期刊
ACS NANO
卷 9, 期 11, 页码 11014-11022出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b04361
关键词
FePd; face-centered tetragonal structure; core/shell nanoparticles; electrocatalysis; oxygen reduction reaction
类别
资金
- U.S. Army Research Laboratory
- U.S. Army Research Office under the Multi University Research Initiative (MURI) [W911NF-11-1-0353]
- National Natural Science Foundation of China [51508055]
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 similar to 8 nm and Pd shell at 0.27, 0.65, or 0.81 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 Pd 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 ORB.
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