DOI QR코드

DOI QR Code

연료전지 전극촉매용 팔라듐 나노입자 형상 제어 및 산소환원반응 성능 평가

Preparation of Shape-Controlled Palladium Nanoparticles for Electrocatalysts and Their Performance Evaluation for Oxygen Reduction Reaction

  • 김경희 (한국에너지기술연구원 연료전지연구실) ;
  • 이정돈 (한국에너지기술연구원 연료전지연구실) ;
  • 이효준 (한국에너지기술연구원 연료전지연구실) ;
  • 박석희 (한국에너지기술연구원 연료전지연구실) ;
  • 임성대 (한국에너지기술연구원 연료전지연구실) ;
  • 정남기 (충남대학교 에너지과학기술대학원) ;
  • 박구곤 (한국에너지기술연구원 연료전지연구실)
  • KIM, KYOUNG-HEE (Fuel Cell Laboratory, Korea Institute of Energy Research) ;
  • LEE, JUNG-DON (Fuel Cell Laboratory, Korea Institute of Energy Research) ;
  • LEE, HYOJUNE (Fuel Cell Laboratory, Korea Institute of Energy Research) ;
  • PARK, SEOK-HEE (Fuel Cell Laboratory, Korea Institute of Energy Research) ;
  • YIM, SUNG-DAE (Fuel Cell Laboratory, Korea Institute of Energy Research) ;
  • JUNG, NAMGEE (Graduate School of Energy Science and Technology, Chungnam National University) ;
  • PARK, GU-GON (Fuel Cell Laboratory, Korea Institute of Energy Research)
  • 투고 : 2018.10.01
  • 심사 : 2018.10.30
  • 발행 : 2018.10.30

초록

To design the practical core-shell electrocatalysts, combination of core and shell materials is important to meet catalytic activity and durability target. In general, Pd is considered as a good core material due to its best activity caused by strain/ligand effect. Preparing Pd nanoparticles can be a starting point in fabricating core-shell type electrocatalysts, much simplified Pd preparing process is suggested by using carbon monoxide (CO) as a reducing agent and/or capping agent. The solvent composition and reaction temperature can control to nanosheet, tetrahedron, and sphere without using additional stabilizer. Among them, Pd nanosheet which has mainly (111) plane showed about 3 times higher electrocatalytic activity for oxygen reduction reaction (ORR) to the spherical Pd nanoparticles. The enhanced ORR activity of Pd nanosheets can be attributed to the exposure of Pd (111) surface and the high electrochemical surface area. Therefore, we demonstrated that the shape of Pd nanomaterials is easily controlled via a facile reduction method using CO, and (111) plane-oriented Pd nanosheets can be a promising ORR catalysts and core material for polymer electrolyte fuel cells (PEFCs).

키워드

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