X射线吸收细结构光谱 (X-ray absorption fine structure, XAFS)是一种基于同步辐射光源的分析方法。 它测量的基本物理量为X射线质量吸收系数μ (E)。

In the Sn K-edge EXAFS spectra (Fig. 4a), metallic Sn 0 and Sn 2+/4+ were characterized by employing Sn and SnO 2 as references respectively, where the peaks located at 1.42 Å and 2.80 Å ...

Sn-modification of TiO2 photocatalysts has been recently proposed as a suitable strategy to improve pollutant degradation as well as hydrogen production. In particular, visible light activity...

2020年6月22日 · The structures of bimetallic PtM catalysts (M = Ga, Zn, In, Sn) have been studied by in situ X-ray diffraction and in situ X-ray absorption spectroscopy (XAS). High Sn content and high...

Here we probe the speciation of Sn in solutions of known composition and in commercial toothpaste using Sn K-edge X-ray absorption spectroscopy. We show that the oxidation state of Sn and its chemical nature depends on both paste composition and time of opening, with Sn ultimately oxidizing into amorphous Sn( IV ) hydroxide, Sn(OH) 4 .

2023年10月18日 · To further unravel the underlying dynamic catalytic mechanisms of Ir-Sn PSC, we combined operando XAS and x-ray emission spectroscopy (XES) techniques to examine the evolution of the electronic structure of Ir and Sn during the OER process.

2019年6月26日 · In situ X-ray absorption spectroscopy (XAS) was applied to investigate the Sn adlayer on platinized (pl-) Pt electrode in deaerated 0.2 M HClO 4 solution containing 10 −3 M Sn 2+ in relation to the effect of Sn addition on electrocatalysis of Pt.

2022年12月12日 · The transmission electron microscopy/scanning transmission electron microscopy images and fitting results of the small-angle X-ray scattering profile confirm the increased size of SnO 2 NPs due to the increase of SnO 2 loading. The catalytic performance of SnO 2 has proved the size-dependent effect during the CO 2 reduction reaction process.

Here we probe the speciation of Sn in solutions of known composition and in commercial toothpaste using Sn K-edge X-ray absorption spectroscopy. We show that the oxidation state of Sn and its chemical nature depends on both paste composition and time of opening, with Sn ultimately oxidizing into amorphous Sn(iv) hydroxide, Sn(OH)4.

Download scientific diagram | Sn 3d XPS spectra of samples synthesized under H2/N2, Ar or air. Peak deconvolution shown corresponding to Sn 0 (green), Sn IV (blue), and metallic Sn 3d3/2...