JPS63190253A - Catalyst for electrode of fuel cell - Google Patents
Catalyst for electrode of fuel cellInfo
- Publication number
- JPS63190253A JPS63190253A JP62020091A JP2009187A JPS63190253A JP S63190253 A JPS63190253 A JP S63190253A JP 62020091 A JP62020091 A JP 62020091A JP 2009187 A JP2009187 A JP 2009187A JP S63190253 A JPS63190253 A JP S63190253A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- platinum
- electrode
- fuel cell
- 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 34
- 239000000446 fuel Substances 0.000 title claims description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000599 Cr alloy Inorganic materials 0.000 claims abstract description 9
- 239000011651 chromium Substances 0.000 claims abstract description 9
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 5
- 229910001260 Pt alloy Inorganic materials 0.000 claims abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 44
- 229910052697 platinum Inorganic materials 0.000 abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 230000000977 initiatory effect Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 14
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 8
- 239000003792 electrolyte Substances 0.000 description 7
- 238000006722 reduction reaction Methods 0.000 description 7
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 239000000788 chromium alloy Substances 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 4
- DSVGQVZAZSZEEX-UHFFFAOYSA-N [C].[Pt] Chemical compound [C].[Pt] DSVGQVZAZSZEEX-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- DEJLIHRUIUTRQI-UHFFFAOYSA-N chromium nickel platinum Chemical compound [Cr][Pt][Ni] DEJLIHRUIUTRQI-UHFFFAOYSA-N 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004280 Sodium formate Substances 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- MMAADVOQRITKKL-UHFFFAOYSA-N chromium platinum Chemical compound [Cr].[Pt] MMAADVOQRITKKL-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
- 229910000623 nickel–chromium alloy Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910002058 ternary alloy Inorganic materials 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
- H01M4/90—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
-
- 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
-
- 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
- H01M2004/8678—Inert electrodes with catalytic activity, e.g. for fuel cells characterised by the polarity
- H01M2004/8689—Positive electrodes
-
- 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）
本発明は燃料電池の電極に用いられる触媒に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a catalyst used in an electrode of a fuel cell.
（従来の技術）
従来、炭素粉末担体に白金を微粒子状で担持した触媒が
テトラフロロエチレン微粒子などの結着剤と共に混練さ
れて燃料電池用電極の電気化学的反応層として用いられ
ているが、特にりん酸を電解質とする燃料電池のカソー
ド（空気極）に於いては、微粒状の白金が長時間の運転
中に次第に凝集し、粒子成長を起こして、白金の表面積
が減少し、燃料電池の起電力が低下するという問題があ
った。(Prior Art) Conventionally, a catalyst in which platinum is supported in the form of fine particles on a carbon powder carrier is kneaded with a binder such as fine particles of tetrafluoroethylene and used as an electrochemical reaction layer of an electrode for a fuel cell. Particularly in the cathode (air electrode) of a fuel cell that uses phosphoric acid as an electrolyte, fine particulate platinum gradually aggregates during long-term operation, causing particle growth and reducing the surface area of the platinum. There was a problem that the electromotive force decreased.
燃料電池の空気極に於いては酸電解質型燃料電池を例に
とれば、電池外部から供給される空気中の酸素が白金な
どの触媒活性金属表面で外部回路を経由して燃料極より
流入する電子と電池内部の電解質を経由して燃料極側よ
り供給されるプロトンと化合し水を生成する反応が起こ
っている。即ち燃料電池の空気極に於いては酸素の還元
反応を迅速に行わせる為に白金などの触媒活性物質を存
在させてその目的を達成せしめんとするもであるが、こ
の反応速度は反応物質の供給速度が充分であれば触媒物
質表面の活性サイト数に依存する。At the air electrode of a fuel cell, taking an acid electrolyte fuel cell as an example, oxygen in the air supplied from outside the cell flows from the fuel electrode via an external circuit on the surface of a catalytically active metal such as platinum. A reaction occurs in which electrons combine with protons supplied from the fuel electrode via the electrolyte inside the battery to produce water. In other words, in the air electrode of a fuel cell, a catalytically active substance such as platinum is present in order to quickly carry out the oxygen reduction reaction, but this reaction rate is limited by the amount of reactants. The sufficient supply rate depends on the number of active sites on the surface of the catalyst material.
かくして、使用中の触媒活性金属表面積の減少防止とい
うことは燃料電池の性能の長寿命化に重、大な効果をも
たらすものであり、従来の白金だけを導電性炭素粉末上
に担持した触媒では必ずしも満足したものではなかった
。Thus, preventing the reduction of the catalytic active metal surface area during use has a significant effect on extending the performance life of fuel cells. It wasn't always satisfying.
