X-ray photoelectron spectroscopy: Silver salts revisited
X-ray photoelectron spectroscopy: Silver salts revisited
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DOI：
10.1016/j.vacuum.2012.05.031
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发表时间：
2012-07-20
期刊：
影响因子：
4
通讯作者：
Botelho do Rego, Ana Maria
中科院分区：
文献类型：
--
作者：
Ferraria, Ana Maria;Carapeto, Ana Patricia;Botelho do Rego, Ana Maria
用XPS测定银的氧化态是一个有很大争议的问题。事实上，在文献中，其最强峰Ag 3d的结合能值存在较大差异。俄歇参数对区分Ag(0)和其他氧化态有用，但对识别其他氧化态无用。在这项工作中，使用Ag仅以Ag(I)形式存在的盐，氧化物Ag2O和AgO以及它们的机械混合物，我们可以证明Ag(I)和Ag（III）通过它们的峰形状和宽度比它们的绝对结合能更容易识别。XPS峰拟合首次与Ago中Ag(I)和Ag（III）的存在相匹配，其化学计量比为1:1 (v/v)，与其他性质（即抗磁性）预测的结果一致。(C) 2012 Elsevier Ltd.版权所有。
The assignment of silver oxidation state by XPS is a matter of large controversy. In fact, a large discrepancy of binding energy values for its most intense peak, Ag 3d, exists in the literature. Auger parameter is useful to distinguish Ag(0) from other oxidation states but useless for identifying other oxidation states. In this work, using salts where Ag exists solely in the form of Ag (I), the oxides Ag2O and AgO and a mechanical mixture of them, we could demonstrate that Ag(I) and Ag(III) are identifiable much more by their peak shape and width than by their absolute binding energy. For the first time, the XPS peak fit was performed in a way compatible with the presence of Ag(I) and Ag(III) in Ago with 1:1 (v/v) stoichiometry as predicted by other properties, namely its diamagnetism. (C) 2012 Elsevier Ltd. All rights reserved.