| Title: | Direct synthesis of L10-FePt nanoparticles from single-source bimetallic complex and their electrocatalytic applications in oxygen reduction and hydrogen evolution reactions | Authors: | Meng, Z Xiao, F Wei, Z Guo, X Zhu, Y Liu, Y Li, G Yu, ZQ Shao, M Wong, WY |
Issue Date: | Dec-2019 | Source: | Nano research, Dec. 2019, v. 12, no. 12, p. 2954-2959 | 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.]. | Keywords: | Bimetallic complex FePt nanoparticle Hydrogen evolution reaction Oxygen reduction reaction Single-source precursor |
Publisher: | Tsinghua University Press | Journal: | Nano research | ISSN: | 1998-0124 | EISSN: | 1998-0000 | DOI: | 10.1007/s12274-019-2537-y |
| Appears in Collections: | Journal/Magazine Article |
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