Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells

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	Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells
	Su, Fabing 1,2; Tian, Zhiqun 1; Poh, Chee Kok 1; Wang, Zhan 1; Lim, San Hua 1; Liu, Zhaolin 3; Lin, Jianyi 1
刊名	CHEMISTRY OF MATERIALS
	2010-02-09
卷号	22 期号:3 页码:832-839
关键词	oriented pyrolytic-graphite ordered mesoporous carbon oxygen reduction reaction methanol oxidation electrochemical impedance catalyst support platinum nanoparticles microporous carbons anode catalyst cnx nanotubes
ISSN号	0897-4756
其他题名	Chem. Mat.
中文摘要	Nitrogen-doped porous carbon nanospheres (PCNs) with a high surface area were prepared by chemical activation of nonporous carbon nanospheres (CNs). CNs were obtained via carbonization of polypyrrole nanospheres (PNs) that were synthesized by ultrasonic polymerization of pyrrole. The catalysts Pt/PCN, Pt/CN, and Pt/PN were prepared by depositing Pt nanoparticles on supports PCNs, CNs, and PNs, respectively, using ethylene glycol chemical reduction. Nitrogen adsorption, X-ray diffraction, thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were employed to characterize samples. It was found that after chemical activation using KOH, PCNs containing N functional groups (mainly N-6 and N-Q) possessed a microporous structure with a high surface area of 10 10 m(2)/g and a particle size of less than 100 nm. The electrochemical properties of samples Pt/PCN, Pt/CN, and Pt/PN, together with commercial catalysts E-TEK (40 wt % Pt loading), were comparatively investigated in methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) for fuel cells. The results showed that the catalytic activity of Pt/PN toward both reactions at room temperature is almost negligible possibly due to the poor conductivity of support PNs proven by impedance spectroscopy, in contrast with some literature reports. Compared to Pt/CN and E-TEK catalyst, Pt/PCN revealed an enhanced mass activity in ORR and MOR because of the high dispersion of small Pt nanoparticles, the presence of nitrogen species, and developed microporous structure of support PCNs.
英文摘要	Nitrogen-doped porous carbon nanospheres (PCNs) with a high surface area were prepared by chemical activation of nonporous carbon nanospheres (CNs). CNs were obtained via carbonization of polypyrrole nanospheres (PNs) that were synthesized by ultrasonic polymerization of pyrrole. The catalysts Pt/PCN, Pt/CN, and Pt/PN were prepared by depositing Pt nanoparticles on supports PCNs, CNs, and PNs, respectively, using ethylene glycol chemical reduction. Nitrogen adsorption, X-ray diffraction, thermogravimetric analysis, transmission electron microscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy were employed to characterize samples. It was found that after chemical activation using KOH, PCNs containing N functional groups (mainly N-6 and N-Q) possessed a microporous structure with a high surface area of 10 10 m(2)/g and a particle size of less than 100 nm. The electrochemical properties of samples Pt/PCN, Pt/CN, and Pt/PN, together with commercial catalysts E-TEK (40 wt % Pt loading), were comparatively investigated in methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR) for fuel cells. The results showed that the catalytic activity of Pt/PN toward both reactions at room temperature is almost negligible possibly due to the poor conductivity of support PNs proven by impedance spectroscopy, in contrast with some literature reports. Compared to Pt/CN and E-TEK catalyst, Pt/PCN revealed an enhanced mass activity in ORR and MOR because of the high dispersion of small Pt nanoparticles, the presence of nitrogen species, and developed microporous structure of support PCNs.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Materials Science
关键词[WOS]	ORIENTED PYROLYTIC-GRAPHITE ; ORDERED MESOPOROUS CARBON ; OXYGEN REDUCTION REACTION ; METHANOL OXIDATION ; ELECTROCHEMICAL IMPEDANCE ; CATALYST SUPPORT ; PLATINUM NANOPARTICLES ; MICROPOROUS CARBONS ; ANODE CATALYST ; CNX NANOTUBES
收录类别	SCI
原文出处	://WOS:000274089600026
语种	英语
WOS记录号	WOS:000274089600026
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/122111/6462]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Inst Chem Engn & Sci, Singapore 627833, Singapore 2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China 3.Inst Mat Res & Engn, Singapore 117602, Singapore
推荐引用方式 GB/T 7714	Su, Fabing,Tian, Zhiqun,Poh, Chee Kok,et al. Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells[J]. CHEMISTRY OF MATERIALS,2010,22(3):832-839.
APA	Su, Fabing.,Tian, Zhiqun.,Poh, Chee Kok.,Wang, Zhan.,Lim, San Hua.,...&Lin, Jianyi.(2010).Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells.CHEMISTRY OF MATERIALS,22(3),832-839.
MLA	Su, Fabing,et al."Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells".CHEMISTRY OF MATERIALS 22.3(2010):832-839.