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Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene
Mixed iron and molybdenum oxide catalysts supported on nanostructured silica, SBA‐15, were synthesized with various Mo/Fe atomic ratios ranging from 0.07/1.0 to 0.57/1.0. Structural characterization of as‐prepared Mo(x)O(y)_Fe(x)O(y)/SBA‐15 samples was performed by nitrogen physisorption, X‐ray diff...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6709520/ https://www.ncbi.nlm.nih.gov/pubmed/31463173 http://dx.doi.org/10.1002/open.201900219 |
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author | Genz, Nina Sharmen Ressler, Thorsten |
author_facet | Genz, Nina Sharmen Ressler, Thorsten |
author_sort | Genz, Nina Sharmen |
collection | PubMed |
description | Mixed iron and molybdenum oxide catalysts supported on nanostructured silica, SBA‐15, were synthesized with various Mo/Fe atomic ratios ranging from 0.07/1.0 to 0.57/1.0. Structural characterization of as‐prepared Mo(x)O(y)_Fe(x)O(y)/SBA‐15 samples was performed by nitrogen physisorption, X‐ray diffraction, and DR‐UV‐Vis spectroscopy. Adding molybdenum resulted in a pronounced dispersion effect on supported iron oxidic species. Increasing atomic ratio up to 0.21Mo/1.0Fe was accompanied by decreasing species sizes. Strong interactions between iron and molybdenum during the synthesis resulted in the formation of Fe−O−Mo structure units, possibly Fe(2)(MoO(4))(3)‐like species. Reducibility of Mo(x)O(y)_Fe(x)O(y)/SBA‐15 catalysts was investigated by temperature‐programmed reduction experiments with hydrogen as reducing agent. The lower reducibility obtained when adding molybdenum was ascribed to both dispersion and electronic effect of molybdenum. Catalytic performance of Mo(x)O(y)_Fe(x)O(y)/SBA‐15 samples was studied in selective gas‐phase oxidation of propene with O(2) as oxidant. Adding molybdenum resulted in an increased acrolein selectivity and a decreased selectivity towards total oxidation products. |
format | Online Article Text |
id | pubmed-6709520 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-67095202019-08-28 Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene Genz, Nina Sharmen Ressler, Thorsten ChemistryOpen Full Papers Mixed iron and molybdenum oxide catalysts supported on nanostructured silica, SBA‐15, were synthesized with various Mo/Fe atomic ratios ranging from 0.07/1.0 to 0.57/1.0. Structural characterization of as‐prepared Mo(x)O(y)_Fe(x)O(y)/SBA‐15 samples was performed by nitrogen physisorption, X‐ray diffraction, and DR‐UV‐Vis spectroscopy. Adding molybdenum resulted in a pronounced dispersion effect on supported iron oxidic species. Increasing atomic ratio up to 0.21Mo/1.0Fe was accompanied by decreasing species sizes. Strong interactions between iron and molybdenum during the synthesis resulted in the formation of Fe−O−Mo structure units, possibly Fe(2)(MoO(4))(3)‐like species. Reducibility of Mo(x)O(y)_Fe(x)O(y)/SBA‐15 catalysts was investigated by temperature‐programmed reduction experiments with hydrogen as reducing agent. The lower reducibility obtained when adding molybdenum was ascribed to both dispersion and electronic effect of molybdenum. Catalytic performance of Mo(x)O(y)_Fe(x)O(y)/SBA‐15 samples was studied in selective gas‐phase oxidation of propene with O(2) as oxidant. Adding molybdenum resulted in an increased acrolein selectivity and a decreased selectivity towards total oxidation products. John Wiley and Sons Inc. 2019-08-21 /pmc/articles/PMC6709520/ /pubmed/31463173 http://dx.doi.org/10.1002/open.201900219 Text en ©2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Full Papers Genz, Nina Sharmen Ressler, Thorsten Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title | Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title_full | Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title_fullStr | Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title_full_unstemmed | Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title_short | Influence of Adding Molybdenum on Structure and Performance of Fe(x)O(y)/SBA‐15 Catalysts in Selective Oxidation of Propene |
title_sort | influence of adding molybdenum on structure and performance of fe(x)o(y)/sba‐15 catalysts in selective oxidation of propene |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6709520/ https://www.ncbi.nlm.nih.gov/pubmed/31463173 http://dx.doi.org/10.1002/open.201900219 |
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