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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Synthesis of nanodispersed oxides of vanadium, titanium, molybdenum, and tungsten on mesoporous silica using atomic layer deposition

Cited 29 times inthomson ciCited 31 times inthomson ci
Title
Synthesis of nanodispersed oxides of vanadium, titanium, molybdenum, and tungsten on mesoporous silica using atomic layer deposition
Other Titles
Synthesis of nanodispersed oxides of vanadium, titanium, molybdenum, and tungsten on mesoporous silica using atomic layer deposition
Author
Herrera, Jose E.Kwak, JahunHu, Jian ZhiWang, YongPeden, Charles H. F.
Keywords
atomic layer deposition; tungsten oxide; vanadium oxide; titanium oxide; molybdenum oxide; ethanol oxidation; 2-butanol dehydration; UV/Vis-DRS; H-1-NMR
Issue Date
2006-10
Publisher
SPRINGER/PLENUM PUBLISHERS
Citation
TOPICS IN CATALYSIS, v.39, no.3-4, pp.245 - 255
Abstract
The advantages of the atomic layer deposition (ALD) method for preparation of tungsten, vanadium, titanium, and molybdenum oxide catalyst supported on mesoporous silica are discussed, with emphasis on the importance of synthesis conditions on dispersion, structure and activity of the resulting materials. A suite of complementary techniques such as DRS-UV/Vis, BET, H-1-NMR, XRD, and TEM were used to study the structural properties of the supported metal oxides, and probe reactions such as 2-butanol dehydration and ethanol partial oxidation were used to demonstrate the potential advantages of the ALD-prepared catalysts. Specifically, highly dispersed oxides of titanium, molybdenum, and tungsten oxide on mesoporous silica were synthesized using the ALD method. It is also demonstrated that attainment of high dispersions of vanadium oxide on mesoporous silica requires the presence of at least a single layer of titanium oxide due to the well-known poor interaction between vanadia and silica. The highly dispersed catalysts prepared here by ALD methods exhibited superior catalytic performance relative to those prepared using conventional incipient wetness impregnation
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DOI
10.1007/s11244-006-0063-0
ISSN
1022-5528
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ECHE_Journal Papers
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