Abstract
Developing high-efficient non-platinum (Pt) catalysts for oxygen reduction reaction (ORR) is the key to reduce the usage of Pt and the palladium (Pd)-based catalyst is a promising alternative. Here, we presented a facile approach to core/shell FePd/Pd nanoparticle (NP) catalyst with the FePd core in chemically ordered face-centered tetragonal (fct-) structure and the shell in controlled thickness from 0.32 to 0.81 nm via the thermal annealing of FePd NP followed by an electro-anodization process. With a 0.71 nm-thick Pd shell, the fct-FePd/Pd shows a robust catalytic activity and durability for ORR with the mass activities at 0.85 and 0.90 V reaching 453 and 96.7 A/mgPd, respectively, which are about 3.0 and 2.1 times higher than those of commercial Pt in alkaline media. This work presents a new class of non-Pt catalyst with superior performance to Pt for ORR catalysis, and the strategy demonstrated here can be extended to design high-efficient catalysts for other chemical reactions.
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Acknowledgments
This work was supported by the Key Projects of Applied Technology Development in Chongqing (cstc2014yykfB90002), the Science and Technology Project of Chongqing Municipal Education Commission (KJ1500601) and the Natural Science Foundation of Chongqing Science and Technology Commission (cstc2015jcyjA20007).
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Jiang, G., Li, X., Lv, X. et al. Core/shell FePd/Pd catalyst with a superior activity to Pt in oxygen reduction reaction. Sci. Bull. 61, 1248–1254 (2016). https://doi.org/10.1007/s11434-016-1125-8
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DOI: https://doi.org/10.1007/s11434-016-1125-8