Enhanced electrocatalytic performance for methanol oxidation of Pt nanoparticles on Mn₃O₄-modified multi-walled carbon nanotubes

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• 作者：Xiulin Yang ; Xueyun Wang ; Guoqiang Zhang ; Junpeng Zheng ; Taishan Wang ; Xianzong Liu ; Chunying Shu ; Li Jiang ; Chunru Wang
• 关键词：Pt nanoparticles ; Mn3O4 ; Multi-walled carbon nanotubes ; Electrocatalysis ; Fuel cells
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 出版时间：August, 2012
• 年：2012
• 卷：37
• 期：15
• 页码：11167-11175
• 全文大小：1647 K

文摘

We report the preparation of well-dispersed Pt nanoparticles depositing on Mn₃O₄-modified multi-walled carbon nanotubes (Mn₃O₄-MWCNTs) that can be taken as high performance catalyst in methanol electro-oxidation. Various spectrometry techniques such as FT-IR, Raman, XRD, TEM and XPS measurements were performed, revealing that the Pt nanoparticles were highly dispersed on the surface of Mn₃O₄-modified MWCNTs with a narrow size distribution between 1.7?nm and 3.9?nm. Compared the Pt/MWCNT catalyst without Mn₃O₄ modification, the Pt/Mn₃O₄-MWCNT composite catalyst not only shows relative large electrochemical active surface area (EAS), high catalyzing activity toward methanol electro-oxidation, but also exhibits very high stability with apparent anti-poisoning tolerance to the incomplete oxidized species during methanol oxidation.