（発明の目的）
本発明は、この欠点を除去するため炭素粉末上に担持さ
れた活性金属の表面積の減少を抑制し、もって燃料電池
用電極の触媒活性寿命の長期化を計らんとするものであ
る。(Object of the invention) In order to eliminate this drawback, the present invention aims to suppress the decrease in the surface area of the active metal supported on the carbon powder, thereby extending the catalytic activity life of the fuel cell electrode. It is.
（問題点を解決するための手段）
本発明の燃料電池電極用触媒は、白金とニッケルとクロ
ムとの合金を含有して成ることを特徴とするものである
。(Means for Solving the Problems) The fuel cell electrode catalyst of the present invention is characterized by containing an alloy of platinum, nickel, and chromium.
本発明において触媒中に白金とニッケルとクロムの合金
を含ませる理由は、使用中に微粒状の白金が次第に凝集
し、粒子成長を起こして白金の表面積が減少するのを抑
制するためである。The reason why an alloy of platinum, nickel, and chromium is included in the catalyst in the present invention is to suppress the gradual agglomeration of fine platinum particles during use, causing particle growth, and reducing the surface area of platinum.
（実施例）
２．７００℃で熱処理をしてＢ、Ｅ、Ｔ法による比表面
積が１６６ｒｒｆ／ｇをＸ線回折による面間隔ｄ （０
０２）が６，７４８人、結晶子サイズＬ ｃ（００２）
が２２１人になった導電性カーボンブラック９０ｇを白
金１０ｇを含む４１のへキサクロロ白金酸（ＨｚＰ ｔ
Ｃ１ｋ＞溶液に加え充分に攪拌した。次に１．２５モ
ル濃度のギ酸ナトリウム（ＩＩＣＯＯＮａ）水溶液４１
をこれに加えて３時間激しく攪拌しながら白金を還元し
た後、濾過、洗浄をした。このものを６０℃に制御され
ている温風乾燥機にて乾燥しさらにＮ２気流中１２０℃
で乾燥処理し、粉砕して白金カーボン９７ｇを得た。(Example) 2. After heat treatment at 700°C, the specific surface area by B, E, T method was 166rrf/g, and the lattice spacing d (0
02), 6,748 people, crystallite size L c (002)
90 g of conductive carbon black, which had become 221 people, was mixed with 41 hexachloroplatinic acid (HzP t) containing 10 g of platinum.
C1k> solution and stirred thoroughly. Next, a 1.25 molar sodium formate (IICOONa) aqueous solution 41
was added to this and the platinum was reduced while vigorously stirring for 3 hours, followed by filtration and washing. This material was dried in a hot air dryer controlled at 60°C, and further dried at 120°C in a N2 stream.
The mixture was dried and pulverized to obtain 97 g of platinum carbon.
これの白金含有率を化学分、析した処９．９ｗｔ％であ
った。またＸ線回折の測定によると白金粒径は３８人で
あり、電子顕微鏡による観察では白金粒子は炭素担体上
に均一に分散していた。The platinum content of this was chemically analyzed and found to be 9.9 wt%. Further, the platinum particle size was determined to be 38 by X-ray diffraction measurement, and the platinum particles were uniformly dispersed on the carbon carrier by observation using an electron microscope.
