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

L1 0 -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....

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Bibliographic Details
Published in:Nano research 2019-12, Vol.12 (12), p.2954-2959
Main Authors: Meng, Zhengong, Xiao, Fei, Wei, Zhuoxun, Guo, Xuyun, Zhu, Ye, Liu, Yurong, Li, Guijun, Yu, Zhen-Qiang, Shao, Minhua, Wong, Wai-Yeung
Format: Article
Language:English
Subjects:
Atomic/Molecular Structure and Spectra
Bimetals
Biomedicine
Biotechnology
Chemical reduction
Chemistry and Materials Science
Coercivity
Condensed Matter Physics
Diffraction patterns
Electrocatalysts
Electrolytic cells
Ferromagnetism
Fuel cells
Fuel technology
Hydrogen evolution reactions
Intermetallic compounds
Iron compounds
Materials Science
Nanoparticles
Nanotechnology
Organic chemistry
Oxygen
Oxygen reduction reactions
Platinum
Platinum compounds
Pyrolysis
Research Article
Room temperature
Sulfuric acid
X-ray diffraction
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Summary:L1 0 -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 L1 0 -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 O 2 -saturated 0.1 M HClO 4 solution and hydrogen evolution reaction (HER) in the 0.5 M H 2 SO 4 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.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-019-2537-y