K-stabilized high-oxygen-coverage states on Rh(110): A low-pressure pathway to formation of surface oxide

Article Abstract:

The evolution of the surface and chemical state of a Rh(110) surface, modified by K adlayers and exposed to high O2 doses at elevated temperatures is studied by using scanning tunneling microscopy, low-energy electron diffraction, and X-ray photoelectron spectroscopy. The findings indicate that oxygen coadsorption on the K-covered Rh(110) leads to massive reconstruction of the Rh(110) surface.

Usage, Chemical reactions, Scanning tunneling microscopy

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2D-Mapping of the catalyst structure inside a catalytic microreactor at work: Partial oxidation of methane over Rh/Al2O3

Article Abstract:

A demonstration that the 2D-monitoring of the Rh-oxidation state in a catalyst bed could be achieved during the catalytic reaction is presented using a suitable spectroscopic cell with gas supply and on-line mass spectrometry. For this purpose, X-ray images are recorded with the charged coupled device (CCD) camera at each energy around the Rh K-edge with and without the spectroscopic cell.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Aluminum Compounds, Oxidation-reduction reaction, Oxidation-reduction reactions

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NO adsorption and dissociation on Rh(111): PM-IRAS study

Article Abstract:

The in situ polarization-modulation infrared absorption spectroscopy is used to study the adsorption/ dissociation of NO on Rh(111). While these studies are not conclusive regarding the detailed surface structures formed during adsorption, they have provided important new information on the dissociation of NO on Rh(111).

Industrial Gas Manufacturing, Industrial gases, Nitric Oxide, Dissociation, Dissociation reactions, Atomic properties

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