Elettra BACH光束线上液体和固液界面处的软X射线光谱
Soft X-ray spectroscopies in liquids and at solid-liquid interface at BACH beamline at Elettra
摘要:
在意大利的里雅斯特Elettra同步加速器运行的Istituto Catenina dei Materiali-Consiglio Nazionale delle Ricerche(IOM-CNR)的高级双色光束线(BACH)在极紫外(EUV)-软X射线光子能量范围内工作,具有可选择的光偏振、高能量分辨率、亮度和时间分辨率。光束线为材料的电子、化学、结构、磁性和动力学性质的研究提供了一种多技术方法。最近的三个终端站之一已致力于实验的基础上在固/液界面和光催化或电化学反应过程中的电子转移过程。开发了在环境压力下在液体和试剂气体存在下进行软X射线光谱的合适的池。在这里,我们提出了两种类型的静态电池工作在传输或荧光产率,和电化学流动电池,允许进行循环伏安法原位,电沉积在工作电极(WE)和研究化学反应在operando条件。X射线吸收光谱(XAS)的测量在环境条件下进行,并在液体中的电化学实验的例子。
英文摘要:
The Beamline for Advanced diCHroism (BACH) of the Istituto Officina dei Materiali-Consiglio Nazionale delle Ricerche (IOM-CNR), operating at Elettra synchrotron in Trieste (Italy), works in the extreme ultra violet (EUV)-soft X-ray photon energy range with selectable light polarization, high energy resolution, brilliance and time resolution. The beamline offers a multi-technique approach for the investigation of the electronic, chemical, structural, magnetic, and dynamical properties of materials. Recently one of the three end-stations has been dedicated to experiments based on electron transfer processes at the solid/liquid interfaces and during photocatalytic or electrochemical reactions. Suitable cells to perform soft X-ray spectroscopy in the presence of liquids and reagent gases at ambient pressure were developed. Here we present two types of static cells working in transmission or in fluorescence yield, and an electrochemical flow cell which allows to carry out cyclic voltammetry in situ, electrodeposition on a working electrode (WE) and to study chemical reactions in-operando conditions. Examples of X-ray absorption spectroscopy (XAS) measurements performed in ambient conditions and during electrochemical experiments in liquid are presented.
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