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Title: Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica

Abstract

The physical and chemical properties of tungsten oxide supported on SBA-15 mesoporous silica prepared by a controlled grafting process through atomic layer deposition (ALD) were studied using complementary characterization methods. X-ray diffraction, optical absorption and transmission electron microscopy showed that tungsten oxide species are highly dispersed on SBA-15 surfaces, even at 30 wt.% WOx contents (surface density: 1.33 WOx/nm2). ALD methods led to samples with much better thermal stability than those prepared via impregnation. Dehydration reactions of 2-butanol and methanol dehydration were used as probe reactions. Differences in reaction rates between the samples prepared by ALD and conventional impregnation reflect the sintering resistance of catalysts prepared by ALD. Notably, temperature programmed oxidation of spent catalysts showed that carbon formation was not responsible for the different dehydration rates in samples prepared by ALD and impregnation..

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
881683
Report Number(s):
PNNL-SA-46575
Journal ID: ISSN 0021-9517; JCTLA5; 13490; 10601; 10895; 9103; KC0302010; TRN: US200613%%70
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis, 239(1):200-211
Additional Journal Information:
Journal Volume: 239; Journal Issue: 1; Journal ID: ISSN 0021-9517
Country of Publication:
United States
Language:
English
Subject:
10 SYNTHETIC FUELS; ABSORPTION; CARBON; CATALYSTS; CHEMICAL PROPERTIES; DEHYDRATION; DEPOSITION; IMPREGNATION; METHANOL; OXIDATION; PROBES; REACTION KINETICS; SILICA; SINTERING; STABILITY; SYNTHESIS; TRANSMISSION ELECTRON MICROSCOPY; TUNGSTEN OXIDES; X-RAY DIFFRACTION; Atomic layer deposition; tungsten oxide; methanol dehydration; 2-butanol dehydration; UV-Vis DRS; 1H-NMR; Environmental Molecular Sciences Laboratory

Citation Formats

Herrera, Jose E, Kwak, Ja Hun, Hu, Jian Zhi, Wang, Yong, Peden, Charles HF, Macht, Josef, and Iglesia, Enrique. Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica. United States: N. p., 2006. Web. doi:10.1016/j.jcat.2006.01.034.
Herrera, Jose E, Kwak, Ja Hun, Hu, Jian Zhi, Wang, Yong, Peden, Charles HF, Macht, Josef, & Iglesia, Enrique. Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica. United States. https://doi.org/10.1016/j.jcat.2006.01.034
Herrera, Jose E, Kwak, Ja Hun, Hu, Jian Zhi, Wang, Yong, Peden, Charles HF, Macht, Josef, and Iglesia, Enrique. 2006. "Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica". United States. https://doi.org/10.1016/j.jcat.2006.01.034.
@article{osti_881683,
title = {Synthesis, Characterization, and Catalytic Function of Novel Highly Dispersed Tungsten Oxide Catalysts on Mesoporous Silica},
author = {Herrera, Jose E and Kwak, Ja Hun and Hu, Jian Zhi and Wang, Yong and Peden, Charles HF and Macht, Josef and Iglesia, Enrique},
abstractNote = {The physical and chemical properties of tungsten oxide supported on SBA-15 mesoporous silica prepared by a controlled grafting process through atomic layer deposition (ALD) were studied using complementary characterization methods. X-ray diffraction, optical absorption and transmission electron microscopy showed that tungsten oxide species are highly dispersed on SBA-15 surfaces, even at 30 wt.% WOx contents (surface density: 1.33 WOx/nm2). ALD methods led to samples with much better thermal stability than those prepared via impregnation. Dehydration reactions of 2-butanol and methanol dehydration were used as probe reactions. Differences in reaction rates between the samples prepared by ALD and conventional impregnation reflect the sintering resistance of catalysts prepared by ALD. Notably, temperature programmed oxidation of spent catalysts showed that carbon formation was not responsible for the different dehydration rates in samples prepared by ALD and impregnation..},
doi = {10.1016/j.jcat.2006.01.034},
url = {https://www.osti.gov/biblio/881683}, journal = {Journal of Catalysis, 239(1):200-211},
issn = {0021-9517},
number = 1,
volume = 239,
place = {United States},
year = {Sat Apr 01 00:00:00 EST 2006},
month = {Sat Apr 01 00:00:00 EST 2006}
}