catalyst carrier, and the third step is to alloy the supported platinum and the sub-components by heat treatment. The fourth step is a step of removing unreacted by-components.
第四工程ははアルカリ洗浄、酸洗浄等の工程を用いるこ
とができる。In the fourth step, steps such as alkaline cleaning and acid cleaning can be used.
反応条件のばらつき等で未反応副成分が残存しても第四
工程で除去される。Even if unreacted subcomponents remain due to variations in reaction conditions, they are removed in the fourth step.
次にこの発明の実施例を図面に基いて説明する。 Next, embodiments of the present invention will be described based on the drawings.
アセチレンブラック５ｏｏｏ ｇを超音波を用いて４０
０１の水に充分分散させる。金属として２０００ ｇの
白金を含有する塩化白金酸の水溶液２００１を添加して
充分攪拌する。０．１ ＭＮａ＊ＣＯａ水溶液１９５１
を加え、約２ｈかけて５５℃に昇温させる。３０重量％
の過酸化水素水１０．７１を加え、０．２Ｍギ酸水溶液
２０５１を５ｈかけて添加する。反応が終了してからケ
ーキをろ別し、塩素イオンが検出されなくなるまで充分
に洗浄する。 ５０℃で真空乾燥して、２０重量％の白
金が担持された触媒担体が得られる。40g of acetylene black using ultrasound
Thoroughly disperse in 01 water. An aqueous solution 2001 of chloroplatinic acid containing 2000 g of platinum as metal is added and thoroughly stirred. 0.1 MNa*COa aqueous solution 1951
was added, and the temperature was raised to 55°C over about 2 hours. 30% by weight
10.71 liters of hydrogen peroxide solution was added, and 2051 liters of 0.2M formic acid aqueous solution was added over 5 hours. After the reaction is complete, filter the cake and wash thoroughly until no chlorine ions are detected. By vacuum drying at 50° C., a catalyst carrier on which 20% by weight of platinum is supported is obtained.
次にこの触媒担体５０００ ｇを０．０１ Ｍ Ｆｅ（
ＮＯｓ）ｓ水溶液３８０１に分散させ、５０℃で１ｈ攪
拌する。これは白金合金組成として鉄４２．８原子％に
相当する。攪拌を続けながら、０．１％Ｎ８４０Ｂ水溶
液２４０１を２０ｈかけて滴加する。このとき水酸化鉄
Ｆｅ （ＯＨ） ｓが触媒担体上に析出する。固形物を
吸引ろ過し、水洗し５０℃で真空乾燥する。粉砕して電
気炉に入れ、窒素ガスに７％の水素ガスを含む混合ガス
を流し２００〜３５０℃の温度で１ｈ加熱する。このと
き鉄は完全に還元される０以上の工程で得られた白金と
鉄の担持された触媒担体を赤外線瞬間加熱装置に装填し
、炉内の酸素を除去するために１５ｍ１ｎ。Next, 5000 g of this catalyst carrier was mixed with 0.01 M Fe (
Disperse in NOs)s aqueous solution 3801 and stir at 50°C for 1 hour. This corresponds to 42.8 atomic percent iron as a platinum alloy composition. While continuing to stir, 0.1% N840B aqueous solution 2401 was added dropwise over 20 hours. At this time, iron hydroxide Fe (OH) s is deposited on the catalyst carrier. The solid matter is suction filtered, washed with water and vacuum dried at 50°C. The powder is crushed and placed in an electric furnace, and heated at a temperature of 200 to 350° C. for 1 hour while flowing a mixed gas containing nitrogen gas and 7% hydrogen gas. At this time, the catalyst carrier supporting platinum and iron obtained in the step 0 or more in which iron is completely reduced was loaded into an infrared instantaneous heating device, and heated to 15 ml to remove oxygen in the furnace.
間窒素ガスを流す０次に窒素ガスを微量流し、窒素ふん
囲気を維持しながら、６００℃／ｓｉｎ、の速度で昇温
し９５０℃の温度で３０３間保持する。降温は６００℃
／■ｉｎ、の速度で行う、室温まで冷却して白金合金触
媒が得られる （担持量約２４％）。白金合金触媒をｘ
１回折法で測定すると、平均結晶粒径として４０人が得
られる０回折角２θとして４１．１″″３３°、 ４７
．４°の超格子線が観測される。これらはそれぞれ（１
１１）面、 （１１０）面、 （０２０）面の回折線で
ある。しかしながらＸ線回折線には鉄の回折線も観測さ
れる。これは、未反応の鉄である。電気炉温度、還元反
応時の濃度分布等の反応条件のばらつきによって生成し
たものと考えられる。熱処理により得られた白金合金触
媒をｌ ＮＬＳＯａ 溶液５００１に加え、５０℃で５
ｈ攪拌する。ろ過したあと硫酸イオンが検知されなくな
るまで純水を用いてよく洗浄する。Next, a small amount of nitrogen gas was flowed, and while maintaining a nitrogen atmosphere, the temperature was raised at a rate of 600° C./sin, and the temperature was maintained at 950° C. for 303 hours. Temperature drop is 600℃
A platinum alloy catalyst is obtained by cooling to room temperature at a rate of /■in (supported amount: about 24%). x platinum alloy catalyst
When measured by 1 diffraction method, the average crystal grain size is 40, and the zero diffraction angle 2θ is 41.1″″33°, 47
．． 4° superlattice lines are observed. These are each (1
These are the diffraction lines of the (11) plane, (110) plane, and (020) plane. However, iron diffraction lines are also observed in the X-ray diffraction lines. This is unreacted iron. It is thought that this was generated due to variations in reaction conditions such as electric furnace temperature and concentration distribution during reduction reaction. The platinum alloy catalyst obtained by heat treatment was added to lNLSOa solution 5001 and heated at 50°C for 50 minutes.
h Stir. After filtering, thoroughly wash with pure water until sulfate ions are no longer detected.
