Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Ethanol Electro-Oxidation and Stability of Pt Supported on Sb-Doped Tin Oxide

안티몬 도핑된 주석 산화물에 담지된 백금 촉매의 에탄올 산화 반응 및 안정성 연구

  • Lee, Kug-Seung (School of Chemical & Biological Engineering & Research Center for Energy Conversion & Storage, Seoul National University) ;
  • Park, Hee-Young (School of Chemical & Biological Engineering & Research Center for Energy Conversion & Storage, Seoul National University) ;
  • Jeon, Tae-Yeol (School of Chemical & Biological Engineering & Research Center for Energy Conversion & Storage, Seoul National University) ;
  • Sung, Yung-Eun (School of Chemical & Biological Engineering & Research Center for Energy Conversion & Storage, Seoul National University)
  • 이국승 (서울대학교 화학생물공학부 및 에너지 변환 저장 연구센터) ;
  • 박희영 (서울대학교 화학생물공학부 및 에너지 변환 저장 연구센터) ;
  • 전태열 (서울대학교 화학생물공학부 및 에너지 변환 저장 연구센터) ;
  • 성영은 (서울대학교 화학생물공학부 및 에너지 변환 저장 연구센터)
  • Published : 2008.08.31
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Abstract

Electrocatalytic activities and stabilities of Pt supported on Sb-doped $SnO_2$ (ATO) were examined for ethanol oxidation reactions. Pt colloidal particles were deposited on ATO nanoparticles (Pt/ATO) and the prepared electrocatalysts were characterized by X-ray diffraction, transmission electron microscopy (TEM), and cyclic voltammetry. Electrochemical activity of the Pt/ATO for ethanol electro-oxidation was compared to those of Pt supported on carbon (Pt/C) and commercial PtRu/C. The activitiy of the Pt/ATO was much higher than those of the Pt/C and commercial PtRu/C. The Pt/ATO exhibited much higher electrochemical stabilities than the Pt/C in 0.5M ${H_2}{SO_4}$ and in 0.5M ${H_2}{SO_4}$/1M ${C_2}{H_5}OH$. According to TEM, the growth rate of Pt particles was lower in the Pt/ATO than it was in the Pt/C. The ATO nanoparticle appears to be a promising support material that promotes electrochemical reactions and stabilizes catalyst particles in direct ethanol fuel cell.

안티몬 도핑된 주석 산화물(ATO)에 담지된 백금 촉매(Pt/ATO)의 에탄올 산화반응에 대한 활성과 전기화학적 안정성을 평가하였다. Pt 콜로이드 입자를 ATO 입자에 담지하여 Pt/ATO 촉매를 제조하였으며, 제조된 촉매는 X-ray diffraction, transmission electron microscopy (TEM), 그리고 cyclic voltammetry를 이용하여 평가하였다. Pt/ATO 촉매의 에탄올 산화 활성은 Pt/C, PtRu/C에 비해 크게 우수하였다. Pt/ATO 촉매의 전기화학적 안정성 또한 Pt/C에 비해 우수하였으며, TEM 사진을 통하여 확인한 결과 Pt/ATO의 안정성은 Pt입자의 성장 속도가 Pt/C에 비해 느리기 때문인 것으로 확인되었다. 위의 결과로부터 ATO 나노입자가 직접 에탄올 연료전지용 담지체로서, 활성 및 안정성 향상을 기대할 수 있는 물질임을 확인하였다.

Keywords

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