CAS OpenIR  > 研究所(批量导入)
Pt Nanoparticles Supported on Nitrogen-Doped Porous Carbon Nanospheres as an Electrocatalyst for Fuel Cells
Alternative TitleChem. Mat.
Su, Fabing1,2; Tian, Zhiqun1; Poh, Chee Kok1; Wang, Zhan1; Lim, San Hua1; Liu, Zhaolin3; Lin, Jianyi1
2010-02-09
Source PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Volume22Issue:3Pages:832-839
AbstractNitrogen-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.; 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.
KeywordOriented Pyrolytic-graphite Ordered Mesoporous Carbon Oxygen Reduction Reaction Methanol Oxidation Electrochemical Impedance Catalyst Support Platinum Nanoparticles Microporous Carbons Anode Catalyst Cnx Nanotubes
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/cm901542w
URL查看原文
Indexed BySCI
Language英语
WOS KeywordORIENTED PYROLYTIC-GRAPHITE ; ORDERED MESOPOROUS CARBON ; OXYGEN REDUCTION REACTION ; METHANOL OXIDATION ; ELECTROCHEMICAL IMPEDANCE ; CATALYST SUPPORT ; PLATINUM NANOPARTICLES ; MICROPOROUS CARBONS ; ANODE CATALYST ; CNX NANOTUBES
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000274089600026
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6462
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
Files in This Item:
File Name/Size DocType Version Access License
Pt Nanoparticles Sup(2375KB) 限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Su, Fabing]'s Articles
[Tian, Zhiqun]'s Articles
[Poh, Chee Kok]'s Articles
Baidu academic
Similar articles in Baidu academic
[Su, Fabing]'s Articles
[Tian, Zhiqun]'s Articles
[Poh, Chee Kok]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Su, Fabing]'s Articles
[Tian, Zhiqun]'s Articles
[Poh, Chee Kok]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.