Catalysis Research Center, Hokkaido University, Kita 21-10, Sapporo 001-0021, Japan.
J Synchrotron Radiat. 2012 Mar;19(Pt 2):205-9. doi: 10.1107/S0909049512001197. Epub 2012 Jan 27.
Structural changes in Ni(2)P/MCM-41 were followed by quick extended X-ray absorption fine structure (QEXAFS) and were directly related to changes in X-ray absorption near-edge structure (XANES) which had been used earlier for the study of the active catalyst phase. An equation is proposed to correct the transient QEXAFS spectra up to second-order in time to remove spectral distortions induced by structural changes occurring during measurements. A good correlation between the corrected QEXAFS and the XANES spectral changes was found, giving support to the conclusions derived from the XANES in the previous work, namely that the formation of a Ni-S bond in a surface NiPS phase is involved in the active site for the hydrodesulfurization reaction.
采用快速扩展 X 射线吸收精细结构（QEXAFS）跟踪研究了 Ni(2)P/MCM-41 的结构变化，这与之前用于研究活性催化剂相的 X 射线近边吸收结构（XANES）的变化直接相关。提出了一个方程来修正瞬态 QEXAFS 谱，直到二阶时间项，以消除在测量过程中发生的结构变化引起的光谱扭曲。校正后的 QEXAFS 与 XANES 光谱变化之间存在良好的相关性，这支持了之前的 XANES 研究得出的结论，即表面 NiPS 相中的 Ni-S 键的形成涉及加氢脱硫反应的活性位。
