KR101495045B1 - 비정질 실리콘산화물이 코팅된 탄소 복합체, 이의 제조방법 및 이를 이용한 연료전지용 전극촉매 - Google Patents
비정질 실리콘산화물이 코팅된 탄소 복합체, 이의 제조방법 및 이를 이용한 연료전지용 전극촉매 Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0219—Coating the coating containing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/18—Carbon
- B01J21/185—Carbon nanotubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
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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
- H01M4/92—Metals of platinum group
- H01M4/925—Metals of platinum group supported on carriers, e.g. powder carriers
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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
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Abstract
Description
도 2는 본 발명에 따른 실시예 1 내지 3에서 제조된 비정질 실리콘산화물이 코팅된 탄소 복합체의 열무게 측정 결과를 나타낸 그래프이다.
도 3은 본 발명에 따른 시험예 2에서 실시예 1에서 제조한 PS/PCNF를 300℃, 400℃, 500℃에서 각각 열처리한 비정질 실리콘산화물이 코팅된 탄소 복합체와 PCNF의 질소흡착에 대해 측정한 결과를 나타낸 그래프이다.
도 4는 본 발명에 따른 시험예 3에서 실시예 1에서 제조한 PS/PCNF를 400℃에서 열처리 시간을 2시간, 4시간, 8시간으로 달리하여 제조한 비정질 실리콘산화물이 코팅된 탄소 복합체의 질소흡착에 대해 측정한 결과를 나타낸 그래프이다.
도 5는 본 발명에 따른 시험예 4에서 실시예 1 내지 실시예 3의 샘플에 대해 400℃에서 1차 열처리를 한 후의 질소흡착을 측정한 결과를 나타낸 그래프이다.
도 6은 본 발명에 따른 시험예 5에서 1차 열처리(400℃, 2h, Air)를 한 후에 질소분위기에서 각각 다른 온도에서 2차 열처리한 후 제조된 실시예 1의 샘플에 대해 질소흡착을 측정한 결과를 나타낸 그래프이다.
도 7 의 (a) 및 (b)는 각각 실시예 1에서 사용된 플레이트리트-탄소나노섬유에 대해 촬영한 50000 배율의 SEM 사진 및 100000 배율의 SEM 사진이고, 도 7 의 (c) 및 (d)는 각각 본 발명에 따른 시험예 1에서의 샘플 5에 대해 촬영한 50000 배율의 SEM 사진 및 100000 배율의 SEM 사진이다.
도 8 의 (a) 및 (b)는 각각 본 발명에 따른 시험예 1에서의 샘플 14에 대해 촬영한 50000 배율의 SEM 사진 및 샘플 15에 대해 촬영한 50000 배율의 SEM 사진이다.
도 9의 (a) 및 (b)는 실시예 1에서 사용된 플레이트리트-탄소나노섬유에 대해 촬영한 TEM 사진이다.
도 10의 (a) 및 (b)는 본 발명에 따른 시험예 1에서의 샘플 14에 대해 촬영한 TEM 사진이고, 도 10의 (c) 및 (d)는 본 발명에 따른 시험예 1에서의 샘플 5에 대해 촬영한 TEM 사진이다.
도 11의 (a) 및 (b)는 발명에 따른 시험예 1에서의 샘플 15에 대해 촬영한 TEM 사진이고, 도 11의 (c) 및 (d)는 본 발명에 따른 시험예 1에서의 샘플 16에 대해 촬영한 TEM 사진이다.
도 12는 본 발명에 따른 시험예 8에서 40%Pt/PCNF와 40%Pt/실리카-PCNF의 내구성 테스트 전후의 CV 그래프이다.
도 13은 본 발명에 따른 시험예 8에서 40%Pt/PCNF와 40%Pt/실리카-PCNF의 내구성 테스트 전후의 ORR 그래프이다.
도 14는 본 발명에 따라 제조된 비정질 실리콘산화물이 코팅된 탄소 복합체를 개략적으로 나타낸 도면이다.
