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

Zhengong Meng, Fei Xiao, Zhuoxun Wei, Xuyun Guo, Ye Zhu, Yurong Liu, Guijun Li, Zhen Qiang Yu, Minhua Shao, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

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. [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)2954-2959
Number of pages6
JournalNano Research
Volume12
Issue number12
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)
  • Electrical and Electronic Engineering

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