JP2000273351A - Preparation of graphitized carbon black - Google Patents
Preparation of graphitized carbon blackInfo
- Publication number
- JP2000273351A JP2000273351A JP11077775A JP7777599A JP2000273351A JP 2000273351 A JP2000273351 A JP 2000273351A JP 11077775 A JP11077775 A JP 11077775A JP 7777599 A JP7777599 A JP 7777599A JP 2000273351 A JP2000273351 A JP 2000273351A
- Authority
- JP
- Japan
- Prior art keywords
- carbon black
- graphitized carbon
- graphitization
- boron
- catalyst
- 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
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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、リン酸型燃料電池
の触媒担体等として適する黒鉛化カーボンブラックの製
造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing graphitized carbon black suitable for use as a catalyst carrier for a phosphoric acid fuel cell.
【０００２】[0002]
【従来の技術】リン酸型燃料電池は、リン酸水溶液を電
解質とする電池であり、基本的には、電解質の両側に多
孔質のガス拡散電極からなる正極及び負極を接触させた
構造である。このガス拡散電極は、通常、カーボンブラ
ック等の担体に貴金属を担持させた触媒粉末とポリテト
ラフルオロエチレン（ＰＴＦＥ）等のバインダー成分か
らなる触媒層を、電気伝導性に優れた多孔質カーボン基
材上に形成したものである。2. Description of the Related Art A phosphoric acid type fuel cell is a battery using an aqueous solution of phosphoric acid as an electrolyte, and has basically a structure in which a positive electrode and a negative electrode comprising a porous gas diffusion electrode are brought into contact with both sides of the electrolyte. . This gas diffusion electrode is usually formed by bonding a catalyst layer comprising a catalyst powder in which a noble metal is supported on a carrier such as carbon black and a binder component such as polytetrafluoroethylene (PTFE) to a porous carbon substrate having excellent electrical conductivity. It is formed above.
【０００３】リン酸型燃料電池では、この触媒層におい
て、気体である酸素又は酸素と、液体であるリン酸電解
質と、固体である触媒の三相が共存する界面部分が形成
され、電気化学的反応を直接エネルギーとして取り出す
ことが可能となる。In a phosphoric acid type fuel cell, an interface portion in which three phases of gaseous oxygen or oxygen, a liquid phosphoric acid electrolyte, and a solid catalyst coexist is formed in this catalyst layer, and the electrochemical layer is formed. The reaction can be directly extracted as energy.
【０００４】該触媒層を構成する触媒成分において、貴
金属触媒の担体は、良好な電気伝導性とリン酸水溶液に
対する優れた耐食性を有することが必要であり、従来、
オイルファーネスブラック、アセチレンブラック等のカ
ーボンブラックを用いることが多い。In the catalyst component constituting the catalyst layer, the carrier of the noble metal catalyst needs to have good electric conductivity and excellent corrosion resistance to a phosphoric acid aqueous solution.
Carbon black such as oil furnace black and acetylene black is often used.
【０００５】しかしながら、カーボンブラックは、電位
が０．８Ｖ（ｖｓ．ＲＨＥ）以上になると、急激に腐食
を起こすことが知られており、触媒用担体に腐食が生じ
ると、貴金属触媒が担体から遊離して触媒としての機能
を失うという問題点がある。However, it is known that carbon black rapidly corrodes when the potential becomes 0.8 V (vs. RHE) or higher. When corrosion occurs on the catalyst carrier, the noble metal catalyst is released from the carrier. And loses its function as a catalyst.
【０００６】触媒用担持体の腐食を抑制する試みとして
は、例えば、オイルファーネスブラックを原料として用
い、これを水蒸気賦活処理した後、２７００℃以上の温
度に加熱して黒鉛化する方法（特開平６−１４００４７
号公報）、オイルファーネスブラックを２７００℃以上
の温度に加熱して黒鉛化し、その後、水蒸気賦活処理を
行なう方法等によって、寿命が長く、しかも触媒金属を
高分散状態に担持できる触媒用カーボン担体を製造する
方法が提案されている。As an attempt to suppress the corrosion of the catalyst carrier, for example, oil furnace black is used as a raw material, which is activated by steam, and then heated to a temperature of 2700.degree. 6-140047
Publication), by heating oil furnace black to a temperature of 2700 ° C. or more to be graphitized and then performing a steam activation treatment, a catalyst carbon support having a long life and capable of supporting a catalyst metal in a highly dispersed state. Manufacturing methods have been proposed.
