Core/shell FePd/Pd catalyst with a superior activity to Pt in oxygen reduction reaction
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- 作者：Guangming Jiang ; Xinwei Li ; Xiaoshu Lv ; Ling Chen
- 刊名：Chinese Science Bulletin
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：61
- 期：16
- 页码：1248-1254
- 全文大小：1,900 KB
- 刊物主题：Science, general; Life Sciences, general; Physics, general; Chemistry/Food Science, general; Earth Sciences, general; Engineering, general;
- 出版者：Springer Berlin Heidelberg
- ISSN：1861-9541
- 卷排序：61
文摘
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.KeywordsPalladiumNanoparticleCore/shellCatalystOxygen reduction reaction