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	Electrochemical Behavior of Pt Nanoparticles Supported on Meso- and Microporous Carbons for Fuel Cells
	Su, Fabing1,2; Poh, Chee Kok2; Tian, Zhigun2; Xu, Guangwen1; Koh, Guangyong2; Wang, Zhan2; Liu, Zhaolin3; Lin, Jianyi2
刊名	ENERGY & FUELS
	2010-07-01
卷号	24期号:7页码:3727-3732
关键词	methanol oxidation ptru nanoparticles catalyst support anode catalysts porous carbon impedance hydrogenation performance nanotubes co
ISSN号	0887-0624
其他题名	Energy Fuels
中文摘要	Porous structure of the electrocatalyst support is of importance for mass transfer of reactants and products in electrochemical reactions of fuel cells. This study reports the comparative investigation of the electrochemical performance of Pt nanoparticles supported on the meso- and microporous carbons as well as commercial Pt catalyst E-TEK (40 wt % Pt loading) for the methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) in fuel cells, Ordered mesoporous carbon (OM C) synthesized using the template method was employed as the representative of mesoporous carbon, and carbon black BP2000 was used as the microporous carbon because of Us microporous structure with a high surface area comparable to that of OMC. The samples were characterized by nitrogen adsorption, X-ray diffraction, small-angle X-ray scattering, thermogravimetric analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that, for M OR, the Pt/OMC catalyst possessed a significantly higher catalytic activity measured by cyclic voltammetry than that of Pt/BP2000 and its performance even exceeded that of commercial catalyst E-TEK. The electrochemical impedance measurement indicated that Pt/OMC has a smaller charge-transfer resistance and faster overall MOR rate than both Pt/BP2000 and E-TEK catalysts. In contrast, for ORR, the mass activity of Pt/BP2000 is higher than that of Pt/OMC on a rotating disk electrode but comparable to that of E-TEK. The study may suggest that the mesoporous structure of the carbon support is important for liquid-phase electrochemical reactions, while micropores are more suitable for gas reactions at the electrodes of fuel cells. This work would be helpful in understanding the molecular transport of reactants and products in the pore nanostructure of carbon-supported Pt electrocatalysts for fuel cell application.
英文摘要	Porous structure of the electrocatalyst support is of importance for mass transfer of reactants and products in electrochemical reactions of fuel cells. This study reports the comparative investigation of the electrochemical performance of Pt nanoparticles supported on the meso- and microporous carbons as well as commercial Pt catalyst E-TEK (40 wt % Pt loading) for the methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) in fuel cells, Ordered mesoporous carbon (OM C) synthesized using the template method was employed as the representative of mesoporous carbon, and carbon black BP2000 was used as the microporous carbon because of Us microporous structure with a high surface area comparable to that of OMC. The samples were characterized by nitrogen adsorption, X-ray diffraction, small-angle X-ray scattering, thermogravimetric analysis, transmission electron microscopy, and X-ray photoelectron spectroscopy. The results showed that, for M OR, the Pt/OMC catalyst possessed a significantly higher catalytic activity measured by cyclic voltammetry than that of Pt/BP2000 and its performance even exceeded that of commercial catalyst E-TEK. The electrochemical impedance measurement indicated that Pt/OMC has a smaller charge-transfer resistance and faster overall MOR rate than both Pt/BP2000 and E-TEK catalysts. In contrast, for ORR, the mass activity of Pt/BP2000 is higher than that of Pt/OMC on a rotating disk electrode but comparable to that of E-TEK. The study may suggest that the mesoporous structure of the carbon support is important for liquid-phase electrochemical reactions, while micropores are more suitable for gas reactions at the electrodes of fuel cells. This work would be helpful in understanding the molecular transport of reactants and products in the pore nanostructure of carbon-supported Pt electrocatalysts for fuel cell application.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Energy & Fuels ; Engineering, Chemical
研究领域[WOS]	Energy & Fuels ; Engineering
关键词[WOS]	METHANOL OXIDATION ; PTRU NANOPARTICLES ; CATALYST SUPPORT ; ANODE CATALYSTS ; POROUS CARBON ; IMPEDANCE ; HYDROGENATION ; PERFORMANCE ; NANOTUBES ; CO
收录类别	SCI ; ISTP
原文出处	://WOS:000281029600004
语种	英语
WOS记录号	WOS:000281029600004
公开日期	2013-11-28
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/6320]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Inst Chem Engn & Sci, Singapore 6278332, Singapore 3.Inst Mat Res & Engn, Singapore 117602, Singapore
推荐引用方式 GB/T 7714	Su, Fabing,Poh, Chee Kok,Tian, Zhigun,et al. Electrochemical Behavior of Pt Nanoparticles Supported on Meso- and Microporous Carbons for Fuel Cells[J]. ENERGY & FUELS,2010,24(7):3727-3732.
APA	Su, Fabing.,Poh, Chee Kok.,Tian, Zhigun.,Xu, Guangwen.,Koh, Guangyong.,...&Lin, Jianyi.(2010).Electrochemical Behavior of Pt Nanoparticles Supported on Meso- and Microporous Carbons for Fuel Cells.ENERGY & FUELS,24(7),3727-3732.
MLA	Su, Fabing,et al."Electrochemical Behavior of Pt Nanoparticles Supported on Meso- and Microporous Carbons for Fuel Cells".ENERGY & FUELS 24.7(2010):3727-3732.

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