【０００７】しかしながら、これらの方法では、黒鉛化
処理を行うために２７００℃以上という高温度で熱処理
することが必要であり、製造コストが非常に高くなると
いう問題点がある。However, these methods require a heat treatment at a high temperature of 2700 ° C. or more in order to perform the graphitization treatment, and there is a problem that the production cost becomes extremely high.
【０００８】[0008]
【発明が解決しようとする課題】本発明の主な目的は、
耐食性に優れ、しかも優れた電池特性を発揮できるリン
酸型燃料電池の触媒用担体として適する黒鉛化カーボン
ブラックを、低コストで製造できる方法を提供すること
である。SUMMARY OF THE INVENTION The main object of the present invention is to:
An object of the present invention is to provide a method for producing graphitized carbon black suitable as a catalyst carrier of a phosphoric acid type fuel cell having excellent corrosion resistance and excellent cell characteristics at low cost.
【０００９】[0009]
【課題を解決するための手段】本発明者は、上記した課
題を解決すべく鋭意研究を重ねた結果、カーボンブラッ
クを原料として用い、これを黒鉛化を促進する機能を有
する物質と混合して、加熱処理する方法によれば、従来
の処理方法と比べて非常に低い加熱温度で、カーボンブ
ラックを十分に黒鉛化することが可能となることを見出
した。そして、この様な方法で黒鉛化されたカーボンブ
ラックは、黒鉛化処理の前又は後に賦活処理することに
よって、耐食性が良好で、しかも触媒金属を高分散状態
で担持し得る触媒用担体となることを見出し、ここに本
発明を完成するに至った。The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have used carbon black as a raw material and mixed it with a substance having a function of promoting graphitization. According to the heat treatment method, it has been found that carbon black can be sufficiently graphitized at a very low heating temperature as compared with the conventional treatment method. Then, the carbon black graphitized by such a method becomes a catalyst carrier that has good corrosion resistance and can support a catalyst metal in a highly dispersed state by performing an activation treatment before or after the graphitization treatment. And completed the present invention.
【００１０】即ち、本発明は、下記の黒鉛化カーボンブ
ラックの製造方法、及びリン酸型燃料電池用触媒を提供
するものである。 １．カーボンブラック及び黒鉛化促進物質を含む混合物
を加熱処理することを特徴とする黒鉛化カーボンブラッ
クの製造方法。 ２．黒鉛化促進物質が、ホウ素元素、ホウ酸、酸化ホウ
素、炭化ホウ素、窒化ホウ素及びホウ酸塩から選ばれた
少なくとも一種である上記項１に記載の黒鉛化カーボン
ブラックの製造方法。 ３．加熱温度が２０００〜２５００℃である上記項１又
は２に記載の黒鉛化カーボンブラックの製造方法。 ４．上記項１〜３のいずれかに記載の方法において、加
熱処理の前又は後に賦活処理を行うことを特徴とするリ
ン酸型燃料電池の触媒担体用黒鉛化カーボンブラックの
製造方法。 ５．上記項１〜４のいずれかに記載の方法で得られた黒
鉛化カーボンブラックに白金を担持してなるリン酸型燃
料電池用触媒。That is, the present invention provides the following method for producing graphitized carbon black, and a catalyst for a phosphoric acid type fuel cell. 1. A method for producing graphitized carbon black, comprising heating a mixture containing carbon black and a graphitization promoting substance. 2. Item 2. The method for producing graphitized carbon black according to Item 1, wherein the graphitization promoting substance is at least one selected from the group consisting of elemental boron, boric acid, boron oxide, boron carbide, boron nitride and borate. 3. Item 3. The method for producing graphitized carbon black according to item 1 or 2, wherein the heating temperature is 2000 to 2500 ° C. 4. Item 4. The method for producing graphitized carbon black for a catalyst carrier of a phosphoric acid fuel cell according to any one of Items 1 to 3, wherein the activation treatment is performed before or after the heat treatment. 5. Item 5. A phosphoric acid type fuel cell catalyst comprising platinum supported on the graphitized carbon black obtained by the method according to any one of Items 1 to 4.
