Bimodification of Mesoporous Silicon Oxide by Coupled “In Situ Oxidation at the Interface and Ion Exchange” and its Catalytic Activity in the Gas-Phase Toluene Oxidation

ChemCatChem ◽  
2012 ◽  
Vol 5 (4) ◽  
pp. 920-930 ◽  
Author(s):  
Altug S. Poyraz ◽  
Sourav Biswas ◽  
Homer C. Genuino ◽  
Saminda Dharmarathna ◽  
Chung-Hao Kuo ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ion Exchange ◽  
Gas Phase ◽  
Silicon Oxide ◽  
Toluene Oxidation ◽  
Mesoporous Silicon ◽  
In Situ Oxidation

The synthesis and characterization of nanosized orthorhombic LiMnO2 by in situ oxidation–ion exchange

2005 ◽  
Vol 176 (7-8) ◽  
pp. 803-811 ◽  
Author(s):  
Xiao-Dan Li ◽  
Wen-Sheng Yang ◽  
Shi-Chao Zhang ◽  
David G. Evans ◽  
Xue Duan
Keyword(s):  
Ion Exchange ◽  
Synthesis And Characterization ◽  
In Situ Oxidation ◽  
Orthorhombic Limno2

STM Studies of Electrode/Electrolyte Interfaces and Silicon Surface Reactions in Controlled Atmospheres

1996 ◽  
Vol 451 ◽  
Author(s):  
Christopher P. Wade ◽  
Huihong Luo ◽  
William L. Dunbar ◽  
Matthew R. Linford ◽  
Christopher E.D. Chidsey
Keyword(s):  
Gas Phase ◽  
Scanning Tunneling Microscope ◽  
Silicon Surface ◽  
Silicon Oxide ◽  
Ammonium Fluoride ◽  
Sample Surface ◽  
Silicon Surfaces ◽  
Scanning Tunneling ◽  
Controlled Atmospheres

ABSTRACTWe have assembled a scanning tunneling microscope with an inverted sample that allows the sample surface to be contacted by fluid electrolytes in a controlled atmosphere. A hanging meniscus is formed between the sample and a small cup surrounding the tunneling tip. In-situ imaging of the electrode/electrolyte interface is conveniently achieved with clean samples under potentiostatic control. The functioning of the microscope is illustrated by the imaging of the electrodeposition of copper on gold. This microscope has been used to image hydrogen-terminated silicon surfaces and to demonstrate that islands, tentatively assigned as silicon oxide, are formed on rinsing in water but can be avoided if the surface is not rinsed on withdrawal from the ammonium fluoride etching solution. Finally, STM shows that the convenient, gas-phase photochlorination of H-Si(111) produces the simple Cl-Si(111)(1×1) structure with little or no etching of the silicon surface.

Preparation SnO2 Nanolayer on Flexible Polyimide Substrates via Direct Ion-Exchange and in situ Oxidation Process

2011 ◽  
Vol 3 (3) ◽  
pp. 789-794 ◽  
Author(s):  
Guanghui Cui ◽  
Dezhen Wu ◽  
Shengli Qi ◽  
Shao Jin ◽  
Zhanpeng Wu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Oxidation Process ◽  
In Situ Oxidation

Technology Status Review In Situ Oxidation

1999 ◽  
Author(s):  
VIRGINIA UNIV CHARLOTTESVILLE
Keyword(s):  
In Situ Oxidation

Catalytic activity of rhodium(I) complexes containing (ω-trimethylsilylalkyl)diphenylphosphines

1980 ◽  
Vol 45 (8) ◽  
pp. 2219-2223 ◽  
Author(s):  
Marie Jakoubková ◽  
Martin Čapka
Keyword(s):  
Catalytic Activity ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Electron Density ◽  
Phosphorus Atom ◽  
Proton Acceptor ◽  
Trimethylsilyl Group ◽  
Kinetics Of

Kinetics of homogenous hydrogenation of 1-heptene catalysed by rhodium(I) complexes prepared in situ from μ,μ'-dichloro-bis(cyclooctenerhodium) and phosphines of the type RP(C6H5)2 (R = -CH3, -(CH2)nSi(CH3)3; n = 1-4) have been studied. The substitution of the ligands by the trimethylsilyl group was found to increase significantly the catalytic activity of the complexes. The results are discussed in relation to the electron density on the phosphorus atom determined by 31P NMR spectroscopy and to its proton acceptor ability determined by IR spectroscopy.

The effect of partial exchange of sulphonated macroporous styrene-divinylbenzene copolymers for different ions on their catalytic activity

1981 ◽  
Vol 46 (10) ◽  
pp. 2354-2363 ◽  
Author(s):  
Svatomír Kmošták ◽  
Karel Setínek
Keyword(s):  
Catalytic Activity ◽  
Transition Metal ◽  
Metal Ions ◽  
Gas Phase ◽  
Transition Metal Ions ◽  
Exchange Capacity ◽  
Total Exchange Capacity ◽  
Styrene Divinylbenzene ◽  
Na Ions ◽  
Type Of Transition

The catalytic activity of sulphonated macroporous styrene-divinylbenzene copolymers, the exchange capacity of which was neutralized from 30, 50 and 80% by Fe(III) ions and from 30% by Na ions and that of Wofatit Y-37 ion exchanger neutralized from 10% of its total exchange capacity by several transition metal ions and by sodium has been studied in isomerisation of cyclohexene and dehydration of 1-propanol in the gas phase at 130 °C. It was demonstrated that in both reactions transition metal ions exhibit additional effect to the expected neutralization of the polymer acid groups. In the case of cyclohexene isomerization, this effect depends on the degree of crosslinking of polymer mass of the catalyst. Such dependence has not been, however, observed in dehydration of 1-propanol. The type of transition metal ions did not exhibit any significant effect on the catalytic activity of the polymer catalysts studied.

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