Polyaniline-Functionalized Carbon Nanotube Supported Platinum Catalysts

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• 作者：Daping He ; Chao Zeng ; Cheng Xu ; Niancai Cheng ; Huaiguang Li ; Shichun Mu ; Mu Pan
• 刊名：Langmuir
• 出版年：2011
• 出版时间：May 3, 2011
• 年：2011
• 卷：27
• 期：9
• 页码：5582-5588
• 全文大小：1059K
• 年卷期：v.27,no.9(May 3, 2011)
• ISSN：1520-5827

文摘

Electrocatalytically active platinum (Pt) nanoparticles on a carbon nanotube (CNT) with enhanced nucleation and stability have been demonstrated through introduction of electron-conducting polyaniline (PANI) to bridge the Pt nanoparticles and CNT walls with the presence of platinum鈭抧itride (Pt鈭扤) bonding and 蟺鈭捪€ bonding. The Pt colloids were prepared through ethanol reduction under the protection of aniline, the CNT was dispersed well with the existence of aniline in the solution, and aniline was polymerized in the presence of a protonic acid (HCl) and an oxidant (NH₄S₂O₈). The synthesized PANI is found to wrap around the CNT as a result of 蟺鈭捪€ bonding, and highly dispersed Pt nanoparticles are loaded onto the CNT with narrowly distributed particle sizes ranging from 2.0 to 4.0 nm due to the polymer stabilization and existence of Pt鈭扤 bonding. The Pt鈭扨ANI/CNT catalysts are electroactive and exhibit excellent electrochemical stability and therefore promise potential applications in proton exchange membrane fuel cells.