この白金カーボン１０ｇを４００＋＋＋ｊ’の水に分散
し、水酸化アンモニウム水溶液を滴下して’Ｐ ＩＩを
８となし充分に攪拌し分散させた後、ニッケル３ｇを硝
酸ニッケルとしてまた、クロムＩｇを硝酸クロムとして
共に含有する水溶液Ｌｏｏｍ １を攪拌しながら添加し
、さらに希硝酸を滴下してＰ Ｈを５となした。連続し
て２０分間激しく攪拌を行った後、スラリーを濾過し、
６０°Ｃで乾燥した。次いでこのケーキ状触媒を粉砕し
、水素５容量％を含む窒素気流中で９２０℃、３時間熱
処理して白金−ニノケルークロム合金を導電性炭素粉末
上に担持させた触媒を９．４ｇ得た。Ｘ線回折によって
、白金は、白金−ニソケル合金又は白金−クロム合金と
は異なった合金になっていることが１ｉＩ認でき、白金
−ニッケルークロムの三元合金が生成されているものと
思われるが合金粒子が小さいため、合金中の二・ノケル
、クロムの正確な割合を決定するのは困難であった。化
学分析の結果ではこの触媒中の各金属元素の比率は重量
比で白金７９％、ニッケル１５．７％、クロム５．３％
であった。この白金−ニッケルークロム合金を担持した
触媒とテトラフロロエチレンの重量比が６：４になる様
に混練し、撥水処理をしたカーボンシート上にこれを塗
布、焼成して電極を製造し、合金粒径をＸ線回折で測定
したところ４７人であった。この電極を使用して大量の
りん酸を電解質とする半電池を組立て１９０’Ｃ１０，
８Ｖ （Ｖ、Ｓ、ＮＨＥ）の空気極として１００時間作
用させた後、合金粒径をＸ線回折で測定したところ５８
人であった。Disperse 10 g of this platinum carbon in 400+++j' water, drop an ammonium hydroxide aqueous solution to make P II 8, stir thoroughly and disperse, then 3 g of nickel as nickel nitrate and chromium Ig as chromium nitrate. The aqueous solution Loom 1 contained in the solution was added with stirring, and diluted nitric acid was further added dropwise to adjust the pH to 5. After continuous vigorous stirring for 20 minutes, the slurry was filtered;
Dry at 60°C. Next, this cake-like catalyst was crushed and heat treated at 920° C. for 3 hours in a nitrogen stream containing 5% by volume of hydrogen to obtain 9.4 g of a catalyst in which a platinum-Ninoker-chromium alloy was supported on conductive carbon powder. . X-ray diffraction has confirmed that platinum is in an alloy different from platinum-nickel alloy or platinum-chromium alloy, and it is thought that a ternary alloy of platinum-nickel-chromium is produced. However, because the alloy particles were small, it was difficult to determine the exact proportion of chromium in the alloy. As a result of chemical analysis, the weight ratio of each metal element in this catalyst is 79% platinum, 15.7% nickel, and 5.3% chromium.
Met. The catalyst carrying this platinum-nickel-chromium alloy and tetrafluoroethylene are kneaded at a weight ratio of 6:4, coated on a water-repellent carbon sheet, and fired to produce an electrode. When the alloy particle size was measured by X-ray diffraction, it was found to be 47 people. Using this electrode, a half cell with a large amount of phosphoric acid as an electrolyte was assembled, 190'C10,
After acting as a 8V (V, S, NHE) air electrode for 100 hours, the alloy particle size was measured by X-ray diffraction and found to be 58
It was a person.
（従来例）
実施例で作製した白金カーボンを触媒とし、これとテト
ラフロロエチレンの重量比が６：４になる様にこの触媒
とテトラフロロエチレンディスパージョン液を混練し、
１Ω水化処理をしたカーボンシート上にこれを塗布、焼
成して電極を製造した。(Conventional example) Using the platinum carbon produced in the example as a catalyst, this catalyst and a tetrafluoroethylene dispersion liquid were kneaded so that the weight ratio of this catalyst and tetrafluoroethylene was 6:4,
This was coated on a carbon sheet that had been subjected to 1Ω hydration treatment and fired to produce an electrode.
電極に成形したものの白金粒径をＸ線回折で測定したと
ころ４０人であった。この電極を使用して大量のりん酸
を電解質とする半電池を組立て１９０℃、０．８Ｖ、（
Ｖ、Ｓ、ＮＨＥ）の空気極として１００時間作用させた
後、電極を取り出し白金粒径をＸ線回折で測定したとこ
ろ８０人に増大していた。When the platinum particle size of the electrodes was measured by X-ray diffraction, it was found to be 40 people. Using this electrode, we assembled a half-cell with a large amount of phosphoric acid as the electrolyte at 190°C, 0.8V, (
After acting as an air electrode for 100 hours (V, S, NHE), the electrode was taken out and the platinum particle size was measured by X-ray diffraction, and it was found to have increased to 80 particles.
また実施例及び従来例で成形したと同じ内容の各々の電
極について電解質を１００％りん酸とする半電池を組み
、触媒電極の背面から酸素を供給し、該触媒電極と対極
との間に電流を流し、同一の電解質内に該触媒電極の電
極電位を計測できる様に配置された水素基準電極に依っ
て１９０℃で該触媒電極が９００ｍＶの電位に保持され
る様にポテンシオスタットを用いて電位規制法による酸
素還元電流を測定した。
′燃料電池の酸素還元触媒の活性度は電極電位９００
ｍ〜′に於いて電極中の白金１■当りに得られる電流値
（ｍＡ）で比較できる。In addition, a half cell with 100% phosphoric acid as the electrolyte was assembled for each electrode having the same contents as those molded in the example and the conventional example, oxygen was supplied from the back side of the catalyst electrode, and a current was passed between the catalyst electrode and the counter electrode. using a potentiostat so that the catalyst electrode was maintained at a potential of 900 mV at 190° C. using a hydrogen reference electrode placed in the same electrolyte so that the electrode potential of the catalyst electrode could be measured. Oxygen reduction current was measured using the potential regulation method.
