화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.21, No.3, 180-186, March, 2011
DOI10.3740/MRSK.2011.21.3.180  Export Citation
Polymer Electrolyte Membrane Fuel Cells용 Pt/C 캐소드 전극촉매 특성에 미치는 반응 온도
Various Temperatures Affecting Characteristics of Pt/C Cathode Catalysts for Polymer Electrolyte Membrane Fuel Cells
유성열, 강석민, 이진아, 이충균1, 류호진†
  • 한국화학연구원 에너지소재센터
  • 1충남대학교 분석과학기술대학원
Sungyeol Yoo, Suk-Min Kang, Jina Lee, Choong Kyun Rhee1, and Hojin Ryu†
  • Korea Research Institute of Chemical Technology, Energy Materials Center, Deajeon 305-600, Korea
  • 1Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon 305-704, Korea
E-mail:
This study is aimed to increase the activity of cathodic catalysts for PEMFCs(Polymer Electrolyte Membrane Fuel Cells). we investigated the temperature effect of 20wt% Pt/C catalysts at five different temperatures. The catalysts were synthesized by using chemical reduction method. Before adding the formaldehyde as reducing agent, process was undergone for 2 hours at the room temperature (RT), 40oC, 60oC, 80oC and 100oC, respectively. The performances of synthesize catalysts are compared. The electrochemical oxygen reduction reaction (ORR) was studied on 20wt% Pt/C catalysts by using a glassy carbon electrode through cyclic voltammetric curves (CV) in a 1M H2SO4 solution. The ORR specific activities of 20wt% Pt/C catalysts increased to give a relative ORR catalytic activity ordering of 80oC > 100oC>60oC>40oC > RT. Electrochemical active surface area (EAS) was calculated with cyclic voltammetry analysis. Prepared Pt/C (at 80oC, 100oC) catalysts has higher ESA than other catalysts. Physical characterization was made by using X-ray diffraction (XRD) and transmission electron microscope (TEM). The TEM images of the carbon supported platinum electrocatalysts (80oC, 100oC) showed homogenous particle distribution with particle size of about 2~3.5 nm. We found that a higher reaction temperature resulted in more uniform particle distribution than lower reaction temperature and then the XRD results showed that the crystalline structure of the synthesized catalysts are seen FCC structure.
Keywords:PEMFC catalyst;temperature;ORR (Oxygen Reduction Reaction);particle distribution
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