Low-temperature oxidation of SiGe by liquid-phase deposition

2008 ◽  
Vol 254 (19) ◽  
pp. 6034-6036 ◽  
Author(s):  
Y.H. Chen ◽  
C.Y. Kung ◽  
J.D. Hwang ◽  
H.Y. Lin ◽  
H.J. Chan ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Liquid Phase Deposition ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation

Low temperature oxidation of ammonia to nitrogen in liquid phase

1999 ◽  
Vol 23 (1) ◽  
pp. 45-57 ◽  
Author(s):  
R. Ukropec ◽  
B.F.M. Kuster ◽  
J.C. Schouten ◽  
R.A. van Santen
Keyword(s):  
Liquid Phase ◽  
Low Temperature ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Ammonia

scholarly journals Influence of Co-Precipitation Agent on the Structure, Texture and Catalytic Activity of Au-CeO2 Catalysts in Low-Temperature Oxidation of Benzyl Alcohol

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 641
Author(s):  
Lukasz Wolski ◽  
Grzegorz Nowaczyk ◽  
Stefan Jurga ◽  
Maria Ziolek
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Benzyl Alcohol ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Oxidation Of Benzyl Alcohol ◽  
Key Factor ◽  
Au Particle Size ◽  
Co Precipitation

The aim of the study was to establish the influence of a co-precipitation agent (i.e., NaOH–immediate precipitation; hexamethylenetetramine/urea–gradual precipitation and growth of nanostructures) on the properties and catalytic activity of as-synthesized Au-CeO2 nanocomposites. All catalysts were fully characterized with the use of XRD, nitrogen physisorption, ICP-OES, SEM, HR-TEM, UV-vis, XPS, and tested in low-temperature oxidation of benzyl alcohol as a model oxidation reaction. The results obtained in this study indicated that the type of co-precipitation agent has a significant impact on the growth of gold species. Immediate co-precipitation of Au-CeO2 nanostructures with the use of NaOH allowed obtainment of considerably smaller and more homogeneous in size gold nanoparticles than those formed by gradual co-precipitation and growth of Au-CeO2 nanostructures in the presence of hexamethylenetetramine or urea. In the catalytic tests, it was established that the key factor promoting high activity in low-temperature oxidation of benzyl alcohol was size of gold nanoparticles. The highest conversion of the alcohol was observed for the catalyst containing the smallest Au particle size (i.e., Au-CeO2 nanocomposite prepared with the use of NaOH as a co-precipitation agent).

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