NbC Nanowire-Supported Pt Nanoparticles as a High Performance Catalyst for Methanol Electrooxidation

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• 作者：Zhen Qiu ; Hui Huang ; Jun Du ; Tong Feng ; Wenkui Zhang ; Yongping Gan ; Xinyong Tao
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：July 11, 2013
• 年：2013
• 卷：117
• 期：27
• 页码：13770-13775
• 全文大小：335K
• 年卷期：v.117,no.27(July 11, 2013)
• ISSN：1932-7455

文摘

NbC nanowires (NWs) have been successfully synthesized by a bamboo-based carbon-thermal method and used as potential platinum catalyst support for direct methanol fuel cells (DMFCs). The NbC NWs show a highly oriented growth behavior, high electrical conductivity, and outstanding oxidation resistance. Well-deposited platinum (Pt) nanoparticles with the average size of about 6 nm were highly dispersed on the surface of the NbC NWs via sodium borohydride reduction method. Compared with conventional Pt/C (Vulcan XC-72) catalyst, the Pt/NbC NWs catalyst presented a distinctly enhanced methanol oxidation reaction (MOR) by a negative shift in the onset potential and an increase of the peak current density. Meanwhile, the Pt/NbC NW catalyst showed excellent electrochemical stability, which could be attributed to little change of electrochemical surface area during methanol oxidation. On the basis of these intrinsic properties and one-dimensional nanoarchitecture, the NbC NWs will be attractive as a promising catalyst support in DMFCs.