Mn and Fe ions and oxo clusters in ZSM-5: pushing the limits of X-ray spectroscopy
X-ray spectroscopic techniques are important tools for the characterization of metal ions, clusters and nanoparticles in zeolites. A major limitation in X-ray absorption spectra is the intrinsic broadening due to core hole lifetime effects. Using high-energy resolution fluorescence detection (HERFD), this intrinsic broadening is removed, revealing new fine structure. In addition, we will show that the use of circular polarized X-rays can be a useful tool to determine the aggregation of metal ions. We present results obtained using these novel X-ray spectroscopic techniques, using Fe-ZSM-5 and Mn-ZSM-5 systems as showcases. The prospects for these techniques to become “standard tools for catalysis’s research will be discussed.
D. C. Radu P. Glatzel W. M. Heijboer J. H. Bitter B. M. Weckhuysen F. M. F.de Groot
Inorganic Chemistry and Catalysis, Department of Chemistry, Utrecht University,Sorbonnelaan 16, 3508 ESRF, 6 Rue Jules Horowitz, 38043 Grenoble, France
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）