Highly Active Platinum Nanoparticles on Graphene Nanosheets with a Significant Improvement in Stability and CO Tolerance

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• 作者：Daping He ; Kun Cheng ; Huaiguang Li ; Tao Peng ; Feng Xu ; Shichun Mu ; Mu Pan
• 刊名：Langmuir
• 出版年：2012
• 出版时间：February 28, 2012
• 年：2012
• 卷：28
• 期：8
• 页码：3979-3986
• 全文大小：729K
• 年卷期：v.28,no.8(February 28, 2012)
• ISSN：1520-5827

文摘

Graphene nanosheets (GNS) supporting Pt nanoparticles (PNs) are prepared using perfluorosulfonic acid (PFSA) as a functionalization and anchoring agent. Transmission electron microscope (TEM) results indicate that the prepared Pt NPs are uniformly deposited on GNS with a narrow particle size ranging from 1 to 4 nm in diameter. A high catalytic activity of this novel catalyst is observed by both cyclic voltammetry and oxygen reduction reaction (ORR) measurements due to the increasing of proton (H⁺) transmission channels. Significantly, this novel PFSA-functionalized Pt/GNS (PFSA-Pt/GNS) catalyst reveals a better CO oxidation and lower loss rate of electrochemical active area in comparison with that of the plain Pt/GNS and conventional Pt/C catalysts, indicating our PFSA-Pt/GNS catalysts hold much higher stability and CO tolerance by virtue of introduction of PFSA.