JP6198810B2 - 触媒担体用炭素材料 - Google Patents
触媒担体用炭素材料 Download PDFInfo
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- B01J35/647—2-50 nm
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/343—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of ultrasonic wave energy
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- C01B32/00—Carbon; Compounds thereof
- C01B32/20—Graphite
- C01B32/205—Preparation
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- 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
- H01M4/9075—Catalytic material supported on carriers, e.g. powder carriers
- H01M4/9083—Catalytic material supported on carriers, e.g. powder carriers on carbon or graphite
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- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/30—Scanning electron microscopy; Transmission electron microscopy
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
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- B01J35/638—Pore volume more than 1.0 ml/g
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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
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Description
しかしながら、最近の技術の進展に伴い、触媒の使用環境は更に過酷となったため、触媒担体に対しても、耐久性を含む性能の更なる改善が必要となっている。
なお、細孔径及び積算細孔容積の算出に当たっては、いくつかの解析手法があるが、吸着過程の吸着等温線をDollimore−Heal法(DH法)で解析して算出することができる。
炭素材料の構造は、日立ハイテクノロジーズ製電界放出形走査電子顕微鏡(SEM)SU−9000型を用いて形状を観察し、カーボンナノデンドライト構造の有無を確認した。
25℃における水蒸気相対圧10%における水蒸気吸着量(mL/g)(V10)を窒素吸着BET表面積(m2/g)(S)で割り、単位面積当たりの水蒸気吸着量(mL/m2)(V10/S;Q値)を算出した。
最初に、硝酸銀を1.1モル %の濃度で含むアンモニア水溶液(1.9%)150mLをフラスコに用意し、アルゴンや乾燥窒素などの不活性ガスで残留酸素を除去した。この溶液を攪拌し、超音波振動子を液体に浸して振動を与えながら、アセチレンガスをこの溶液に対し25mL/minの流速で約4分間吹き入れた。
第2熱処理の温度を1800℃とした以外は、実施例1と同様に処理して、炭素材料を得た。
第2熱処理の温度を2000℃、処理時間を0.5時間とした以外は、実施例1と同様に処理して、炭素材料を得た。
第2熱処理の加熱時間を2時間とした以外は、実施例3と同様に処理して、炭素材料を得た。
第2熱処理の加熱時間を4時間とした以外は、実施例3と同様に処理して、炭素材料を得た。実施例5で得られた炭素材料のXRD回折例を図3に示す。
第2熱処理の温度を2200℃とした以外は、実施例1と同様に処理して、炭素材料を得た。
第2熱処理の温度を200℃とした以外は、実施例1と同様に処理して、炭素材料を得た。比較例1で得られた炭素材料のXRD回折例を図4に示す。
第2熱処理の温度を800℃とした以外は、実施例1と同様に処理して、炭素材料を得た。
第2熱処理の温度を1200℃とした以外は、実施例1と同様に処理して、炭素材料を得た。
第2熱処理の温度を2600℃とした以外は、実施例1と同様に処理して、炭素材料を得た。比較例4で得られた炭素材料のSEM像を図7に示す。
水素化触媒反応の例として、実施例1〜6、および比較例1〜4の炭素材料を触媒担体として用いた金属担持触媒を調製し、燃料電池としての耐久性を以下の通りに評価した。
触媒種として白金を用い、電池性能は燃料電池測定装置を用い、初期性能、サイクル劣化試験で評価した。評価結果を表1に示す。
電池特性は、白金単位面積あたりの電流量(mA/cm2)で評価した。電池の耐久性は、低下率で評価した。低下率は次式で算出した。
低下率(%)={(初期特性−劣化後特性)/初期特性}×100
Claims (4)
- 炭素を含む棒状体または環状体が枝分かれした三次元構造を有する樹状の炭素メソポーラス構造体から成り、
