https://scholars.lib.ntu.edu.tw/handle/123456789/616391
標題: | Ultrafine platinum nanoparticles uniformly dispersed on arrayed CN x nanotubes with high electrochemical activity | 作者: | Sun C.-L. Chen L.-C. Su M.-C. Hong L.-S. Chyan O. Hsu C.-Y. Chen K.-H. Chang T.-F. Chang L. LI-CHYONG CHEN |
公開日期: | 2005 | 卷: | 17 | 期: | 14 | 起(迄)頁: | 3749-3753 | 來源出版物: | Chemistry of Materials | 摘要: | The structure and electrochemical properties of arrayed nitrogen-containing carbon nanotube (CM x NT)-platinum nanoparticle (Pt NP) composites directly grown on Si substrates have been investigated. The CN x nanotube arrays were grown by microwave-plasma-enhanced chemical vapor deposition first and then acted as the template and support for Pt dispersion in the following sputtering process. Under the same sputtering conditions, it was found that well-separated Pt NPs would form with an average diameter of 2 nm on the arrayed NTs while a continuous Pt thin film was observed on the bare Si substrate. X-ray photoelectron spectroscopy (XPS), X-ray diffraction, and electron microscopy were employed to study bonding and structure changes with increasing deposition time. Implications of the C1s and N1s bonding changes in XPS and their possible relation to the NT-Pt composite structures with self-limited size distribution are discussed. Cyclic voltammograms show well-behaved curves in methanol oxidation, suggesting an efficient electronic conduction mechanism from the substrate via CN x NTs to reach individual Pt NPs is in operation. Such an integrated nanocomposite approach possesses a high potential for micro direct methanol fuel cell applications. © 2005 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-22944477997&doi=10.1021%2fcm050107r&partnerID=40&md5=d306a42f85e43565adf3bf92e7505608 https://scholars.lib.ntu.edu.tw/handle/123456789/616391 |
ISSN: | 08974756 | DOI: | 10.1021/cm050107r | SDG/關鍵字: | Electrochemical properties;Electronic conduction;Microwave-plasma-enhanced chemical vapor deposition;Nanoclusters;Chemical bonds;Composite materials;Cyclic voltammetry;Electrochemistry;Growth (materials);Methanol;Microwaves;Oxidation;Plasma enhanced chemical vapor deposition;Platinum;Sputtering;Transmission electron microscopy;X ray diffraction analysis;X ray photoelectron spectroscopy;Carbon nanotubes |
顯示於: | 凝態科學研究中心 |
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