Study of iron-zinc catalysts by Mössbauer spectroscopy |
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Authors: | S Humberto Arriola E Noel Nava G Aguilar H Armendariz |
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Institution: | (1) Sección de Ciencias Nucleares D. E. Pg., Facultad de Química, UNAM., 04510 México, D. F., México;(2) Division de catalasis IMP., Apartado Postal 14-805, México, D. F., México;(3) Geophysics division IMP., Apartado Postal 14-805, México, D. F., México |
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Abstract: | The Mössbauer parameters were determined on a series of catalyst mixtures of iron and zinc oxides with variable quantities of zinc. From these results, a change in the crystal structure of the iron oxide when introducing zinc into the samples was observed. The corundum structure of the -Fe2O3 phase was transformed into the spinel type of zinc ferrite when zinc oxide was present in any quantity. By means of these parameters a strong electronic interaction between the zinc ferrite and the zinc oxide present in excess was evident. The catalysts were analyzed using X-ray fluorescence /XRF/ and X-ray diffraction /XRD/. |
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