窒素吸着等温線をDollimore−Heal法で解析して求まる細孔径1〜20nm及び積算細孔容積0.2〜1.5cc/gを有し、
粉末X線回折スペクトルが、回折角(2θ:度)20〜30度の間に、グラファイトの002回折線相当のピークを有し、且つ25.5〜26.5度に半値幅が0.1度〜1.0度のピークを有することを特徴とする触媒担体用炭素材料。 - BET比表面積が200m2/g〜1300m2/gであり、
25℃における相対圧10%での水蒸気吸着量(mL/g)(V10)と、炭素材料の窒素吸着BET比表面積(m2/g)(S)との比V10/S(mL/m2)が0.05×10-3〜1.0×10-3であること特徴とする請求項1に記載の触媒担体用炭素材料。 - 金属又は金属塩を含む溶液を準備する工程と、
前記溶液に対して超音波を印加した状態でアセチレンガスを吹き込み、前記金属を含む金属アセチリドから成る棒状体または環状体が枝分かれしてなる樹状の炭素ナノ構造体を生成させる工程と、
前記樹状の炭素ナノ構造体を60℃〜80℃の温度で加熱し、前記金属アセチリドの前記金属を偏析させ、前記樹状の炭素ナノ構造体中に、前記金属が内包されてなる金属内包樹状炭素ナノ構造物を作製する工程と、
前記金属内包樹状炭素ナノ構造物を160℃〜200℃まで加熱し、前記金属を噴出させ、表面及び内部に多数の噴出孔を有する樹状の炭素メソポーラス構造体を作製する工程と、
前記樹状の炭素メソポーラス構造体を、減圧雰囲気下又は不活性ガス雰囲気下で、1600℃〜2200℃温度で0.5時間〜4.0時間の加熱処理を行う工程と
を具えることを特徴とする、触媒担体用炭素材料の作製方法。 - 前記金属が銀であることを特徴とする請求項3に記載の触媒担体用炭素材料の作製方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013032456 | 2013-02-21 | ||
| JP2013032456 | 2013-02-21 | ||
| PCT/JP2014/054228 WO2014129597A1 (ja) | 2013-02-21 | 2014-02-21 | 触媒担体用炭素材料 |
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| Publication Number | Publication Date |
|---|---|
| JPWO2014129597A1 JPWO2014129597A1 (ja) | 2017-02-02 |
| JP6198810B2 true JP6198810B2 (ja) | 2017-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2015501524A Active JP6198810B2 (ja) | 2013-02-21 | 2014-02-21 | 触媒担体用炭素材料 |
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| Country | Link |
|---|---|
| US (1) | US20150352522A1 (ja) |
| EP (1) | EP2959970B1 (ja) |
| JP (1) | JP6198810B2 (ja) |
| KR (1) | KR101762258B1 (ja) |
| CN (1) | CN105073260B (ja) |
| CA (1) | CA2899131C (ja) |
| WO (1) | WO2014129597A1 (ja) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2910237C (en) | 2013-04-25 | 2019-01-15 | Nissan Motor Co., Ltd. | Catalyst and manufacturing method thereof, and electrode catalyst layer using the catalyst |
| EP2990116B1 (en) | 2013-04-25 | 2018-06-06 | Nissan Motor Co., Ltd | Catalyst, electrode catalyst layer using said catalyst, membrane electrode assembly, and fuel cell |
| JP6063039B2 (ja) * | 2013-05-16 | 2017-01-18 | トヨタ自動車株式会社 | 燃料電池用電極およびその製造方法 |
| CA2932709A1 (en) * | 2013-12-13 | 2015-06-18 | Nippon Steel & Sumitomo Metal Corporation | Carbon support material for use in a solid polymer fuel cell and method of production thereof |
| JP6173569B2 (ja) | 2014-03-31 | 2017-08-02 | 三井金属鉱業株式会社 | 膜電極接合体及びそれを用いた固体高分子形燃料電池 |
| JP6610255B2 (ja) * | 2014-06-23 | 2019-11-27 | 東レ株式会社 | 多孔質炭素材料 |
