JP2006127942A - 燃料電池用触媒担持体およびその製造方法 - Google Patents
燃料電池用触媒担持体およびその製造方法 Download PDFInfo
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- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
【解決手段】電子顕微鏡により測定した算術平均粒子径dnとディスクセントリフュージ装置(DCF)により測定したストークスモード径Dstとの比、Dst/dnが2以下の粒子性状を有し、X線回折法により測定した結晶子格子面間隔(d002 )が0.350nm以下の結晶性状を備え、その結晶構造が同心多面体の入れ子構造である炭素球状体からなることを特徴とする燃料電池用触媒担持体。その製造方法は、炭化水素ガスを水素ガスとともに熱分解炉の予熱帯域に導入し、引き続く加熱帯域において炭化水素ガス濃度を0.5〜40vol%、レイノルズ数を1〜20、温度を1100〜1300℃に設定して熱分解し、得られた炭素球状体を非酸化性雰囲気中で2000℃以上の温度で熱処理することを特徴とする。
【選択図】図6
Description
カソード;1/2O2 +2H+ +2e- →H2 O
全反応 ;H2 +1/2O2 →H2 O
試料を超音波分散器により28kHzの周波数で30秒間クロロホルムに分散させたのち、分散試料をカーボン支持膜に固定する(固定法は、例えば「粉体物性図説」粉体工学研究会編、P68(C) "水面膜法" に記載されている)。これを電子顕微鏡で直接倍率10000倍、総合倍率100000倍に撮影し、得られた写真からランダムに1000個の粒子直径を計測し、14nmごとに区分して作成したヒストグラムから算術平均粒子直径を求める。
乾燥した試料を少量の界面活性剤を含む20容量%エタノール水溶液と混合して分散濃度0.1kg/m3 の分散液を作成し、これを超音波で十分に分散させて測定用試料とする。ディスク・セントリフュージ装置(DCF 英国JoyesLobel社製)を100 s-1の回転数に設定し、スピン液(2重量%グリセリン水溶液、25℃)を0.015dm3 加えた後、0.001dm3 のバッファー液(20容量%エタノール水溶液、25℃)を注入する。次いで、温度25℃の炭素分散液0.0005dm3 を注射器で加えた後、遠心沈降を開始し、同時に記録計を作動させて図2に示す分布曲線(横軸;炭素分散液を注射器で加えてからの経過時間、縦軸;炭素試料の遠心沈降に伴い変化した特定点での吸光度)を作成する。この分布曲線より各時間Tを読み取り、次式(数1)に代入して各時間に対応するストークス相当径を算出する。
図5に示した装置において、加熱炉20の内径を145mm、長さを1500mm、予熱帯域21の長さを200mm、加熱帯域23の長さを400mm、反応管24の内径を20mm、長さを450mmとし、原料炭化水素にトルエンを用いて水素ガスによりバブリングして気化し、また水素ガス供給量を変えて加熱炉20に導入した。このようにして反応管24におけるトルエンガス濃度、トルエンガスと水素ガスの混合ガスの流速、温度などを変えて2時間熱分解した。得られた炭素球状体をアルゴン雰囲気中で熱処理して黒鉛化した。
市販のアセチレンブラック(比較例3)、市販のアセチレンブラックをアルゴン雰囲気中2800℃で熱処理(比較例4)、市販の天然黒鉛粉(比較例5)、カーボンマイクロビーズ(比較例6)を試料とした。
2 アノード
3 カソード
4 アノード側触媒電極
5 カソード側触媒電極
6 アノード側ガス拡散層
7 カソード側ガス拡散層
8 セパレータ
9 反応ガス流路
10 シール材
11、12 水素ガスボンベ
13、14 流量計
15 原料タンク
16、17、18 ステンレスパイプ
19 圧力計
20 加熱炉
21 予熱帯域
22、25 ヒータ
23 加熱帯域
24 反応管
26、27 温度調節器
28 放射温度計
29 冷却管
30 捕集室
31 圧力制御バルブ
32 真空ポンプ
33 水槽
34 燃焼装置
Claims (2)
- 電子顕微鏡により測定した算術平均粒子径dnとディスクセントリフュージ装置(DCF)により測定したストークスモード径Dstとの比、Dst/dnが2以下の粒子性状を有し、X線回折法により測定した結晶子格子面間隔(d002 )が0.350nm以下の結晶性状を備え、その結晶構造が同心多面体の入れ子構造である炭素球状体からなることを特徴とする燃料電池用触媒担持体。
- 炭化水素ガスをキャリアガスとともに熱分解炉の予熱帯域に導入し、引き続く加熱帯域において炭化水素ガス濃度を0.5〜40vol%、レイノルズ数を1〜20、温度を1100〜1300℃に設定して熱分解し、得られた炭素球状体を非酸化性雰囲気中で2000℃以上の温度で熱処理することを特徴とする請求項1記載の燃料電池用触媒担持体の製造方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008189790A (ja) * | 2007-02-05 | 2008-08-21 | Tokai Carbon Co Ltd | 炭素微小球の製造方法 |
JP2009221057A (ja) * | 2008-03-17 | 2009-10-01 | Japan Energy Corp | 水素製造システム |
CN105013542A (zh) * | 2015-06-15 | 2015-11-04 | 华南理工大学 | 一种基于不锈钢纤维烧结的蜂窝载体及其制备方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001357857A (ja) * | 2000-06-12 | 2001-12-26 | Asahi Glass Co Ltd | 固体高分子型燃料電池及びその製造方法 |
JP2004211012A (ja) * | 2003-01-08 | 2004-07-29 | Tokai Carbon Co Ltd | 炭素微小球及びその製造方法 |
-
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- 2004-10-29 JP JP2004315514A patent/JP2006127942A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001357857A (ja) * | 2000-06-12 | 2001-12-26 | Asahi Glass Co Ltd | 固体高分子型燃料電池及びその製造方法 |
JP2004211012A (ja) * | 2003-01-08 | 2004-07-29 | Tokai Carbon Co Ltd | 炭素微小球及びその製造方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008189790A (ja) * | 2007-02-05 | 2008-08-21 | Tokai Carbon Co Ltd | 炭素微小球の製造方法 |
JP2009221057A (ja) * | 2008-03-17 | 2009-10-01 | Japan Energy Corp | 水素製造システム |
CN105013542A (zh) * | 2015-06-15 | 2015-11-04 | 华南理工大学 | 一种基于不锈钢纤维烧结的蜂窝载体及其制备方法 |
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