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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Genesis of Pt Clusters in Reverse Micelles Investigated by in Situ X-ray Absorption Spectroscopy
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Genesis of Pt Clusters in Reverse Micelles Investigated by in Situ X-ray Absorption Spectroscopy

机译：原位X射线吸收光谱法研究反胶束中Pt簇的成因

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摘要

In situ X-ray absorption Spectroscopy (XAS) has been successfully applied to explore the formation mechanism of Pt clusters at the early stages within AOT reverse micelles.Transmission electron microscopy was also utilized to observe the size of the platinum clusters.Upon successive addition of the reducing agent,hydrazine (N_2H_4),six distinguishable steps were observed for the formation of Pt clusters at the early stage.Both in situ X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) analysis for the Pt Lin-edge confirms the Pt~(4+) -> Pt~(2+) -> Pt~0 reduction sequence.A corresponding structural model was proposed for each step so that this work provides a detailed insight into the mechanism of nucleation and growth of platinum clusters.
机译：原位X射线吸收光谱（XAS）已成功地用于探索AOT反胶束早期Pt团簇的形成机理，透射电子显微镜观察铂团簇的大小。还原剂肼（N_2H_4）在形成初期发现了六个明显的步骤。原位X射线吸收近边缘结构（XANES）和扩展X射线吸收精细结构（EXAFS）对Pt Lin-edge的分析确定了Pt〜（4+）-> Pt〜（2+）-> Pt〜0还原顺序。针对每个步骤都提出了相应的结构模型，以便此工作提供对铂簇的成核和生长机理。

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