고분자 전해질 연료전지용 산소환원반응을 위한 비백금촉매의 활성에 대한 최신 연구 동향
Recent advances in Studies of the Activity of Non-precious Metal Catalysts for the Oxygen Reduction Reaction in Polymer Electrolyte Membrane Fuel Cells
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초록
수소의 화학반응 에너지를 직접 전기 에너지로 변환하는 Polymer electolyte membrane fuel cells (PEMFCs)는 친환경 미래 운송수단 에너지원의 한 종류이다. PEMFCs의 내부에 산소 환원 반응이 매우 느리고 고가의 백금을 사용하기 때문에 이를 대체하려는 연구가 국내외에서 매우 활발히 연구되고 있다. 하지만 백금이외에 값싼 재료를 이용한 촉매의 경우 여전히 성능이매우 상이하며 활성 향상에 대한 지표 등이 다양하다. 이에 본 총설은 non-precious metal catalyst (NPMC)의 활성 지표 등을 정리하고 최근 5년간의 자료를 요약하였다. 이를 통해 촉매재료의 선별, 합성시 주안점, 조촉매 등을 설명하며, 촉매 활성에 대한 연구의 필요성을 상기 시킬 수 있다. 이를 통해 귀금속 촉매가 널리 사용되는 분야에 적용할 수 있는 NPMC의 연구및 개발에 기여할 수 있을 것으로 보인다. 또한 향후 연구개발의 최종적인 목표를 기술한다.
Abstract
Polymer electrolyte membrane fuel cells, which convert the chemical reaction energy of hydrogen into electric power directly, are a type of eco-friendly power for future vehicles. Due to the sluggish oxygen reduction reaction and costly Pt catalyst in the cathode, the research related to the replacement of Pt-based catalysts has been vitally carried out. In this case, however, the performance is significantly different from each other and a variety of factors have existed. In this review paper, we rearrange and summarize relevant papers published within 5 years approximately. The selection of precursors, synthesis method, and co-catalyst are represented as a core factor, while the necessity of research for the further enhancement of activity may be raised. It can be anticipated to contribute to the replacement of precious metal catalysts in the various fields of study. The final objective of the future research is depicted in detail.
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