Europium-151 Mössbauer spectroscopic and XANES investigation of europium-exchanged Y-zeolite |
| |
| Authors: | Frank J Berry José F Marco Andrew T Steel |
| |
| Institution: | (1) School of Chemistry, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK;(2) Unilever Research, Port Sunlight Laboratory, L69 3JW Bebington, Merseyside, UK |
| |
| Abstract: | Eu3+ in ca. 10 wt% europium-exchanged Y-zeolite is partially reduced by treatment in hydrogen at 600°C to Eu2+. The reduction of Eu3+ is more readily achieved in Y-zeolite than in europium(III) oxide. The discrepancy in the extent of reduction as revealed by151Eu Mössbauer spectroscopy and near edge X-ray absorption fine structure (XANES) is associated with any difference in the recoil free fractions of Eu2+ and Eu3+ which may exist at 298 K and the enhanced sensitivity of the XANES to changes in the europium oxidation state. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
