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Title: Energies of Electronic States of Ni (II) Ion in NiO-Al2O3 Catalyst Prepared by Impregnation

Abstract

The behavior of NiO-Al2O3 catalysts is strongly dependent on the preparation method, as well as on pretreatment conditions. In the present work we investigated the influences of Ni(II) ion on NiO-Al2O3 catalysts properties due to the preparation by impregnation method. Based on experimental diffuse reflectance spectroscopy (DRS) data of electronic d-d transitions of Ni (II) promoter ion the energies of electronic states in spinel-like structure were calculated, and the most probable scheme of molecular orbital have been proposed.

Authors:
 [1];  [2];  [3]
  1. University of Novi Sad, Faculty of Sciences, Department of Physics, Trg D. Obradovica 4, 21000 Novi Sad (Serbia)
  2. University of Novi Sad, Faculty of Technical Sciences, Trg D. Obradovica 6, 21000 Novi Sad (Serbia)
  3. University of Novi Sad, Faculty of Technology, Bul. Cara Lazara 1, 21000 Novi Sad (Serbia)
Publication Date:
OSTI Identifier:
21057228
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 899; Journal Issue: 1; Conference: 6. international conference of the Balkan Physical Union, Istanbul (Turkey), 22-26 Aug 2006; Other Information: DOI: 10.1063/1.2733375; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; ALUMINIUM OXIDES; CATALYSTS; DENSITY; ENERGY-LEVEL TRANSITIONS; IMPREGNATION; MOLECULAR ORBITAL METHOD; NICKEL IONS; NICKEL OXIDES; SPECTRAL REFLECTANCE; SPINELS

Citation Formats

Obadovic, D. Z., Kiurski, J., and Marinkovic-Neducin, R. P. Energies of Electronic States of Ni (II) Ion in NiO-Al2O3 Catalyst Prepared by Impregnation. United States: N. p., 2007. Web. doi:10.1063/1.2733375.
Obadovic, D. Z., Kiurski, J., & Marinkovic-Neducin, R. P. Energies of Electronic States of Ni (II) Ion in NiO-Al2O3 Catalyst Prepared by Impregnation. United States. doi:10.1063/1.2733375.
Obadovic, D. Z., Kiurski, J., and Marinkovic-Neducin, R. P. Mon . "Energies of Electronic States of Ni (II) Ion in NiO-Al2O3 Catalyst Prepared by Impregnation". United States. doi:10.1063/1.2733375.
@article{osti_21057228,
title = {Energies of Electronic States of Ni (II) Ion in NiO-Al2O3 Catalyst Prepared by Impregnation},
author = {Obadovic, D. Z. and Kiurski, J. and Marinkovic-Neducin, R. P.},
abstractNote = {The behavior of NiO-Al2O3 catalysts is strongly dependent on the preparation method, as well as on pretreatment conditions. In the present work we investigated the influences of Ni(II) ion on NiO-Al2O3 catalysts properties due to the preparation by impregnation method. Based on experimental diffuse reflectance spectroscopy (DRS) data of electronic d-d transitions of Ni (II) promoter ion the energies of electronic states in spinel-like structure were calculated, and the most probable scheme of molecular orbital have been proposed.},
doi = {10.1063/1.2733375},
journal = {AIP Conference Proceedings},
number = 1,
volume = 899,
place = {United States},
year = {Mon Apr 23 00:00:00 EDT 2007},
month = {Mon Apr 23 00:00:00 EDT 2007}
}
  • X-ray diffraction, Raman and diffuse-reflectance (DR) spectroscopy, coupled with selective extraction of Mo and Ni, are applied to investigate the phase composition of Al-Ni-Mo catalysts prepared both by a conventional one-step impregnation with ammonia and phosphoric acid, and by a new method based on the use of nickel heteropolymolybdate. By comparing the data obtained by Raman and DR spectroscopy with the data on water extraction, it is shown that the phase removed on washing can be ascribed to heteropolymolybdates. Formation of these compounds is found to be favored by the use of the solution containing H{sub 3}PO{sub 4} to impregnatemore » the catalyst with Mo and Ni.« less
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