Claims (13)
- 탄소 소재 및 실란 고분자를 용매에 넣고 교반하여 탄소 소재의 표면에 실란 고분자를 코팅하는 단계;
상기 용매를 증발시키고 실란 고분자가 코팅된 탄소 복합체를 건조시키는 단계; 및
상기 실란 고분자가 코팅된 탄소 복합체를 건조시킨 후 분쇄하여 열처리시키는 단계를 포함하되,
상기 분쇄된 실란 고분자가 코팅된 탄소 복합체의 열처리는 1차 열처리 및 2차 열처리를 수행하여 이루어지고,
상기 분쇄된 실란 고분자가 코팅된 탄소 복합체의 1차 열처리는 공기 분위기 하에서 300~500℃에서 2 시간 동안 또는 산소 분위기 하에서 250~400 ℃에서 2 시간 동안 수행되며, 2차 열처리는 불활성 기체 분위기 하에서 600~1000 ℃에서 수행되고,
상기 실란 고분자:탄소 소재는 1~25:99~75 중량%로 혼합하여 교반하며,
상기 실란 고분자는 폴리카르보메틸실란인 것을 특징으로 하는 비정질 실리콘산화물이 코팅된 탄소 복합체의 제조방법.
- 청구항 1에 있어서,
상기 탄소 소재는 탄소나노튜브, 탄소나노섬유, 카본블랙, 활성탄 및 흑연으로 이루어진 군으로부터 선택되는 것을 특징으로 하는 비정질 실리콘산화물이 코팅된 탄소 복합체의 제조방법.
- 청구항 2에 있어서,
상기 탄소나노섬유는 플레이트리트-탄소나노섬유인 것을 특징으로 하는 비정질 실리콘산화물이 코팅된 탄소 복합체의 제조방법.
- 삭제
- 삭제
- 청구항 1에 있어서,
상기 용매는 탄화수소계 용매, 에테르계 용매, 극성 용매 또는 할로겐화 탄화수소계 유기 용매 중에서 선택되는 어느 하나의 용매이고, 상기 탄화수소계 용매는 n-펜탄, n-헥산, n-헵탄, n-옥탄, n-데칸, 디시클로펜탄, 벤젠, 톨루엔, 자일렌, 듀렌, 인덴, 테트라히드로나프탈렌, 데카히드로나프탈렌 및 스쿠알란으로 이루어진 군으로부터 선택되는 어느 하나의 용매이며, 상기 에테르계 용매는 디프로필 에테르, 에틸렌 글리콜 디메틸 에테르, 에틸렌 글리콜 디에틸 에테르, 에틸렌 글리콜 메틸 에틸 에테르, 디에틸렌 글리콜 디메틸 에테르, 디에틸렌 글리콜 디에틸 에테르, 디에틸렌 글리콜 메틸 에틸 에테르, 테트라히드로푸란, 테트라히드로피란 및 p-디옥산으로 이루어진 군으로부터 선택되는 어느 하나의 용매이고, 상기 극성 용매는 프로필렌 카르보네이트, γ-부티로락톤, N-메틸-2-피롤리돈, 디메틸 포름아미드, 아세토니트릴 및 디메틸 술폭시드로 이루어진 군으로부터 선택되는 어느 하나의 용매이며, 상기 할로겐화 탄화수소계 유기 용매는 사염화탄소, 클로로포름, 1,2-디클로로에탄, 디클로로-메탄 및 클로로벤젠으로 이루어진 군으로부터 선택되는 어느 하나의 용매인 것을 특징으로 하는 비정질 실리콘산화물이 코팅된 탄소 복합체의 제조방법.
- 삭제
- 삭제
- 삭제
- 청구항 1 내지 청구항 3, 청구항 6 중 어느 한 항에 따라 제조된 비정질 실리콘산화물이 코팅된 탄소 복합체.
- 청구항 10에 있어서,
실리콘산화물층이 표면에 0.5~5 nm로 코팅된 것을 특징으로 하는 비정질 실리콘산화물이 코팅된 탄소 복합체.
- 청구항 11에 따른 실리콘산화물이 코팅된 탄소 복합체의 담지체 및 상기 담지체에 담지된 활성 금속촉매를 포함하는 연료전지용 전극촉매.
- 청구항 12에 있어서,
상기 활성 금속촉매는 백금 또는 백금-루테늄 합금인 것을 특징으로 하는 연료전지용 전극촉매.
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