EXAFS studies of iron-substituted zeolite ZSM-5

✍ Scribed by Sean A. Axon; Katharine K. Fox; Stuart W. Carr; Jacek Klinowski

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 475 KB
• Volume: 189
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)85143-x

✦ Synopsis

Extended X-ray absorption fine structure confirms the substitution of Si by Fe in the framework of zeolite ZSM-5. Each framework Fe atom is coordinated to four oxygens with an Fe-O distance of I .83 A, and to four Si atoms in the second coordination shell: two at 3.2 8, and two at 3.38 A from Fe, compared with an average Si-Si distance in silicalite of 3.1 A. The distances between the framework Fe atom and some of the atoms in the template molecule are determined here for the first time.