'The activity of the oxygen reduction catalyst in a fuel cell is at an electrode potential of 900
A comparison can be made using the current value (mA) obtained per square meter of platinum in the electrode at m~'.
従来例と同じ内容の白金を担持した触媒電極では２８ｍ
Ａ／■、実施例と同じ内容の白金−二ノケル−クロム合
金を担持した触媒電極では４５ｍＡ ／■であった。28 m for a catalyst electrode supporting platinum with the same content as the conventional example.
A/■, 45 mA/■ for a catalyst electrode supporting a platinum-dinochelium-chromium alloy having the same content as in the example.
以上のことから明らかなように実施例の導電性炭素粉末
に白金−ニノケルークロム合金を担持した触媒は、従来
例の導電性炭素粉末に白金を担持した触媒に比べて燃料
電池の起電力低下防止に大きな効果を与える触媒活性金
属粒子の粒径増大防止に有効であり、さらに酸素還元電
極用触媒としての初期活性も優れている。As is clear from the above, the catalyst in which the platinum-Ninokeru chromium alloy is supported on the conductive carbon powder of the example has a lower electromotive force in the fuel cell than the catalyst in which the platinum is supported on the conductive carbon powder of the conventional example. It is effective in preventing an increase in the particle size of catalytically active metal particles, which has a great effect on prevention, and furthermore, it has excellent initial activity as a catalyst for oxygen reduction electrodes.
（発明の効果）
以上の説明で判るように、本発明の燃料電池電極用触媒
は、触媒活性金属粒子が白金単独でなく、白金−ニソケ
ルークロム合金であるから、長時間使用しても凝集し粒
子成長を起こして粒子の表面積が減少するのを抑制でき
るので、起電力低下が殆んどなく、またニッケル及びク
ロムの助触媒的作用により酸素還元触媒としての初期活
性も高いと云う効果がある。(Effects of the Invention) As can be seen from the above explanation, in the fuel cell electrode catalyst of the present invention, since the catalytically active metal particles are not platinum alone but a platinum-nisokel-chromium alloy, the particles do not aggregate even after long-term use. Since it is possible to suppress the reduction in the surface area of particles due to growth, there is almost no drop in electromotive force, and the initial activity as an oxygen reduction catalyst is also high due to the promoter action of nickel and chromium.
Claims (2)
媒が白金とニッケルとクロムとの合金を含むことを特徴
とする燃料電池電極用触媒。(1) A fuel cell electrode catalyst used in a fuel cell, characterized in that the catalyst contains an alloy of platinum, nickel, and chromium.
成ることを特徴とする特許請求の範囲第１項記載の燃料
電池電極用触媒。(2) The catalyst for a fuel cell electrode according to claim 1, wherein the catalyst is formed by supporting the alloy on conductive carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62020091A JPS63190253A (en) | 1987-01-30 | 1987-01-30 | Catalyst for electrode of fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62020091A JPS63190253A (en) | 1987-01-30 | 1987-01-30 | Catalyst for electrode of fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63190253A true JPS63190253A (en) | 1988-08-05 |
Family
ID=12017438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62020091A Pending JPS63190253A (en) | 1987-01-30 | 1987-01-30 | Catalyst for electrode of fuel cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63190253A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7662740B2 (en) * | 2003-06-03 | 2010-02-16 | Symyx Technologies, Inc. | Platinum-chromium-copper/nickel fuel cell catalyst |
| CN106252677A (en) * | 2016-08-03 | 2016-12-21 | 陕西瑞科新材料股份有限公司 | A kind of preparation method of charcoal platinum catalyst |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618851A (en) * | 1984-06-07 | 1986-01-16 | ガイナー・インコーポレーテツド | Fuel battery and electrolyte catalyst therefor |
-
1987
- 1987-01-30 JP JP62020091A patent/JPS63190253A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS618851A (en) * | 1984-06-07 | 1986-01-16 | ガイナー・インコーポレーテツド | Fuel battery and electrolyte catalyst therefor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7662740B2 (en) * | 2003-06-03 | 2010-02-16 | Symyx Technologies, Inc. | Platinum-chromium-copper/nickel fuel cell catalyst |
| CN106252677A (en) * | 2016-08-03 | 2016-12-21 | 陕西瑞科新材料股份有限公司 | A kind of preparation method of charcoal platinum catalyst |
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