| CN107004864B (zh) * | 2014-10-29 | 2018-07-13 | 日产自动车株式会社 | 燃料电池用电极催化剂层、以及使用该催化剂层的燃料电池用膜电极接合体及燃料电池 |
| EP3214680B1 (en) * | 2014-10-29 | 2020-06-17 | Nissan Motor Co., Ltd | Electrode catalyst for fuel cell, electrode catalyst layer for fuel cell, method for producing same, and membrane electrode assembly and fuel cell using catalyst layer |
| JP6339220B2 (ja) * | 2014-10-29 | 2018-06-06 | 日産自動車株式会社 | 燃料電池用電極触媒層、その製造方法ならびに当該触媒層を用いる膜電極接合体および燃料電池 |
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| WO2016133132A1 (ja) | 2015-02-18 | 2016-08-25 | 新日鐵住金株式会社 | 触媒担体用炭素材料、固体高分子形燃料電池用触媒、固体高分子形燃料電池、及び触媒担体用炭素材料の製造方法 |
| JP2018081740A (ja) * | 2015-03-23 | 2018-05-24 | 日産自動車株式会社 | 燃料電池用炭素粉末ならびに当該燃料電池用炭素粉末を用いる触媒、電極触媒層、膜電極接合体および燃料電池 |
| CN107210449B (zh) * | 2015-03-26 | 2020-08-14 | 日铁化学材料株式会社 | 固体高分子型燃料电池用载体碳材料以及催化剂 |
| CN105633418B (zh) * | 2015-12-25 | 2018-09-14 | 华南理工大学 | 一种锂空电池阴极用Pt/UIO-66复合材料及其制法 |
| JP6347259B2 (ja) * | 2016-01-15 | 2018-06-27 | トヨタ自動車株式会社 | 燃料電池用触媒層の製造方法 |
| EP3429003B1 (en) * | 2016-03-11 | 2021-04-14 | Nissan Motor Co., Ltd. | Carbon powder for fuel cells, catalyst using said carbon powder for fuel cells, electrode catalyst layer, membrane electrode assembly and fuel cell |
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| EP2038217A1 (en) | 2006-05-31 | 2009-03-25 | Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. | Porous carbon electrode with conductive polymer coating |
| JP4764866B2 (ja) | 2007-04-25 | 2011-09-07 | 関西熱化学株式会社 | 触媒担体、触媒、触媒担体の製造方法、および触媒の製造方法 |
| JP5481748B2 (ja) * | 2007-12-12 | 2014-04-23 | 新日鉄住金化学株式会社 | 炭素ナノ構造体、金属内包樹状炭素ナノ構造物の作製方法、及び炭素ナノ構造体の作製方法 |
| US9017837B2 (en) * | 2008-02-19 | 2015-04-28 | Cabot Corporation | High surface area graphitized carbon and processes for making same |
| CN102007647B (zh) * | 2008-03-19 | 2015-03-18 | 皇家飞利浦电子股份有限公司 | 用于建立与传导带的电连接的连接器 |
| US8916296B2 (en) * | 2010-03-12 | 2014-12-23 | Energ2 Technologies, Inc. | Mesoporous carbon materials comprising bifunctional catalysts |
| JP5900015B2 (ja) * | 2012-02-28 | 2016-04-06 | 日産自動車株式会社 | 燃料電池 |
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| US20150352522A1 (en) | 2015-12-10 |
| EP2959970B1 (en) | 2018-12-05 |
| CA2899131C (en) | 2017-03-07 |
| JPWO2014129597A1 (ja) | 2017-02-02 |
| KR20150108868A (ko) | 2015-09-30 |
| EP2959970A1 (en) | 2015-12-30 |
| KR101762258B1 (ko) | 2017-07-28 |
| CN105073260B (zh) | 2018-04-06 |
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