Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Synthesis and Oxygen Reduction Reaction Characteristics of Multi-Walled Carbon Nanotubes Supported PtxM(1-x) (M = Co, Cu, Ni) Alloy Catalysts for Polymer Electrolyte Membrane Fuel Cell

다중벽 탄소 나노 튜브에 담지한 PtxM(1-x)(M = Co, Cu, Ni) 합금촉매의 제조 및 고분자 전해질 연료전지에서 산소환원 특성

  • Jung, Dong-Won (School of Materials Science and Engineering, Ulsan University) ;
  • Park, Soon (School of Materials Science and Engineering, Ulsan University) ;
  • Ahn, Chi-Yeong (School of Chemical engineering & Bioengineering, Ulsan University) ;
  • Choi, Seong-Ho (School of Chemical engineering & Bioengineering, Ulsan University) ;
  • Kim, Jun-Bom (School of Chemical engineering & Bioengineering, Ulsan University)
  • 정동원 (울산대학교 첨단소재공학부) ;
  • 박순 (울산대학교 첨단소재공학부) ;
  • 안치영 (울산대학교 생명화학공학부) ;
  • 최성호 (울산대학교 생명화학공학부) ;
  • 김준범 (울산대학교 생명화학공학부)
  • Published : 2009.12.27
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Abstract

The electrocatalytic characteristics of oxygen reduction reaction of the $PtxM_{(1-x)}$ (M = Co, Cu, Ni) supported on multi-walled carbon nanotubes (MWNTs) have been evaluated in a Polymer Electrolyte Membrane Fuel Cell (PEMFC). The $Pt_xM_{(1-x)}$/MWNTs catalysts with a Pt : M atomic ratio of about 3 : 1 were synthesized and applied to the cathode of PEMFC. The crystalline structure and morphology images of the $Pt_xM_{(1-x)}$ particles were characterized by X-ray diffraction and transmission electron microscopy, respectively. The results showed that the crystalline structure of the Pt alloy particles in Pt/MWNTs and $Pt_xM_{(1-x)}$/MWNTs catalysts are seen as FCC, and synthesized $Pt_xM_{(1-x)}$ crystals have lattice parameters smaller than the pure Pt crystal. According to the electrochemical surface area (ESA) calculated with cyclic voltammetry analysis, $Pt_{0.77}Co_{0.23}$/MWNTs catalyst has higher ESA than the other catalysts. The evaluation of a unit cell test using Pt/MWNTs or $Pt_xM_{(1-x)}$/MWNTs as the cathode catalysts demonstrated higher cell performance than did a commercial Pt/C catalyst. Among the MWNTs-supported Pt and $Pt_xM_{(1-x)}$ (M = Co, Cu, Ni) catalysts, the $Pt_{0.77}Co_{0.23}$/MWNTs shows the highest performance with the cathode catalyst of PEMFC because they had the largest ESA.

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