Effect of Gold on the Adsorption Properties of Acetaldehyde on Clean and h-BN Covered Rh(111) Surface

Auger electron spectroscopy, high-resolution electron energy loss spectroscopy and temperature programmed desorption methods have been used in order to investigate the adsorption properties and reactions of acetaldehyde on gold decorated rhodium and BN/Rh(111) surfaces. Scanning tunneling microscopy...

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Bibliographic Details
Published in:Topics in catalysis 2018-08, Vol.61 (12-13), p.1247-1256
Main Authors: Farkas, Arnold Péter, Szitás, Ádám, Vári, Gábor, Gubó, Richárd, Óvári, László, Berkó, András, Kiss, János, Kónya, Zoltán
Format: Article
Language:English
Subjects:
Acetaldehyde
Adsorption
Bimetals
Boron nitride
Carbon monoxide
Catalysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Electron energy
Electron energy loss spectroscopy
Ethanol
Gold
Industrial Chemistry/Chemical Engineering
Original Paper
Pharmacy
Physical Chemistry
Rhodium
Spectrum analysis
Surface alloying
Surface chemistry
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Summary:Auger electron spectroscopy, high-resolution electron energy loss spectroscopy and temperature programmed desorption methods have been used in order to investigate the adsorption properties and reactions of acetaldehyde on gold decorated rhodium and BN/Rh(111) surfaces. Scanning tunneling microscopy and X-ray photoelectron spectroscopy measurements were carried out to characterize the gold nanoparticles on clean and hexagonal boron nitride (h-BN) covered Rh(111). The adsorption of acetaldehyde was not completely hindered by gold atoms; however, depending on the structure of the outermost bimetallic layer (surface alloy) the dissociation of the parent molecule was suppressed, namely the production of carbon monoxide was inhibited by the gold domains. Our measurements with acetaldehyde on Au/h-BN/Rh(111) confirmed the observation that the lack of suitable adsorption sites eliminates the formation of CO. Nevertheless, increased coverage of gold enhanced the amount of adsorbed aldehyde at low temperature. We may predict that the low reactivity of acetaldehyde on Au/h-BN/Rh(111) significantly determine the ethanol decomposition mechanism on this surface.
ISSN:1022-5528
1572-9028
DOI:10.1007/s11244-018-0979-1