【００１１】[0011]
【発明の実施の形態】本発明方法では、原料として用い
るカーボンブラックは、いかなる方法で製造されたもの
でも良いが、本発明による黒鉛化の効果を十分に発現さ
せるためには、層状構造の発達する前の低温で処理され
たカーボンブラックが好ましい。この様なカーボンブラ
ックとしては、例えば、オイルファーネスブラック、ア
セチレンブラック等を例示できる。DETAILED DESCRIPTION OF THE INVENTION In the method of the present invention, carbon black used as a raw material may be produced by any method. However, in order to sufficiently exhibit the graphitizing effect according to the present invention, it is necessary to develop a layered structure. Carbon black that has been treated at a low temperature prior to heat treatment is preferred. Examples of such carbon black include oil furnace black and acetylene black.
【００１２】本発明で用いる黒鉛化促進物質とは、カー
ボンブラックと混合して加熱した際に、カーボンブラッ
クの黒鉛化を促進する効果を有する物質であり、具体例
として、Ｂ、Ｓｉ、Ａｌ、Ｆｅ等の各元素自体、これら
の元素を含む化合物等を挙げることができる。特に、ホ
ウ素元素自体やホウ酸、酸化ホウ素、炭化ホウ素、窒化
ホウ素、ホウ酸塩（ナトリウム塩、カリウム塩等）等の
ホウ素原子を含有する化合物が好ましい。The graphitization promoting substance used in the present invention is a substance having an effect of promoting the graphitization of carbon black when mixed with carbon black and heated, and specific examples thereof include B, Si, Al, Examples of each element such as Fe, a compound containing these elements, and the like can be given. In particular, compounds containing a boron atom such as boron element itself, boric acid, boron oxide, boron carbide, boron nitride, and borate (sodium salt, potassium salt, etc.) are preferable.
【００１３】黒鉛化促進物質は、一種単独又は二種以上
混合して用いることができる。The graphitization promoting substances can be used singly or in combination of two or more.
【００１４】本発明方法では、カーボンブラック及び黒
鉛化促進物質を含む混合物を加熱して、カーボンブラッ
クを黒鉛化することが必要である。この様な方法によれ
ば、従来の黒鉛化方法と比べて低い温度で加熱するだけ
で、カーボンブラックを黒鉛化して、結晶性に優れた黒
鉛化カーボンブラックとすることができ、低コストで黒
鉛化カーボンブラックを得ることができる。In the method of the present invention, it is necessary to heat the mixture containing the carbon black and the graphitization promoting substance to graphitize the carbon black. According to such a method, the carbon black can be graphitized by simply heating at a lower temperature than the conventional graphitization method, and a graphitized carbon black having excellent crystallinity can be obtained. Carbon black can be obtained.
【００１５】カーボンブラックと黒鉛化促進物質の混合
割合は、カーボンブラック１００重量部に対して、黒鉛
化促進物質に含まれる黒鉛化を促進する効果を有する元
素の量、即ち、Ｂ、Ｓｉ、Ａｌ、Ｆｅ等の元素量とし
て、０．１〜１０重量部程度、好ましくは、１〜５重量
部程度とすればよい。The mixing ratio of carbon black and the graphitization promoting substance is based on the amount of the element having the effect of promoting graphitization contained in the graphitization promoting substance, ie, B, Si, Al, per 100 parts by weight of the carbon black. , Fe, etc., may be about 0.1 to 10 parts by weight, preferably about 1 to 5 parts by weight.
【００１６】加熱温度は、２０００℃程度以上、好まし
くは、２０００〜２５００℃程度とすればよい。加熱雰
囲気は、窒素、アルゴン等の不活性雰囲気とすればよ
い。The heating temperature may be about 2000 ° C. or higher, preferably about 2000 to 2500 ° C. The heating atmosphere may be an inert atmosphere such as nitrogen or argon.
【００１７】この様にして得られる黒鉛化カーボンブラ
ックは、リン酸電解質に対して濡れ難く、耐食性に優れ
たものとなる。The graphitized carbon black obtained in this manner is hardly wetted by the phosphoric acid electrolyte and has excellent corrosion resistance.
【００１８】上記黒鉛化カーボンブラックをリン酸型燃
料電池の触媒用担体として用いるためには、上記黒鉛化
処理の前又は後に、賦活処理を行うことが好ましい。賦
活処理を行うことによって、比表面積が増加し、カーボ
ン担体に触媒金属を微細に分散させることが可能とな
り、初期特性等の電池特性を向上させることができる。In order to use the graphitized carbon black as a catalyst carrier for a phosphoric acid type fuel cell, it is preferable to perform an activation treatment before or after the graphitization treatment. By performing the activation treatment, the specific surface area increases, the catalyst metal can be finely dispersed in the carbon support, and the battery characteristics such as initial characteristics can be improved.
