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Nano Research

Article Title

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

Authors

Zhengong Meng, College of Chemistry and Environmental Engineering and Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen 518060, China
Fei Xiao, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong, China
Zhuoxun Wei, College of Chemistry and Environmental Engineering and Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen 518060, China
Xuyun Guo, Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
Ye Zhu, Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
Yurong Liu, College of Chemistry and Environmental Engineering and Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen 518060, China
Guijun Li, State Key Laboratory of Ultra-precision Machining Technology, Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
Zhen-Qiang Yu, College of Chemistry and Environmental Engineering and Institute of Low-dimensional Materials Genome Initiative, Shenzhen University, Shenzhen 518060, China
Minhua Shao, Department of Chemical and Biological Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon 999077, Hong Kong, China
Wai-Yeung Wong, Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China

Keywords

bimetallic complex, single-source precursor, FePt nanoparticle, oxygen reduction reaction, hydrogen evolution reaction

Abstract

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.

Graphical Abstract

Publisher

Tsinghua University Press

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