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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Sum Frequency Generation Vibrational Spectroscopy of Pyridine Hydrogenation on Platinum Nanoparticles
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Sum Frequency Generation Vibrational Spectroscopy of Pyridine Hydrogenation on Platinum Nanoparticles

机译:铂纳米粒子上吡啶加氢的总和频率产生振动光谱

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Pyridine hydrogenation in the presence of a surface monolayer consisting of cubic Pt nanoparticles stabilized by tetradecyltrimethylammonium bromide (TTAB) was investigated by sum frequency generation (SFG) vibrational spectroscopy using total internal reflection (TIR) geometry. TIR-SFG spectra analysis revealed that a pyridinium cation (C5H5NH~+) forms during pyridine hydrogenation on the Pt nanoparticle surface, and the NH group in the C5H5NH~+ cation becomes more hydrogen bound with the increase of the temperature. In addition, the surface coverage of the cation decreases with the increase of the temperature. An important contribution of this study is the in situ identification of reaction intermediates adsorbed on the Pt nanoparticle monolayer during pyridine hydrogenation.
机译:通过使用全内反射(TIR)几何结构的总频率生成(SFG)振动光谱研究了在存在由立方烷基Pt纳米颗粒组成的表面单层存在下进行的吡啶加氢反应,该立方纳米Pt纳米颗粒由溴化十四烷基三甲基铵(TTAB)稳定。 TIR-SFG光谱分析表明,在吡啶加氢过程中,Pt纳米颗粒表面形成吡啶鎓阳离子(C5H5NH〜+),随着温度的升高,C5H5NH〜+阳离子中的NH基团与氢原子结合的程度更高。另外,阳离子的表面覆盖率随温度的升高而降低。这项研究的重要贡献是在吡啶氢化过程中原位鉴定吸附在Pt纳米颗粒单层上的反应中间体。

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