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Europium-151 Mössbauer spectroscopic and XANES investigation of europium-exchanged Y-zeolite

  • Catalysis And Corrosion
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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.

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Berry, F.J., Marco, J.F. & Steel, A.T. Europium-151 Mössbauer spectroscopic and XANES investigation of europium-exchanged Y-zeolite. Hyperfine Interact 83, 347–350 (1994). https://doi.org/10.1007/BF02074297

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