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American Chemical Society, ACS Nano, 11(9), p. 11014-11022, 2015

DOI: 10.1021/acsnano.5b04361

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Core/Shell Face-Centered Tetragonal FePd/Pd Nanoparticles as an Efficient Non-Pt Catalyst for the Oxygen Reduction Reaction

Journal article published in 2015 by Guangming Jiang, Huiyuan Zhu, Xu Zhang, Bo Shen, Liheng Wu, Sen Zhang ORCID, Gang Lu, Zhongbiao Wu, Shouheng Sun
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report the synthesis of core/shell face-centered tetragonal (fct)-FePd/Pd nanoparticles (NPs) via reductive annealing of core/shell Pd/Fe3O4 NPs followed by temperature-controlled Fe etching in acetic acid. Among three different kinds of core/shell FePd/Pd NPs studied (FePd core at ~8 nm and Pd shell at 0.27, 0.65 or 0.8 nm), the fct-FePd/Pd-0.65 NPs are the most efficient catalyst for the oxygen reduction reaction (ORR) in 0.1 M HClO4 with Pt-like activity and durability. This enhanced ORR catalysis arises from the desired Pt lattice compression in the 0.65 nm Pd shell induced by the fct-FePd core. Our study offers a general approach to enhance Pd catalysis in acid for ORR.