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Comparison of FePt and Pt Nanostructures for Oxygen Reduction Reaction in Basic Medium

机译:FePt和Pt纳米结构在碱性介质中氧还原反应的比较

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摘要

FePt nanoparticles (NPs) and colloidal nanoparticle clusters (CNCs) have been synthesized by the reduction of platinum acetylacetonate (Pt(acac)(2)) combined with thermal decomposition of iron pentacarbonyl (Fe(CO)(5)) and compared to pure Pt NPs and CNCs for the catalytic activity of the oxygen reduction (ORR). The formation of NPs and CNCs has been carried out controlling injection temperature of the precursors and the surfactants during the synthesis. The size of the NPs and the CNCs formed is around 3 and 38 nm, respectively. High electrocatalytic performance of the FePt CNCs in comparison with that of nanoparticles and nanocluster of platinum has been obtained for the reduction reaction (ORR) in basic medium. The ORR is carried out by a four-electron charge transfer. The increase in the activity of the CNC structures formed by FePt nanoparticles can be attributed to the alloy formation that produces surface and electronic changes of the Pt atoms and to the structure of the CNCs obtained.
机译:FePt纳米颗粒(NPs)和胶体纳米颗粒簇(CNCs)是通过还原乙酰丙酮铂(Pt(acac)(2))与五羰基铁(Fe(CO)(5))的热分解合成的,并与纯Pt NP和CNCs用于还原氧(ORR)的催化活性。 NP和CNC的形成已经在合成过程中控制前体和表面活性剂的注入温度来进行。形成的NP和CNC的尺寸分别为约3和38nm。 FePt CNCs在碱性介质中的还原反应(ORR)与铂的纳米颗粒和纳米簇相比具有较高的电催化性能。 ORR通过四电子电荷转移来进行。由FePt纳米颗粒形成的CNC结构活性的增加可以归因于产生Pt原子的表面和电子变化的合金形成以及所获得的CNC的结构。

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