Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-9666
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Main Title: Influence of Adding Molybdenum on Structure and Performance of FexOy/SBA‐15 Catalysts in Selective Oxidation of Propene
Author(s): Genz, Nina Sharmen
Ressler, Thorsten
Type: Article
Language Code: en
Abstract: 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 MoxOy_FexOy/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 Fe2(MoO4)3‐like species. Reducibility of MoxOy_FexOy/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 MoxOy_FexOy/SBA‐15 samples was studied in selective gas‐phase oxidation of propene with O2 as oxidant. Adding molybdenum resulted in an increased acrolein selectivity and a decreased selectivity towards total oxidation products.
URI: https://depositonce.tu-berlin.de/handle/11303/10771
http://dx.doi.org/10.14279/depositonce-9666
Issue Date: 21-Aug-2019
Date Available: 13-Feb-2020
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Subject(s): dispersion effect
electronic effect
green chemistry
heterogeneous catalysis
iron oxides
Sponsor/Funder: TU Berlin, Open-Access-Mittel - 2019
License: https://creativecommons.org/licenses/by-nc-nd/4.0/
Journal Title: ChemistryOpen
Publisher: Wiley
Publisher Place: Weinheim
Volume: 8
Issue: 8
Publisher DOI: 10.1002/open.201900219
Page Start: 1133
Page End: 1142
EISSN: 2191-1363
Appears in Collections:FG Analytische Chemie » Publications

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