Pt-Decorated Composition-Tunable Pd-Fe@Pd/C Core-Shell Nanoparticles with Enhanced Electrocatalytic Activity toward the Oxygen Reduction Reaction

Journal of the American Chemical Society
Yin XiongHéctor D Abruña

Abstract

Design of electrocatalysts with both a high-Pt-utilization efficiency and enhanced electrochemical activity is still the key challenge in the development of proton exchange membrane fuel cells. In the present work, Pd-Fe/C bimetallic nanoparticles (NPs) with an optimal Fe composition and decorated with Pt are introduced as promising catalysts toward the oxygen reduction reaction. These bimetallic nanoparticles have a Pd-Fe@Pd core-shell structure with a surface Pt decoration as established through the use of electron energy loss spectroscopy (EELS) and energy-dispersive X-ray (EDX) spectroscopy. These catalysts exhibit excellent electrocatalytic activity ( E1/2 = 0.866 V vs RHE), increasing the mass activity by more than 70% over that of Pt/C in terms of the total mass of Pt and Pd and by 14 times if only Pt is considered. Simple geometrical calculations, based on spherical core-shell models, indicate that Pd-Fe@Pt has a surface Pt decoration rather than a complete Pt monolayer. Such calculations applied to other examples in the literature point out the need for careful and rigorous arguments about claimed "Pt monolayer/multilayers". Such calculations must be based on not only elemental mapping data but also on the Pt/Pd and ot...Continue Reading

References

May 4, 2005·Nature Materials·Antonino Salvatore AricòWalter van Schalkwijk
Apr 4, 2009·Science·Hubert A Gasteiger, Nenad M Marković
Sep 17, 2009·Journal of the American Chemical Society·Lin-Lin Wang, Duane D Johnson
May 22, 2010·Nature Chemistry·Peter StrasserAnders Nilsson
Jun 23, 2010·Journal of the American Chemical Society·Minhua ShaoLesia Protsailo
Dec 2, 2011·Journal of the American Chemical Society·Mehtap OezaslanPeter Strasser
Feb 22, 2012·Angewandte Chemie·Dennis F van der VlietVojislav R Stamenkovic
Jun 19, 2013·Angewandte Chemie·Shaojun GuoShouheng Sun
Jun 18, 2014·Journal of the American Chemical Society·Gongwei WangLin Zhuang

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Citations

Sep 29, 2020·Nanoscale·Junming ZhangShigang Sun
Jan 24, 2019·Proceedings of the National Academy of Sciences of the United States of America·Yin XiongHéctor D Abruña
Nov 16, 2019·Proceedings of the National Academy of Sciences of the United States of America·Yao YangHéctor D Abruña
Feb 7, 2020·Journal of the American Chemical Society·Yao YangHéctor D Abruña
Jan 17, 2019·Journal of the American Chemical Society·Yao YangHéctor D Abruña
Oct 4, 2019·Chemical Reviews·Chenlu XiePeidong Yang
Feb 23, 2019·Journal of the American Chemical Society·Yin XiongHéctor D Abruña
Nov 20, 2019·Journal of the American Chemical Society·Yao YangHéctor D Abruña
Jun 28, 2019·Journal of the American Chemical Society·Yin XiongHéctor D Abruña
Sep 15, 2021·Journal of the American Chemical Society·Ming ZhouJiye Fang

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