【００１９】賦活処理は、公知の方法に従って行うこと
ができる。例えば、水蒸気賦活処理として、８０℃程度
以上の飽和水蒸気を含んだ窒素ガス雰囲気中で８００〜
１０００℃程度に加熱することにより賦活処理を行うこ
とができる。The activation treatment can be performed according to a known method. For example, as a water vapor activation treatment, 800 to 800 ° C. or more in a nitrogen gas atmosphere containing saturated water vapor.
The activation treatment can be performed by heating to about 1000 ° C.
【００２０】上記した方法によって賦活処理を行った黒
鉛化カーボンブラックは、比表面積が大きく、触媒金属
である白金粒子等の貴金属を高分散状態で担持すること
ができ、しかも、耐食性が良好である。The graphitized carbon black activated by the method described above has a large specific surface area, can support a noble metal such as platinum particles as a catalyst metal in a highly dispersed state, and has good corrosion resistance. .
【００２１】黒鉛化カーボンブラックに白金粒子等の貴
金属を担持させる方法については、特に限定はなく、常
法に従えばよい。白金の担持量についても特に限定はな
く、公知の触媒と同程度とすれば良く、通常、カーボン
ブラック１００重量部に対して、白金等の貴金属量とし
て、５〜２０重量部程度とすればよい。The method of supporting the noble metal such as platinum particles on the graphitized carbon black is not particularly limited, and may be in accordance with a conventional method. The amount of supported platinum is not particularly limited, and may be the same as that of a known catalyst. Usually, the amount of noble metal such as platinum may be about 5 to 20 parts by weight with respect to 100 parts by weight of carbon black. .
【００２２】白金などの触媒金属を担持させた黒鉛化カ
ーボンブラックは、ポリテトラフルオロエチレン（ＰＴ
ＦＥ）等のバインダー成分と混合して、常法に従って、
多孔質カーボンシート等の基材上に塗布して触媒層とす
ることによって、リン酸型燃料電池用のガス拡散電極と
することができる。Graphitized carbon black carrying a catalytic metal such as platinum is polytetrafluoroethylene (PT).
FE) and the like, and mixed with a binder component according to a conventional method.
A gas diffusion electrode for a phosphoric acid-type fuel cell can be obtained by coating a base material such as a porous carbon sheet to form a catalyst layer.
【００２３】この様な電極を用いたリン酸型燃料電池
は、長寿命であり、しかも初期特性等の電池特性が良好
である。A phosphoric acid type fuel cell using such an electrode has a long life and good cell characteristics such as initial characteristics.
【００２４】[0024]
【発明の効果】本発明方法によれば、耐食性に優れた黒
鉛化カーボンブラックを低コストで製造できる。例え
ば、製造コストを約１００ｋｇ／バッチに換算して計算
すると、従来の２８００℃程度で黒鉛化する方法では、
約２０００円／ｋｇ程度の製造コストであったものが、
２０００℃程度で黒鉛化する場合には、約１２００円／
ｋｇ程度の製造コストとなり、黒鉛化費用は、３０〜４
０％程度削減される。According to the present invention, graphitized carbon black having excellent corrosion resistance can be produced at low cost. For example, when the production cost is calculated by converting it to about 100 kg / batch, the conventional method of graphitizing at about 2800 ° C.
Although the production cost was about 2000 yen / kg,
For graphitization at around 2000 ° C, about 1200 yen /
kg of manufacturing cost, and the cost of graphitization is 30 to 4
It is reduced by about 0%.
【００２５】また、この黒鉛化カーボンブラックを賦活
処理することによって、白金粒子等の貴金属触媒を高分
散状態で担持することが可能となり、リン酸型燃料電池
の触媒用担体として特に適する黒鉛化カーボンブラック
とすることができる。By activating this graphitized carbon black, a noble metal catalyst such as platinum particles can be supported in a highly dispersed state, and the graphitized carbon black is particularly suitable as a catalyst carrier for a phosphoric acid type fuel cell. Can be black.
