Journal
SCIENCE BULLETIN
Volume 61, Issue 16, Pages 1248-1254Publisher
SCIENCE PRESS
DOI: 10.1007/s11434-016-1125-8
Keywords
Palladium; Nanoparticle; Core/shell; Catalyst; Oxygen reduction reaction
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Funding
- Key Projects of Applied Technology Development in Chongqing [cstc2014yykfB90002]
- Science and Technology Project of Chongqing Municipal Education Commission [KJ1500601]
- Natural Science Foundation of Chongqing Science and Technology Commission [cstc2015jcyjA20007]
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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/mg(Pd), 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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