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논문 기본 정보
- 자료유형
- 동향자료
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 198 - 202 (5page)
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Carbon-supported Pt catalyst systems containing defect adsorption sites on the anode of direct methanol fuel cells were investigated, to elucidate the mechanisms of H<sub>2</sub> dissociation and carbon monoxide (CO) poisoning. Density functional theory calculations were carried out to determine the effect of defect sites located neighboring to or distant from the Pt catalyst on H<sub>2</sub> and CO adsorption properties, based on electronic properties such as adsorption energy and electronic band gap. Interestingly, the presence of neighboring defect sites led to a reduction of H<sub>2</sub> dissociation and CO poisoning due to atomic Pt filling the defect sites. At distant sites, H<sub>2</sub> dissociation was active on Pt, but CO filled the defect sites to form carbon π-π bonds, thus enhancing the oxidation of the carbon surface. It should be noted that defect sites can cause CO poisoning, thereby deactivating the anode gradually.
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참고문헌 (30)
참고문헌 신청
Zhi-Gang Shao / 2006 / PtRu/Ti anodes with varying Pt ? Ru ratio prepared by electrodeposition for the direct methanol fuel cell / Physical Chemistry Chemical Physics 8(23):2720
R. Dillon / 2004 / International activities in DMFC R&D: status of technologies and potential applications / Journal of Power Sources 127(1-2):112~126
Claude Lamy / 2002 / Recent advances in the development of direct alcohol fuel cells (DAFC) / Journal of Power Sources 105(2):283~296
N. S. Veizaga / 2014 / Promoting Effect of Tin in Platinum Electrocatalysts for Direct Methanol Fuel Cells (DMFC) / Journal of the Electrochemical Society 162(3):F243~F249
Julien Courtois / 2014 / Screening iridium-based bimetallic alloys as catalysts for direct ethanol fuel cells / Applied Catalysis A: General 483:85~96
R. Dillon / 2004 / International activities in DMFC R&D: status of technologies and potential applications / Journal of Power Sources 127(1-2):112~126
Claude Lamy / 2002 / Recent advances in the development of direct alcohol fuel cells (DAFC) / Journal of Power Sources 105(2):283~296
N. S. Veizaga / 2014 / Promoting Effect of Tin in Platinum Electrocatalysts for Direct Methanol Fuel Cells (DMFC) / Journal of the Electrochemical Society 162(3):F243~F249
Julien Courtois / 2014 / Screening iridium-based bimetallic alloys as catalysts for direct ethanol fuel cells / Applied Catalysis A: General 483:85~96
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