Research Article

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2019, 12(12): 2954–2959

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https://doi.org/10.1007/s12274-019-2537-y

Direct synthesis of L10-FePt nanoparticles from single-source bimetallic complex and their electrocatalytic applications in oxygen reduction and hydrogen evolution reactions

Zhengong Meng1,§, Fei Xiao2,§, Zhuoxun Wei1, Xuyun Guo4, Ye Zhu4, Yurong Liu1, Guijun Li5, Zhen-Qiang Yu1 (*), Minhua Shao2 (*), and Wai-Yeung Wong3,6 (*)

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1 College of Chemistry and Environmental Engineering and Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen 518060, China
2 Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong, China
3 Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
4 Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
5 State Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
6 The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China
§ Zhengong Meng and Fei Xiao contributed equally to this work.

Keywords: bimetallic complex, single-source precursor, FePt nanoparticle, oxygen reduction reaction, hydrogen evolution reaction
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  • Abstract
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L10-FePt nanoparticles (NPs) with high chemical ordering represent effective electrocatalysts to reduce the cost and enhance their catalytic performance in fuel cells. A molecular strategy of preparing highly ordered FePt NPs was used by direct pyrolysis of a Fe,Pt-containing bimetallic complex. The resultant L10-FePt NPs had very high crystallinity as reflected by the obvious diffraction patterns, clear lattice fringes and characteristic X-ray diffraction peaks, etc. Besides, the strong ferromagnetism with room temperature coercivity of 27 kOe further confirmed the face-centered tetragonal (fct) phase in good agreement with the ordered nanostructures. The FePt NPs can be used as electrocatalysts to catalyze oxygen reduction reaction (ORR) in an O2-saturated 0.1 M HClO4 solution and hydrogen evolution reaction (HER) in the 0.5 M H2SO4 electrolyte with much better performance than commercial Pt/C, and showed quite high stability after 10,000 cycles. The strategy utilizing organometallic precursors to prepare metal alloy NPs was demonstrated to be a reliable approach for improving the catalytic efficiency in fuel cells.
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Direct synthesis of L10-FePt nanoparticles from single-source bimetallic complex and their electrocatalytic applications in oxygen reduction and hydrogen evolution reactions. Nano Res. 2019, 12(12): 2954–2959 https://doi.org/10.1007/s12274-019-2537-y

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