第１図は本発明の実施例に係る白金合金触媒を用いる電
極の特性（特性線１１）を従来の白金合金触媒を用いる
電極の特性（特性線１２）と対比して示す線図である。FIG. 1 is a diagram showing the characteristics of an electrode using a platinum alloy catalyst according to an example of the present invention (characteristic line 11) in comparison with the characteristics of an electrode using a conventional platinum alloy catalyst (characteristic line 12).
特性線１１は遊離した鉄を含まないため、初期特性も良
好であり、かつ安定に維持される。従来の合金触媒は鉄
を遊離しているため、特性が大きく低下する。Since the characteristic line 11 does not include free iron, the initial characteristics are also good and maintained stably. Conventional alloy catalysts liberate iron, resulting in significantly reduced properties.
上述の例では遊離した副成分である鉄を除去する工程は
、触媒製造の段階で行っているが、白金合金触媒を組込
んで電極を成型したあとあるいは成型して焼成した後に
行うこともできる。In the above example, the step of removing iron, which is a free subcomponent, is carried out at the catalyst manufacturing stage, but it can also be carried out after incorporating the platinum alloy catalyst and molding the electrode, or after molding and firing. .
この発明によれば第−工程と、第二工程と、第三工程と
、第四工程とを有し、
第一工程は、カーボン触媒担体の上に主成分である白金
を担持する工程であり、
第三工程はカーボン触媒担体の上に副成分を担持する工
程であり、
第三工程は熱処理によって前記担持された白金と副成分
とを合金化し、
第四工程は未反応副成分を除去する工程であるので、第
三工程後に残った未反応の副成分は、第四工程により除
去され、電極触媒層において反応ガス拡散を阻害したり
、撥水性を低下させるリン化物の発生がなくなり、特性
と信頼性に優れるリン酸型燃料電池が得られる。According to this invention, there are a first step, a second step, a third step, and a fourth step, and the first step is a step of supporting platinum, which is a main component, on a carbon catalyst carrier. , the third step is a step of supporting subcomponents on a carbon catalyst carrier, the third step is to alloy the supported platinum and subcomponents by heat treatment, and the fourth step is to remove unreacted subcomponents. Since it is a process, unreacted subcomponents remaining after the third process are removed in the fourth process, eliminating the generation of phosphides that inhibit reaction gas diffusion and reducing water repellency in the electrode catalyst layer, improving the characteristics. A phosphoric acid fuel cell with excellent reliability can be obtained.
第１図は本発明の実施例に係る白金合金触媒を用いる電
極の特性（特性線１１）を従来の白金合金触媒を用いる
電極の特性（特性線１２）と対比して示す線図、第２図
はリン酸型燃料電池を示す模式断面図である。
１：触媒、２：触媒担体、５：電極触媒層。
第１図
第２図FIG. 1 is a diagram showing the characteristics of an electrode using a platinum alloy catalyst according to an example of the present invention (characteristic line 11) in comparison with the characteristics of an electrode using a conventional platinum alloy catalyst (characteristic line 12); The figure is a schematic cross-sectional view showing a phosphoric acid fuel cell. 1: catalyst, 2: catalyst carrier, 5: electrode catalyst layer. Figure 1 Figure 2
Claims (1)
を有し、 第一工程は、カーボン触媒担体の上に主成分である白金
を担持する工程であり、 第二工程はカーボン触媒担体の上に副成分を担持する工
程であり、 第三工程は熱処理によって前記担持された白金と副成分
とを合金化し、 第四工程は未反応副成分を除去する工程であることを特
徴とする白金合金触媒の製造方法。[Claims] 1) It has a first step, a second step, a third step, and a fourth step, and the first step is to support platinum, which is the main component, on a carbon catalyst carrier. The second step is a step of supporting subcomponents on a carbon catalyst carrier, the third step is a heat treatment to alloy the supported platinum and the subcomponents, and the fourth step is a step of supporting unreacted subcomponents. 1. A method for producing a platinum alloy catalyst, comprising a step of removing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194351A JPH0479161A (en) | 1990-07-23 | 1990-07-23 | Manufacture of platinum alloy catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194351A JPH0479161A (en) | 1990-07-23 | 1990-07-23 | Manufacture of platinum alloy catalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0479161A true JPH0479161A (en) | 1992-03-12 |
Family
ID=16323141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2194351A Pending JPH0479161A (en) | 1990-07-23 | 1990-07-23 | Manufacture of platinum alloy catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0479161A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005317546A (en) * | 2004-04-27 | 2005-11-10 | Samsung Sdi Co Ltd | Membrane-electrode assembly for fuel cell and fuel cell system including the same |
| JP2009117381A (en) * | 2004-04-22 | 2009-05-28 | Samsung Sdi Co Ltd | Manufacturing method of membrane electrode assembly for fuel cell, and manufacturing method of fuel cell system including the same |
-
1990
- 1990-07-23 JP JP2194351A patent/JPH0479161A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009117381A (en) * | 2004-04-22 | 2009-05-28 | Samsung Sdi Co Ltd | Manufacturing method of membrane electrode assembly for fuel cell, and manufacturing method of fuel cell system including the same |
| JP2005317546A (en) * | 2004-04-27 | 2005-11-10 | Samsung Sdi Co Ltd | Membrane-electrode assembly for fuel cell and fuel cell system including the same |
| US7629072B2 (en) | 2004-04-27 | 2009-12-08 | Samsung Sdi Co., Ltd. | Membrane-electrode assembly for fuel cell and fuel cell system comprising the same |
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