【００２６】[0026]
【実施例】以下、実施例を示して本発明を更に詳細に説
明する。 実施例１ カーボンブラック（ＶＵＬＣＡＮ社製、ＸＣ−７２Ｒ）
１００重量部に対して、黒鉛化促進物質である炭化ホウ
素を４重量部（ホウ素原子として、約３重量部）加えて
混合し、Ａｒ雰囲気下で２４００℃で熱処理を行った。The present invention will be described below in further detail with reference to examples. Example 1 Carbon black (XC-72R, manufactured by VULCAN)
4 parts by weight (about 3 parts by weight as a boron atom) of boron carbide as a graphitization promoting substance was added to and mixed with 100 parts by weight, and heat treatment was performed at 2400 ° C. in an Ar atmosphere.
【００２７】得られた黒鉛化カーボンブラックについ
て、理学電機（株）製のＸ線広角回折装置（ＲＩＮＴ２
５００）を用いて、面間隔（ｄ002）を測定した。The obtained graphitized carbon black was subjected to an X-ray wide angle diffractometer (RINT2, manufactured by Rigaku Corporation).
500) was used to measure the plane distance (d 002 ).
【００２８】また、次の方法で、該黒鉛化カーボンブラ
ックの腐食試験を行った。Further, a corrosion test of the graphitized carbon black was performed by the following method.
【００２９】まず、黒鉛化カーボンブラック０．５５ｇ
に９０℃の純水１００ｍｌを加えて分散液とし、これに
ＰＴＦＥエマルジョン１０ｍｌと脱イオン水１０ｍｌを
加えて攪拌した後、ろ過することにより、マット状の薄
いろ過物を得た。これをペーパータオルに挟んでプレス
する工程を３回繰り返した後、１００℃で３分、３００
℃で１５分乾燥させ、カーボン重量を秤量した。First, 0.55 g of graphitized carbon black
Then, 100 ml of pure water at 90 ° C. was added to obtain a dispersion, 10 ml of PTFE emulsion and 10 ml of deionized water were added thereto, followed by stirring, followed by filtration to obtain a mat-like thin filtrate. After repeating the process of pressing this by sandwiching it between paper towels three times, 100 ° C. for 3 minutes, 300
After drying at 15 ° C. for 15 minutes, the weight of carbon was weighed.
【００３０】次いで、リン酸を入れたビーカーに、上記
工程で作製したマット状の黒鉛化カーボンブラックを入
れ、これを作用電極とし、更に、対極・参照極を組み込
んで、１９０℃で開回路電圧（ＯＣＶ）を安定させた状
態で電圧を１Ｖ印加し、約１時間腐食電流を測定した。
この腐食電流の対数値を時間の対数に対してプロット
し、１００分に外挿した。腐食速度は、１Ｖにおける１
００分後のカーボン単位重量当たりの電流値（μＡ／ｍ
ｇ）として表す。結果を下記表１に示す。 実施例２ カーボンブラック１００重量部に対して、黒鉛化促進物
質として酸化ホウ素を１０重量部（ホウ素原子として約
２．９重量部）用いたこと以外は、実施例１と同様にし
て黒鉛化カーボンブラックを作製した。Next, the matte graphitized carbon black prepared in the above process was placed in a beaker containing phosphoric acid, and this was used as a working electrode. Further, a counter electrode and a reference electrode were incorporated. A voltage of 1 V was applied while (OCV) was stabilized, and the corrosion current was measured for about 1 hour.
The log value of this corrosion current was plotted against the log of time and extrapolated to 100 minutes. The corrosion rate is 1 at 1V
Current value per unit weight of carbon after 00 minutes (μA / m
g). The results are shown in Table 1 below. Example 2 Graphitized carbon was produced in the same manner as in Example 1 except that 10 parts by weight of boron oxide (approximately 2.9 parts by weight as a boron atom) was used as a graphitizing accelerator with respect to 100 parts by weight of carbon black. Black was produced.
【００３１】得られた黒鉛化カーボンブラックの面間隔
の測定結果及び腐食試験結果を下記表１に示す。 実施例３ カーボンブラック１００重量部に対して、黒鉛化促進物
質としてホウ酸を２０重量部（ホウ素原子として約３．
３重量部）用いたこと以外は、実施例１と同様にして黒
鉛化カーボンブラックを作製した。Table 1 below shows the measurement results of the interplanar spacing and the corrosion test results of the obtained graphitized carbon black. Example 3 20 parts by weight of boric acid as a graphitization promoting substance (approximately 3.
Except for using 3 parts by weight), a graphitized carbon black was prepared in the same manner as in Example 1.
