Synthesis and Characterization of Nanocomposites with Strong Interfacial Interaction: Sulfated ZrO2 Nanoparticles Supported on Multiwalled Carbon Nanotubes

详细信息    查看全文

• 作者：Changchang Liu ; Sungchul Lee ; Dong Su ; Zhiteng Zhang ; Lisa Pfefferle ; Gary L. Haller
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：October 18, 2012
• 年：2012
• 卷：116
• 期：41
• 页码：21742-21752
• 全文大小：714K
• 年卷期：v.116,no.41(October 18, 2012)
• ISSN：1932-7455

文摘

We discuss the synthesis of a composite of ZrO₂ nanoparticles supported on multiwalled carbon nanotubes (MWCNT). Using X-ray diffraction and high-resolution transmission electron microscopy (HR-TEM), the ZrO₂ were found to be 2鈥? nm tetragonal crystalline nanoparticles. Strong interfacial interaction between the ZrO₂ nanoparticles and the MWCNT surface was observed by near-edge X-ray absorption fine structure spectroscopy (NEXAFS) at the carbon K-edge and the oxygen K-edge, and this strong metal oxide/support interaction leads to small ZrO₂ particle size and thermal stability. The ZrO₂/MWCNT was converted into a solid acid catalyst by sulfation, and the properties of S-ZrO₂/MWCNT were studied. The nature of the acid sites was probed by S K-edge and Zr L-edges (L₃, L₂, L₁) XANES as well as catalytic probe reaction of cyclohexane dehydrogenation/cracking. Such composites would be good candidates for potential catalysis applications in fuel cell electrodes and biomass processing.