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Electrocatalytic property of Pt-Sn anode catalyst for electro-oxidation of ethanol
Zhao, XS; Jiang, LH; Sun, GQ; Yang, SH; Yi, BL; Xin, Q
KeywordDirect Ethanol Fuel Cell Platinum Tin Alternating Current Impedance Method Fuel Crossover
Source PublicationCHINESE JOURNAL OF CATALYSIS
2004-12-01
Volume25Issue:12Pages:983-988
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordMETHANOL FUEL-CELLS ; AC-IMPEDANCE SPECTROSCOPY ; CO-TOLERANCE ; OXIDATION ; ELECTRODE ; PLATINUM ; TEMPERATURE ; PERFORMANCE ; MECHANISM ; DAFC
AbstractEthanol was used as an anode fuel for polymer electrolyte fuel cells, and the electro-oxidation of ethanol on Pt-Sn/C and Pt-Ru/C was investigated by voltammetry and alternating current impedance method. The apparent diffusion coefficients of ethanol and methanol through the Nafion 117 membrane at different temperatures were compared. It was found that the apparent diffusion coefficient of ethanol was lower than that of methanol under the same condition. The temperature dependence of ethanol electro-oxidation property on Pt-Sn/ C and Pt-Ru/C electrode was conducted by voltammetry method. In the temperature range of 30similar to90 degreesC .the Pt-Sn/C showed superior electrocatalytic property comparing with Pt-Ru/C. For example, the onset potential of Pt-Sn/C electrode was approximately 0.2 V lower than that of Pt-Ru/C at the tested temperatures. At the same potential, the current density of ethanol electro-oxidation on Pt-Sn/C electrode was about 20-60 mA/cm(2) higher than that on Pt-Ru/C, and the value difference increased with the increase of temperature. Impedance measurements were carried out to interpret the reaction mechanism of ethanol electro-oxidation. The result showed that Pt-Sn/C had higher catalytic activity for ethanol oxidation. In addition, the direct ethanol fuel cells with Pt-Sn/C electrode exhibited better performance, the peak power density was 44 mW/cm(2), and it was only 27 mW/cm(2) for single cell with Pt-Ru/C electrode using oxygen as oxidant at 90 degreesC.
Language英语
WOS IDWOS:000226325900012
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/138440
Collection中国科学院大连化学物理研究所
AffiliationChinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Zhao, XS,Jiang, LH,Sun, GQ,et al. Electrocatalytic property of Pt-Sn anode catalyst for electro-oxidation of ethanol[J]. CHINESE JOURNAL OF CATALYSIS,2004,25(12):983-988.
APA Zhao, XS,Jiang, LH,Sun, GQ,Yang, SH,Yi, BL,&Xin, Q.(2004).Electrocatalytic property of Pt-Sn anode catalyst for electro-oxidation of ethanol.CHINESE JOURNAL OF CATALYSIS,25(12),983-988.
MLA Zhao, XS,et al."Electrocatalytic property of Pt-Sn anode catalyst for electro-oxidation of ethanol".CHINESE JOURNAL OF CATALYSIS 25.12(2004):983-988.
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