【００３２】得られた黒鉛化カーボンブラックの面間隔
の測定結果及び腐食試験結果を下記表１に示す。 比較例１ 黒鉛化促進物質を用いることなく、実施例１と同様にし
て黒鉛化カーボンブラックを作製した。Table 1 shows the measurement results of the interplanar spacing and the corrosion test results of the obtained graphitized carbon black. Comparative Example 1 Graphitized carbon black was produced in the same manner as in Example 1 without using the graphitization promoting substance.
【００３３】得られた黒鉛化カーボンブラックの面間隔
の測定結果及び腐食試験結果を下記表１に示す。 比較例２ 黒鉛化促進物質を用いることなく、熱処理温度を２８０
０℃として、実施例１と同様にして黒鉛化カーボンブラ
ックを作製した。Table 1 shows the measurement results of the interplanar spacing and the corrosion test results of the obtained graphitized carbon black. Comparative Example 2 The heat treatment temperature was set to 280 without using the graphitization promoting substance.
At 0 ° C., graphitized carbon black was produced in the same manner as in Example 1.
【００３４】得られた黒鉛化カーボンブラックの面間隔
の測定結果及び腐食試験結果を下記表１に示す。Table 1 shows the measurement results of the interplanar spacing and the results of the corrosion test of the obtained graphitized carbon black.
【００３５】 表１ 実施例１ 実施例２ 実施例３ 比較例１ 比較例２ 面間隔（ｄ002） （ｎｍ） 0.3413 0.3424 0.3426 0.3453 0.3415 腐食速度 （μＡ／ｍｇ） 0.84 0.97 0.98 1.87 0.85 Table 1 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Spacing (d 002 ) (nm) 0.3413 0.3424 0.3426 0.3453 0.3415 Corrosion rate (μA / mg) 0.84 0.97 0.98 1.87 0.85
───────────────────────────────────────────────────── フロントページの続き (72)発明者 浜岡 覚 大阪府大阪市中央区平野町四丁目１番２号 大阪瓦斯株式会社内 Ｆターム(参考） 4G069 AA01 AA03 AA08 BA08A BA08B BA08C BB04C BB11C BB15C BB18A BB18C BC75A BC75B BD03A BD03C CC32 FA01 FA02 FB29 FC04 4J037 AA02 BB21 BB28 CA26 EE11 EE26 EE31 EE47 FF30 5H018 AA04 AS01 BB01 BB08 BB12 DD08 EE01 EE02 EE03 EE08 EE11 EE19 HH08 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoru Hamaoka 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka F-term in Osaka Gas Co., Ltd. 4G069 AA01 AA03 AA08 BA08A BA08B BA08C BB04C BB11C BB15C BB18A BB18C BC75A BC75B BD03A BD03C CC32 FA01 FA02 FB29 FC04 4J037 AA02 BB21 BB28 CA26 EE11 EE26 EE31 EE47 FF30 5H018 AA04 AS01 BB01 BB08 BB12 DD08 EE01 EE02 EE03 EE08 EE11 EE19 HH08
Claims (5)
む混合物を加熱処理することを特徴とする黒鉛化カーボ
ンブラックの製造方法。1. A method for producing graphitized carbon black, comprising heating a mixture containing carbon black and a graphitization promoting substance.
酸化ホウ素、炭化ホウ素、窒化ホウ素及びホウ酸塩から
選ばれた少なくとも一種である請求項１に記載の黒鉛化
カーボンブラックの製造方法。2. The graphitization-promoting substance comprises a boron element, boric acid,
The method for producing graphitized carbon black according to claim 1, wherein the method is at least one selected from boron oxide, boron carbide, boron nitride, and borate.
求項１又は２に記載の黒鉛化カーボンブラックの製造方
法。3. The method for producing graphitized carbon black according to claim 1, wherein the heating temperature is 2000 to 2500 ° C.
いて、加熱処理の前又は後に賦活処理を行うことを特徴
とするリン酸型燃料電池の触媒担体用黒鉛化カーボンブ
ラックの製造方法。4. The method for producing graphitized carbon black for a catalyst carrier of a phosphoric acid type fuel cell according to claim 1, wherein the activation treatment is performed before or after the heat treatment. .
られた黒鉛化カーボンブラックに白金を担持してなるリ
ン酸型燃料電池用触媒。5. A phosphoric acid type fuel cell catalyst comprising the graphitized carbon black obtained by the method according to claim 1 and platinum supported thereon.
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|---|---|---|---|
| JP11077775A JP2000273351A (en) | 1999-03-23 | 1999-03-23 | Preparation of graphitized carbon black |
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