Core/Shell Pd/FePt Nanoparticles as an Active and Durable Catalyst for the Oxygen Reduction Reaction
Core/Shell Pd/FePt Nanoparticles as an Active and Durable Catalyst for the Oxygen Reduction Reaction
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DOI：
10.1021/ja1024436
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发表时间：
2010-06-16
影响因子：
15
通讯作者：
Sun, Shouheng
中科院分区：
文献类型：
--
作者：
Mazumder, Vismadeb;Chi, Miaofang;Sun, Shouheng
我们报道了一种独特的核/壳结构Pd/FePT纳米粒子(NPs)的合成及其对氧还原反应的催化作用。在铂盐和Pd纳米粒子存在下，Fe(CO)(5)在指定的反应温度下受控成核，形成了均匀的FePT壳层。Pd/FePT纳米粒子表现出依赖于FePT壳的催化性能，具有1 nm FePT外壳的纳米粒子的耐久性和活性显著提高(与具有3 nm涂层的纳米粒子相比，活性提高了15倍，起始电位增加了140 mV)。这些Pd/FePt纳米粒子是一种具有实际应用前景的新型燃料电池催化剂。
We report a unique synthesis of core/shell Pd/FePt nanoparticles (NPs) and their catalysis of the oxygen reduction reaction (ORR). The uniform FePt shell is formed by controlled nucleation of Fe(CO)(5) in the presence of a Pt salt and Pd NPs at designated reaction temperatures. The Pd/FePt NPs show FePt shell-dependent catalytic properties, and those having a 1 nm FePt shell exhibit a drastic increase in durability and activity (15 times more active with a 140 mV gain in onset potential in comparison with those having a 3 nm coating). These Pd/FePt NPs are promising new catalysts for practical fuel cell applications.