Pirngruber Gerhard D, Roy Pijus K, Prins R
Institute of Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland.
Phys Chem Chem Phys. 2006 Sep 14;8(34):3939-50. doi: 10.1039/b606205a. Epub 2006 Jul 24.
In order to interpret catalytic data on iron zeolites in terms of structure-activity relationships, reliable characterisation methods are needed. In particular, the nuclearity of the iron species is an important issue, since it is often invoked to explain catalytic activity. In the present contribution, we address the problem of the nuclearity of the iron species in Fe-ZSM-5 by a combination of techniques, that is, UV-Vis, EXAFS, Magnetic Circular Dichroism (MCD) and magnetisation measurements. Based on an in-depth analysis of these data, we show that some of the current interpretations of UV-Vis and EXAFS spectra need to be revised.
为了根据结构-活性关系来解释铁沸石的催化数据，需要可靠的表征方法。特别是，铁物种的核数是一个重要问题，因为它常被用来解释催化活性。在本论文中，我们通过结合紫外可见光谱（UV-Vis）、扩展X射线吸收精细结构（EXAFS）、磁圆二色性（MCD）和磁化测量等技术，解决了Fe-ZSM-5中铁物种的核数问题。基于对这些数据的深入分析，我们表明目前对UV-Vis和EXAFS光谱的一些解释需要修正。
