核壳结构面心四方的 FePd/Pd 纳米颗粒可用作高效非 Pt 氧还原反应催化剂。
Core/Shell Face-Centered Tetragonal FePd/Pd Nanoparticles as an Efficient Non-Pt Catalyst for the Oxygen Reduction Reaction.
机构信息
Department of Chemistry, Brown University , Providence, Rhode Island 02912, United States.
Department of Environmental Engineering, Zhejiang University , Hangzhou, Zhejiang 310058, China.
出版信息
ACS Nano. 2015 Nov 24;9(11):11014-22. doi: 10.1021/acsnano.5b04361. Epub 2015 Oct 8.
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 ∼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 ORR.
我们通过还原退火法合成了核/壳面心四方 (fct)-FePd/Pd 纳米粒子 (NPs)，其前驱体是核/壳 Pd/Fe3O4 NPs，然后在醋酸中进行温度可控的 Fe 刻蚀。在所研究的三种不同类型的核/壳 FePd/Pd NPs（8nm 的 FePd 核和 0.27、0.65 或 0.81nm 的 Pd 壳）中，fct-FePd/Pd-0.65 NPs 是在 0.1 M HClO4 中用于氧还原反应 (ORR) 的最有效的催化剂，具有类似 Pt 的活性和耐久性。这种增强的 ORR 催化作用源于 fct-FePd 核诱导的所需的 0.65nm Pd 壳中的 Pd 晶格压缩。我们的研究为在酸性中增强 Pd 对 ORR 的催化作用提供了一种通用方法。
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