Rhodium catalysts prepared by attachment of Rh6(CO)16 onto chemically modified silicas. Characterization of the infrared spectra in the carbonyl stretching region

Preparation and microscopy characterization of polymer modified glassy carbon electrodes based on (5-[(azulen-1-yl) methylene]-2-thioxothiazolidin-4-one (L) were reported. Atomic Force Microscopy was used to investigate the morphological and mechanical properties of the deposited polyL films onto glassy carbon. The topography images of the analyzed samples exhibited the presence of some columnar shape features onto the layer surfaces. The surface roughness of the layers deposited at constant charge calculated from topography images, increased with the more positive applied potential for controlled potential electrolysis. At different charges, the roughness parameter showed the same behavior for the layers obtained applying a constant potential without having a noticeable influence on the adhesion properties on the substrate. Analysis using scanning electron microscopy shows a relatively uniform surface arrangement of the polymer and the presence of some clusters which are disturbing the planarity. PolyL chemically modified electrodes have been used for heavy metal ions detection with best results for lead.

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Electron microscopic characterization of surface zones thermo-chemically modified by electrical discharge machining

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2020.116596 ◽

2020 ◽

Vol 280 ◽

pp. 116596 ◽

Cited By ~ 4

Author(s):

L.C. Ehle ◽

S. Schneider ◽

A. Schwedt ◽

S. Richter ◽

A. Klink ◽

...

Keyword(s):

Electrical Discharge ◽

Electrical Discharge Machining ◽

Electron Microscopic ◽

Chemically Modified

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Preparation and characterization of chemically modified high amylose maize starch-ascorbyl palmitate inclusion complexes in mild reaction condition

LWT ◽

10.1016/j.lwt.2021.110983 ◽

2021 ◽

Vol 142 ◽

pp. 110983

Author(s):

Dingpeng Zhou ◽

Shaowei Liu ◽

Haoyu Song ◽

Xue Liu ◽

Xiaozhi Tang

Keyword(s):

Inclusion Complexes ◽

Ascorbyl Palmitate ◽

Maize Starch ◽

Chemically Modified ◽

Reaction Condition ◽

High Amylose

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Synthesis and thermal characterization of chemically modified phenolic resins

Journal of Applied Polymer Science ◽

10.1002/app.1994.070540403 ◽

1994 ◽

Vol 54 (4) ◽

pp. 429-438 ◽

Cited By ~ 28

Author(s):

Rosy Antony ◽

C. K. S. Pillai

Keyword(s):

Thermal Characterization ◽

Phenolic Resins ◽

Chemically Modified

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Diffuse Reflectance FT-IR Characterization of Active Sites under Reaction Conditions: The Production of Oxygenates in the CO/H2 Reaction

Applied Spectroscopy ◽

10.1366/0003702944027345 ◽

1994 ◽

Vol 48 (10) ◽

pp. 1208-1212 ◽

Cited By ~ 7

Author(s):

J. J. Benítez ◽

I. Carrizosa ◽

J. A. Odriozola

Keyword(s):

Infrared Spectra ◽

Active Sites ◽

Diffuse Reflectance ◽

Reaction Conditions ◽

In Situ Drifts ◽

Ft Ir

The reactivity of a Lu2O3-promoted Rh/Al2O3 catalyst in the CO/H2 reaction is reported. Methane, heavier hydrocarbons, methanol, and ethanol are obtained. In situ DRIFTS has been employed to record the infrared spectra under the actual reaction conditions. The structure of the observed COads DRIFTS bands has been resolved into its components. The production of oxygenates (methanol and ethanol) has been correlated with the results of the deconvolution calculation. Specific sites for the production of methanol and ethanol in the CO/H2 reaction over a Rh,Lu2O3/Al2O3 catalyst are proposed.

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