2018年8月21日 · Curve fitting analysis of Pd K-edge extended X-ray absorption fine structure (EXAFS) spectra of SiO 2 -supported Pd complexes indicates that their Debye–Waller (DW) factors (σ2) increase with the increasing size of the co-immobilized organic molecules [21].

2019年1月16日 · The present study chooses a highly dispersed Fe−SiO 2 FTS catalyst as a research object and shows how X-ray absorption fine structure (XAFS) helps to analyze the chemical information (iron composition, reduction degree, and iron valence) and structural information (coordinating atom and coordination number) of catalyst.

2023年12月12日 · Previous operando X-ray absorption fine structure (XAFS) studies revealed that the In/SiO 2 catalyst undergoes dynamic structural changes during the activation process under flowing CH 4, such as melting, new bond formation, and regeneration of the metallic form.

我们已经使用X射线吸收精细结构（XAFS）光谱研究了高表面积无定形二氧化硅（am-SiO2）和γ-Al2O3上的Cu（II）吸附络合物。 对于γ-Al2O3上的Cu（II），对固-固总接触时间为80-170 h后收集的XAFS数据进行分析，结果表明，单体Cu（II）种类占优势，表面覆盖率为0.007和0.05 ...

2019年10月29日 · Extended X-ray absorption fine structure (EXAFS) is a powerful tool that can provide atomic level structure information about catalysts under reaction...

2011年3月31日 · Iron ion-promoted silica solid acid catalysts active for α-methylstyrene dimerization were characterized by XRD and Fe K-edge XANES/EXAFS spectroscopic techniques. The possible active species were...

2014年3月1日 · X-ray diffraction (XRD) and extended X-ray absorption fine structure (XAFS) spectroscopy were used to obtain structural properties for the supported Ni 2 P catalysts. Hydrodeoxygenation (HDO) tests were performed in a continuous flow fixed-bed reactor at 523–573 K, and 1 or 8 atm, and an LHSV of 2.0 h −1 .

All electrons emitted by a sample are measured by the sample current. Specific X-ray fluorescence is measured with a detector such as SDD or SSD. Spectrum of the target element is obtained by acquiring fluorescent X-rays of the coexisting element. All photons from a sample are measured with a detector such as MCP.

2001年3月1日 · The structural characterisation of SiO2/ZrO2 nano-sol particles, prepared by mixing SiO2 sol and aqueous solution of ZrOCl2 8H2O, has been carried out by in-situ XAS measurement at the Zr K-edge during condensation reaction.

2001年9月1日 · The samples of 5%TiO 2 /SiO 2 prepared by sol–gel method from inorganic precursors calcinated at the various temperatures were studied by XAFS spectroscopy at Siberian Synchrotron Radiation Center. It was established that structural lability of this system and the change of symmetry of the oxygen coordination around the Ti(+4) ions depends on ...