It is necessary to fabricate uniformly dispersed nanoscale catalyst materials with high activity and long-term stability for polymer electrolyte membrane fuel cells with excellent electrochemical characteristics of the oxygen reduction reaction and hydrogen oxidation reaction. Platinum is known as the best noble metal catalyst for polymer electrolyte membrane fuel cells because of its excellent catalytic activity. However, given that Pt is expensive, considerable efforts have been made to reduce the amount of Pt loading for both anode and cathode catalysts. Meanwhile, the atomic layer deposition (ALD) method shows excellent uniformity and precise particle size controllability over the three-dimensional structure. The research progress on noble metal ALD, such as Pt, Ru, Pd, and various metal alloys, is presented in this review. ALD technology enables the development of polymer electrolyte membrane fuel cells with excellent reactivity and durability.

Abstract
1. 서 론
2. 원자층증착법을 이용한 귀금속 증착 공정 동향
    2.1 Platinum(Pt) ALD
    2.2 Palladium(Pd) ALD
    2.3 Bimetal ALD
3. 원자층증착법을 이용한 고분자 전해질 연료전지 성능 향상 연구 동향
    3.1 원자층증착법을 이용한 수소 고분자 전해질 연료전지용 촉매 소재 연구
    3.2 원자층증착법을 이용한 직접 알코올 연료전지용 촉매 소재 연구
    3.3 원자층증착법을 이용한 고분자 전해질 연료전지 촉매 보호층 연구
4. 요약 및 결론
References

• 한정환(서울과학기술대학교 신소재공학과) | Jeong Hwan Han (Department of Materials Science and Engineering, Seoul National University of Science and Technology) Corresponding Author