Langmuir-Blodgett self-assembly and electrochemical catalytic property of FePt magnetic nano-monolayer

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• 作者：Ming Wen ; Kejia E ; Haiquan Qi ; Lujiang Li ; Juan Chen ; Ying Chen ; Qingsheng Wu and Tao Zhang
• 关键词：FePt nanoparticles ; Langmuir– ; Blodgett (LB) ; monolayer ; magnetic ; catalyst
• 刊名：Journal of Nanoparticle Research
• 出版年：2007
• 出版时间：October, 2007
• 年：2007
• 卷：9
• 期：5
• 页码：909-917
• 全文大小：490 KB

文摘

Dispersed-well FePt nanoparticles with particle size ~5 nm have been prepared by hydrazine hydrate reduction of H₂PtCl₆¡¤6H₂O and FeCl₂¡¤4H₂O in ethanol–water system. By employing as-synthesized FePt nanoparticles, the monolayer can be formed by LB Technique. The structural, magnetic properties and electrochemical properties of FePt monolayer were respectively studied by XRD, TEM, VSM and CHI 820 electrochemical workstation. The as-synthesized particle has a chemically disordered fcc structure and can be transformed into chemically ordered fct structure after annealing treatment above 400¡ãC. The coercivity of ordered fct FePt phase can be up to 2515Oe. CVs of 0.5 M H₂SO₄/0.5M CH₃OH on GCE modified with FePt nanoparticles monolayer films illustrate that the as-synthesized FePt is a kind of active electrochemical catalyst.