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

정동원; 박순; 안치영; 최성호; 김준범

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자료유형: 학술저널

저자정보: 정동원 (울산대학교 첨단소재공학부) 박순 (울산대학교 첨단소재공학부) 안치영 (울산대학교 생명화학공학부) 최성호 (울산대학교 생명화학공학부) 김준범 (울산대학교 생명화학공학부)

저널정보: 한국재료학회 한국재료학회지 한국재료학회지 제19권 제12호

발행연도: 2009.1

수록면: 667 - 673 (7page)

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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.

#Pt alloy catalyst #carbon nanotubes #polymer electrolyte membrane fuel cell #oxygen reduction reaction

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